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cpython/Lib/test/test_pdb.py

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# A test suite for pdb; not very comprehensive at the moment.
import doctest
import os
import pdb
import sys
import types
import codecs
import unittest
import subprocess
import textwrap
import linecache
from contextlib import ExitStack, redirect_stdout
from io import StringIO
from test import support
from test.support import os_helper
# This little helper class is essential for testing pdb under doctest.
from test.test_doctest import _FakeInput
from unittest.mock import patch
class PdbTestInput(object):
"""Context manager that makes testing Pdb in doctests easier."""
def __init__(self, input):
self.input = input
def __enter__(self):
self.real_stdin = sys.stdin
sys.stdin = _FakeInput(self.input)
self.orig_trace = sys.gettrace() if hasattr(sys, 'gettrace') else None
def __exit__(self, *exc):
sys.stdin = self.real_stdin
if self.orig_trace:
sys.settrace(self.orig_trace)
def test_pdb_displayhook():
"""This tests the custom displayhook for pdb.
>>> def test_function(foo, bar):
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... pass
>>> with PdbTestInput([
... 'foo',
... 'bar',
... 'for i in range(5): print(i)',
... 'continue',
... ]):
... test_function(1, None)
> <doctest test.test_pdb.test_pdb_displayhook[0]>(3)test_function()
-> pass
(Pdb) foo
1
(Pdb) bar
(Pdb) for i in range(5): print(i)
0
1
2
3
4
(Pdb) continue
"""
def test_pdb_basic_commands():
"""Test the basic commands of pdb.
>>> def test_function_2(foo, bar='default'):
... print(foo)
... for i in range(5):
... print(i)
... print(bar)
... for i in range(10):
... never_executed
... print('after for')
... print('...')
... return foo.upper()
>>> def test_function3(arg=None, *, kwonly=None):
... pass
>>> def test_function4(a, b, c, /):
... pass
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... ret = test_function_2('baz')
... test_function3(kwonly=True)
... test_function4(1, 2, 3)
... print(ret)
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'step', # entering the function call
... 'args', # display function args
... 'list', # list function source
... 'bt', # display backtrace
... 'up', # step up to test_function()
... 'down', # step down to test_function_2() again
... 'next', # stepping to print(foo)
... 'next', # stepping to the for loop
... 'step', # stepping into the for loop
... 'until', # continuing until out of the for loop
... 'next', # executing the print(bar)
... 'jump 8', # jump over second for loop
... 'return', # return out of function
... 'retval', # display return value
... 'next', # step to test_function3()
... 'step', # stepping into test_function3()
... 'args', # display function args
... 'return', # return out of function
... 'next', # step to test_function4()
... 'step', # stepping to test_function4()
... 'args', # display function args
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_basic_commands[3]>(3)test_function()
-> ret = test_function_2('baz')
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(1)test_function_2()
-> def test_function_2(foo, bar='default'):
(Pdb) args
foo = 'baz'
bar = 'default'
(Pdb) list
1 -> def test_function_2(foo, bar='default'):
2 print(foo)
3 for i in range(5):
4 print(i)
5 print(bar)
6 for i in range(10):
7 never_executed
8 print('after for')
9 print('...')
10 return foo.upper()
[EOF]
(Pdb) bt
...
<doctest test.test_pdb.test_pdb_basic_commands[4]>(25)<module>()
-> test_function()
<doctest test.test_pdb.test_pdb_basic_commands[3]>(3)test_function()
-> ret = test_function_2('baz')
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(1)test_function_2()
-> def test_function_2(foo, bar='default'):
(Pdb) up
> <doctest test.test_pdb.test_pdb_basic_commands[3]>(3)test_function()
-> ret = test_function_2('baz')
(Pdb) down
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(1)test_function_2()
-> def test_function_2(foo, bar='default'):
(Pdb) next
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(2)test_function_2()
-> print(foo)
(Pdb) next
baz
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(3)test_function_2()
-> for i in range(5):
(Pdb) step
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(4)test_function_2()
-> print(i)
(Pdb) until
0
1
2
3
4
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(5)test_function_2()
-> print(bar)
(Pdb) next
default
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(6)test_function_2()
-> for i in range(10):
(Pdb) jump 8
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(8)test_function_2()
-> print('after for')
(Pdb) return
after for
...
--Return--
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(10)test_function_2()->'BAZ'
-> return foo.upper()
(Pdb) retval
'BAZ'
(Pdb) next
> <doctest test.test_pdb.test_pdb_basic_commands[3]>(4)test_function()
-> test_function3(kwonly=True)
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_basic_commands[1]>(1)test_function3()
-> def test_function3(arg=None, *, kwonly=None):
(Pdb) args
arg = None
kwonly = True
(Pdb) return
--Return--
> <doctest test.test_pdb.test_pdb_basic_commands[1]>(2)test_function3()->None
-> pass
(Pdb) next
> <doctest test.test_pdb.test_pdb_basic_commands[3]>(5)test_function()
-> test_function4(1, 2, 3)
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_basic_commands[2]>(1)test_function4()
-> def test_function4(a, b, c, /):
(Pdb) args
a = 1
b = 2
c = 3
(Pdb) continue
BAZ
"""
def reset_Breakpoint():
import bdb
bdb.Breakpoint.clearBreakpoints()
def test_pdb_breakpoint_commands():
"""Test basic commands related to breakpoints.
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... print(1)
... print(2)
... print(3)
... print(4)
First, need to clear bdb state that might be left over from previous tests.
Otherwise, the new breakpoints might get assigned different numbers.
>>> reset_Breakpoint()
Now test the breakpoint commands. NORMALIZE_WHITESPACE is needed because
the breakpoint list outputs a tab for the "stop only" and "ignore next"
lines, which we don't want to put in here.
>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
... 'break 3',
... 'break 4, +',
... 'disable 1',
... 'ignore 1 10',
... 'condition 1 1 < 2',
... 'condition 1 1 <',
... 'break 4',
... 'break 4',
... 'break',
... 'clear 3',
... 'break',
... 'condition 1',
... 'enable 1',
... 'clear 1',
... 'commands 2',
... 'p "42"',
... 'print("42", 7*6)', # Issue 18764 (not about breakpoints)
... 'end',
... 'continue', # will stop at breakpoint 2 (line 4)
... 'clear', # clear all!
... 'y',
... 'tbreak 5',
... 'continue', # will stop at temporary breakpoint
... 'break', # make sure breakpoint is gone
... 'commands 10', # out of range
... 'commands a', # display help
... 'commands 4', # already deleted
... 'break 6, undefined', # condition causing `NameError` during evaluation
... 'continue', # will stop, ignoring runtime error
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(3)test_function()
-> print(1)
(Pdb) break 3
Breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
(Pdb) break 4, +
*** Invalid condition +: SyntaxError: invalid syntax
(Pdb) disable 1
Disabled breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
(Pdb) ignore 1 10
Will ignore next 10 crossings of breakpoint 1.
(Pdb) condition 1 1 < 2
New condition set for breakpoint 1.
(Pdb) condition 1 1 <
*** Invalid condition 1 <: SyntaxError: invalid syntax
(Pdb) break 4
Breakpoint 2 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
(Pdb) break 4
Breakpoint 3 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
(Pdb) break
Num Type Disp Enb Where
1 breakpoint keep no at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
stop only if 1 < 2
ignore next 10 hits
2 breakpoint keep yes at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
3 breakpoint keep yes at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
(Pdb) clear 3
Deleted breakpoint 3 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
(Pdb) break
Num Type Disp Enb Where
1 breakpoint keep no at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
stop only if 1 < 2
ignore next 10 hits
2 breakpoint keep yes at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
(Pdb) condition 1
Breakpoint 1 is now unconditional.
(Pdb) enable 1
Enabled breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
(Pdb) clear 1
Deleted breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
(Pdb) commands 2
(com) p "42"
(com) print("42", 7*6)
(com) end
(Pdb) continue
1
'42'
42 42
> <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(4)test_function()
-> print(2)
(Pdb) clear
Clear all breaks? y
Deleted breakpoint 2 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
(Pdb) tbreak 5
Breakpoint 4 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:5
(Pdb) continue
2
Deleted breakpoint 4 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:5
> <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(5)test_function()
-> print(3)
(Pdb) break
(Pdb) commands 10
*** cannot set commands: Breakpoint number 10 out of range
(Pdb) commands a
*** Invalid argument: a
Usage: (Pdb) commands [bpnumber]
(com) ...
(com) end
(Pdb)
(Pdb) commands 4
*** cannot set commands: Breakpoint 4 already deleted
(Pdb) break 6, undefined
Breakpoint 5 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:6
(Pdb) continue
3
> <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(6)test_function()
-> print(4)
(Pdb) continue
4
"""
def test_pdb_breakpoints_preserved_across_interactive_sessions():
"""Breakpoints are remembered between interactive sessions
>>> reset_Breakpoint()
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'import test.test_pdb',
... 'break test.test_pdb.do_something',
... 'break test.test_pdb.do_nothing',
... 'break',
... 'continue',
... ]):
... pdb.run('print()')
> <string>(1)<module>()...
(Pdb) import test.test_pdb
(Pdb) break test.test_pdb.do_something
Breakpoint 1 at ...test_pdb.py:...
(Pdb) break test.test_pdb.do_nothing
Breakpoint 2 at ...test_pdb.py:...
(Pdb) break
Num Type Disp Enb Where
1 breakpoint keep yes at ...test_pdb.py:...
2 breakpoint keep yes at ...test_pdb.py:...
(Pdb) continue
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'break',
... 'break pdb.find_function',
... 'break',
... 'clear 1',
... 'continue',
... ]):
... pdb.run('print()')
> <string>(1)<module>()...
(Pdb) break
Num Type Disp Enb Where
1 breakpoint keep yes at ...test_pdb.py:...
2 breakpoint keep yes at ...test_pdb.py:...
(Pdb) break pdb.find_function
Breakpoint 3 at ...pdb.py:...
(Pdb) break
Num Type Disp Enb Where
1 breakpoint keep yes at ...test_pdb.py:...
2 breakpoint keep yes at ...test_pdb.py:...
3 breakpoint keep yes at ...pdb.py:...
(Pdb) clear 1
Deleted breakpoint 1 at ...test_pdb.py:...
(Pdb) continue
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'break',
... 'clear 2',
... 'clear 3',
... 'continue',
... ]):
... pdb.run('print()')
> <string>(1)<module>()...
(Pdb) break
Num Type Disp Enb Where
2 breakpoint keep yes at ...test_pdb.py:...
3 breakpoint keep yes at ...pdb.py:...
(Pdb) clear 2
Deleted breakpoint 2 at ...test_pdb.py:...
(Pdb) clear 3
Deleted breakpoint 3 at ...pdb.py:...
(Pdb) continue
"""
def test_pdb_pp_repr_exc():
"""Test that do_p/do_pp do not swallow exceptions.
>>> class BadRepr:
... def __repr__(self):
... raise Exception('repr_exc')
>>> obj = BadRepr()
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
... 'p obj',
... 'pp obj',
... 'continue',
... ]):
... test_function()
--Return--
> <doctest test.test_pdb.test_pdb_pp_repr_exc[2]>(2)test_function()->None
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) p obj
*** Exception: repr_exc
(Pdb) pp obj
*** Exception: repr_exc
(Pdb) continue
"""
def do_nothing():
pass
def do_something():
print(42)
def test_list_commands():
"""Test the list and source commands of pdb.
>>> def test_function_2(foo):
... import test.test_pdb
... test.test_pdb.do_nothing()
... 'some...'
... 'more...'
... 'code...'
... 'to...'
... 'make...'
... 'a...'
... 'long...'
... 'listing...'
... 'useful...'
... '...'
... '...'
... return foo
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... ret = test_function_2('baz')
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'list', # list first function
... 'step', # step into second function
... 'list', # list second function
... 'list', # continue listing to EOF
... 'list 1,3', # list specific lines
... 'list x', # invalid argument
... 'next', # step to import
... 'next', # step over import
... 'step', # step into do_nothing
... 'longlist', # list all lines
... 'source do_something', # list all lines of function
... 'source fooxxx', # something that doesn't exit
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_list_commands[1]>(3)test_function()
-> ret = test_function_2('baz')
(Pdb) list
1 def test_function():
2 import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
3 -> ret = test_function_2('baz')
[EOF]
(Pdb) step
--Call--
> <doctest test.test_pdb.test_list_commands[0]>(1)test_function_2()
-> def test_function_2(foo):
(Pdb) list
1 -> def test_function_2(foo):
2 import test.test_pdb
3 test.test_pdb.do_nothing()
4 'some...'
5 'more...'
6 'code...'
7 'to...'
8 'make...'
9 'a...'
10 'long...'
11 'listing...'
(Pdb) list
12 'useful...'
13 '...'
14 '...'
15 return foo
[EOF]
(Pdb) list 1,3
1 -> def test_function_2(foo):
2 import test.test_pdb
3 test.test_pdb.do_nothing()
(Pdb) list x
*** ...
(Pdb) next
> <doctest test.test_pdb.test_list_commands[0]>(2)test_function_2()
-> import test.test_pdb
(Pdb) next
> <doctest test.test_pdb.test_list_commands[0]>(3)test_function_2()
-> test.test_pdb.do_nothing()
(Pdb) step
--Call--
> ...test_pdb.py(...)do_nothing()
-> def do_nothing():
(Pdb) longlist
... -> def do_nothing():
... pass
(Pdb) source do_something
... def do_something():
... print(42)
(Pdb) source fooxxx
*** ...
(Pdb) continue
"""
def test_pdb_whatis_command():
"""Test the whatis command
>>> myvar = (1,2)
>>> def myfunc():
... pass
>>> class MyClass:
... def mymethod(self):
... pass
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'whatis myvar',
... 'whatis myfunc',
... 'whatis MyClass',
... 'whatis MyClass()',
... 'whatis MyClass.mymethod',
... 'whatis MyClass().mymethod',
... 'continue',
... ]):
... test_function()
--Return--
> <doctest test.test_pdb.test_pdb_whatis_command[3]>(2)test_function()->None
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) whatis myvar
<class 'tuple'>
(Pdb) whatis myfunc
Function myfunc
(Pdb) whatis MyClass
Class test.test_pdb.MyClass
(Pdb) whatis MyClass()
<class 'test.test_pdb.MyClass'>
(Pdb) whatis MyClass.mymethod
Function mymethod
(Pdb) whatis MyClass().mymethod
Method mymethod
(Pdb) continue
"""
def test_pdb_display_command():
"""Test display command
>>> def test_function():
... a = 0
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... a = 1
... a = 2
... a = 3
... a = 4
>>> with PdbTestInput([ # doctest: +ELLIPSIS
... 'display +',
... 'display',
... 'display a',
... 'n',
... 'display',
... 'undisplay a',
... 'n',
... 'display a',
... 'undisplay',
... 'display a < 1',
... 'n',
... 'display undefined',
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_display_command[0]>(4)test_function()
-> a = 1
(Pdb) display +
*** Unable to display +: SyntaxError: invalid syntax
(Pdb) display
No expression is being displayed
(Pdb) display a
display a: 0
(Pdb) n
> <doctest test.test_pdb.test_pdb_display_command[0]>(5)test_function()
-> a = 2
display a: 1 [old: 0]
(Pdb) display
Currently displaying:
a: 1
(Pdb) undisplay a
(Pdb) n
> <doctest test.test_pdb.test_pdb_display_command[0]>(6)test_function()
-> a = 3
(Pdb) display a
display a: 2
(Pdb) undisplay
(Pdb) display a < 1
display a < 1: False
(Pdb) n
> <doctest test.test_pdb.test_pdb_display_command[0]>(7)test_function()
-> a = 4
(Pdb) display undefined
display undefined: ** raised NameError: name 'undefined' is not defined **
(Pdb) continue
"""
def test_pdb_alias_command():
"""Test alias command
>>> class A:
... def __init__(self):
... self.attr1 = 10
... self.attr2 = 'str'
... def method(self):
... pass
>>> def test_function():
... o = A()
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... o.method()
>>> with PdbTestInput([ # doctest: +ELLIPSIS
... 'alias pi for k in %1.__dict__.keys(): print(f"%1.{k} = {%1.__dict__[k]}")',
... 'alias ps pi self',
... 'pi o',
... 's',
... 'ps',
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_alias_command[1]>(4)test_function()
-> o.method()
(Pdb) alias pi for k in %1.__dict__.keys(): print(f"%1.{k} = {%1.__dict__[k]}")
(Pdb) alias ps pi self
(Pdb) pi o
o.attr1 = 10
o.attr2 = str
(Pdb) s
--Call--
> <doctest test.test_pdb.test_pdb_alias_command[0]>(5)method()
-> def method(self):
(Pdb) ps
self.attr1 = 10
self.attr2 = str
(Pdb) continue
"""
def test_pdb_where_command():
"""Test where command
>>> def g():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
>>> def f():
... g();
>>> def test_function():
... f()
>>> with PdbTestInput([ # doctest: +ELLIPSIS
... 'w',
... 'where',
... 'u',
... 'w',
... 'continue',
... ]):
... test_function()
--Return--
> <doctest test.test_pdb.test_pdb_where_command[0]>(2)g()->None
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) w
...
<doctest test.test_pdb.test_pdb_where_command[3]>(8)<module>()
-> test_function()
<doctest test.test_pdb.test_pdb_where_command[2]>(2)test_function()
-> f()
<doctest test.test_pdb.test_pdb_where_command[1]>(2)f()
-> g();
> <doctest test.test_pdb.test_pdb_where_command[0]>(2)g()->None
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) where
...
<doctest test.test_pdb.test_pdb_where_command[3]>(8)<module>()
-> test_function()
<doctest test.test_pdb.test_pdb_where_command[2]>(2)test_function()
-> f()
<doctest test.test_pdb.test_pdb_where_command[1]>(2)f()
-> g();
> <doctest test.test_pdb.test_pdb_where_command[0]>(2)g()->None
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) u
> <doctest test.test_pdb.test_pdb_where_command[1]>(2)f()
-> g();
(Pdb) w
...
<doctest test.test_pdb.test_pdb_where_command[3]>(8)<module>()
-> test_function()
<doctest test.test_pdb.test_pdb_where_command[2]>(2)test_function()
-> f()
> <doctest test.test_pdb.test_pdb_where_command[1]>(2)f()
-> g();
<doctest test.test_pdb.test_pdb_where_command[0]>(2)g()->None
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) continue
"""
def test_convenience_variables():
"""Test convenience variables
>>> def util_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... try:
... raise Exception('test')
... except:
... pass
... return 1
>>> def test_function():
... util_function()
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... '$_frame.f_lineno', # Check frame convenience variable
... '$a = 10', # Set a convenience variable
... '$a', # Print its value
... 'p $a + 2', # Do some calculation
... 'u', # Switch frame
... '$_frame.f_lineno', # Make sure the frame changed
... '$a', # Make sure the value persists
... 'd', # Go back to the original frame
... 'next',
... '$a', # The value should be gone
... 'next',
... '$_exception', # Check exception convenience variable
... 'next',
... '$_exception', # Exception should be gone
... 'return',
... '$_retval', # Check return convenience variable
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_convenience_variables[0]>(3)util_function()
-> try:
(Pdb) $_frame.f_lineno
3
(Pdb) $a = 10
(Pdb) $a
10
(Pdb) p $a + 2
12
(Pdb) u
> <doctest test.test_pdb.test_convenience_variables[1]>(2)test_function()
-> util_function()
(Pdb) $_frame.f_lineno
2
(Pdb) $a
10
(Pdb) d
> <doctest test.test_pdb.test_convenience_variables[0]>(3)util_function()
-> try:
(Pdb) next
> <doctest test.test_pdb.test_convenience_variables[0]>(4)util_function()
-> raise Exception('test')
(Pdb) $a
*** KeyError: 'a'
(Pdb) next
Exception: test
> <doctest test.test_pdb.test_convenience_variables[0]>(4)util_function()
-> raise Exception('test')
(Pdb) $_exception
Exception('test')
(Pdb) next
> <doctest test.test_pdb.test_convenience_variables[0]>(5)util_function()
-> except:
(Pdb) $_exception
*** KeyError: '_exception'
(Pdb) return
--Return--
> <doctest test.test_pdb.test_convenience_variables[0]>(7)util_function()->1
-> return 1
(Pdb) $_retval
1
(Pdb) continue
"""
def test_post_mortem_chained():
"""Test post mortem traceback debugging of chained exception
>>> def test_function_2():
... try:
... 1/0
... finally:
... print('Exception!')
>>> def test_function_reraise():
... try:
... test_function_2()
... except ZeroDivisionError as e:
... raise ZeroDivisionError('reraised') from e
>>> def test_function():
... import pdb;
... instance = pdb.Pdb(nosigint=True, readrc=False)
... try:
... test_function_reraise()
... except Exception as e:
... pdb._post_mortem(e, instance)
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'exceptions',
... 'exceptions 0',
... 'up',
... 'down',
... 'exceptions 1',
... 'up',
... 'down',
... 'exceptions -1',
... 'exceptions 3',
... 'up',
... 'exit',
... ]):
... try:
... test_function()
... except ZeroDivisionError:
... print('Correctly reraised.')
Exception!
> <doctest test.test_pdb.test_post_mortem_chained[1]>(5)test_function_reraise()
-> raise ZeroDivisionError('reraised') from e
(Pdb) exceptions
0 ZeroDivisionError('division by zero')
> 1 ZeroDivisionError('reraised')
(Pdb) exceptions 0
> <doctest test.test_pdb.test_post_mortem_chained[0]>(3)test_function_2()
-> 1/0
(Pdb) up
> <doctest test.test_pdb.test_post_mortem_chained[1]>(3)test_function_reraise()
-> test_function_2()
(Pdb) down
> <doctest test.test_pdb.test_post_mortem_chained[0]>(3)test_function_2()
-> 1/0
(Pdb) exceptions 1
> <doctest test.test_pdb.test_post_mortem_chained[1]>(5)test_function_reraise()
-> raise ZeroDivisionError('reraised') from e
(Pdb) up
> <doctest test.test_pdb.test_post_mortem_chained[2]>(5)test_function()
-> test_function_reraise()
(Pdb) down
> <doctest test.test_pdb.test_post_mortem_chained[1]>(5)test_function_reraise()
-> raise ZeroDivisionError('reraised') from e
(Pdb) exceptions -1
*** No exception with that number
(Pdb) exceptions 3
*** No exception with that number
(Pdb) up
> <doctest test.test_pdb.test_post_mortem_chained[2]>(5)test_function()
-> test_function_reraise()
(Pdb) exit
"""
def test_post_mortem_cause_no_context():
"""Test post mortem traceback debugging of chained exception
>>> def make_exc_with_stack(type_, *content, from_=None):
... try:
... raise type_(*content) from from_
... except Exception as out:
... return out
...
>>> def main():
... try:
... raise ValueError('Context Not Shown')
... except Exception as e1:
... raise ValueError("With Cause") from make_exc_with_stack(TypeError,'The Cause')
>>> def test_function():
... import pdb;
... instance = pdb.Pdb(nosigint=True, readrc=False)
... try:
... main()
... except Exception as e:
... pdb._post_mortem(e, instance)
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'exceptions',
... 'exceptions 0',
... 'exceptions 1',
... 'up',
... 'down',
... 'exit',
... ]):
... try:
... test_function()
... except ValueError:
... print('Ok.')
> <doctest test.test_pdb.test_post_mortem_cause_no_context[1]>(5)main()
-> raise ValueError("With Cause") from make_exc_with_stack(TypeError,'The Cause')
(Pdb) exceptions
0 TypeError('The Cause')
> 1 ValueError('With Cause')
(Pdb) exceptions 0
> <doctest test.test_pdb.test_post_mortem_cause_no_context[0]>(3)make_exc_with_stack()
-> raise type_(*content) from from_
(Pdb) exceptions 1
> <doctest test.test_pdb.test_post_mortem_cause_no_context[1]>(5)main()
-> raise ValueError("With Cause") from make_exc_with_stack(TypeError,'The Cause')
(Pdb) up
> <doctest test.test_pdb.test_post_mortem_cause_no_context[2]>(5)test_function()
-> main()
(Pdb) down
> <doctest test.test_pdb.test_post_mortem_cause_no_context[1]>(5)main()
-> raise ValueError("With Cause") from make_exc_with_stack(TypeError,'The Cause')
(Pdb) exit"""
def test_post_mortem_context_of_the_cause():
"""Test post mortem traceback debugging of chained exception
>>> def main():
... try:
... raise TypeError('Context of the cause')
... except Exception as e1:
... try:
... raise ValueError('Root Cause')
... except Exception as e2:
... ex = e2
... raise ValueError("With Cause, and cause has context") from ex
>>> def test_function():
... import pdb;
... instance = pdb.Pdb(nosigint=True, readrc=False)
... try:
... main()
... except Exception as e:
... pdb._post_mortem(e, instance)
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'exceptions',
... 'exceptions 2',
... 'up',
... 'down',
... 'exceptions 3',
... 'up',
... 'down',
... 'exceptions 4',
... 'up',
... 'down',
... 'exit',
... ]):
... try:
... test_function()
... except ValueError:
... print('Correctly reraised.')
> <doctest test.test_pdb.test_post_mortem_context_of_the_cause[0]>(9)main()
-> raise ValueError("With Cause, and cause has context") from ex
(Pdb) exceptions
0 TypeError('Context of the cause')
1 ValueError('Root Cause')
> 2 ValueError('With Cause, and cause has context')
(Pdb) exceptions 2
> <doctest test.test_pdb.test_post_mortem_context_of_the_cause[0]>(9)main()
-> raise ValueError("With Cause, and cause has context") from ex
(Pdb) up
> <doctest test.test_pdb.test_post_mortem_context_of_the_cause[1]>(5)test_function()
-> main()
(Pdb) down
> <doctest test.test_pdb.test_post_mortem_context_of_the_cause[0]>(9)main()
-> raise ValueError("With Cause, and cause has context") from ex
(Pdb) exceptions 3
*** No exception with that number
(Pdb) up
> <doctest test.test_pdb.test_post_mortem_context_of_the_cause[1]>(5)test_function()
-> main()
(Pdb) down
> <doctest test.test_pdb.test_post_mortem_context_of_the_cause[0]>(9)main()
-> raise ValueError("With Cause, and cause has context") from ex
(Pdb) exceptions 4
*** No exception with that number
(Pdb) up
> <doctest test.test_pdb.test_post_mortem_context_of_the_cause[1]>(5)test_function()
-> main()
(Pdb) down
> <doctest test.test_pdb.test_post_mortem_context_of_the_cause[0]>(9)main()
-> raise ValueError("With Cause, and cause has context") from ex
(Pdb) exit
"""
def test_post_mortem_from_none():
"""Test post mortem traceback debugging of chained exception
In particular that cause from None (which sets __supress_context__ to True)
does not show context.
>>> def main():
... try:
... raise TypeError('Context of the cause')
... except Exception as e1:
... raise ValueError("With Cause, and cause has context") from None
>>> def test_function():
... import pdb;
... instance = pdb.Pdb(nosigint=True, readrc=False)
... try:
... main()
... except Exception as e:
... pdb._post_mortem(e, instance)
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'exceptions',
... 'exit',
... ]):
... try:
... test_function()
... except ValueError:
... print('Correctly reraised.')
> <doctest test.test_pdb.test_post_mortem_from_none[0]>(5)main()
-> raise ValueError("With Cause, and cause has context") from None
(Pdb) exceptions
> 0 ValueError('With Cause, and cause has context')
(Pdb) exit
"""
def test_post_mortem_from_no_stack():
"""Test post mortem traceback debugging of chained exception
especially when one exception has no stack.
>>> def main():
... raise Exception() from Exception()
>>> def test_function():
... import pdb;
... instance = pdb.Pdb(nosigint=True, readrc=False)
... try:
... main()
... except Exception as e:
... pdb._post_mortem(e, instance)
>>> with PdbTestInput( # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... ["exceptions",
... "exceptions 0",
... "exit"],
... ):
... try:
... test_function()
... except ValueError:
... print('Correctly reraised.')
> <doctest test.test_pdb.test_post_mortem_from_no_stack[0]>(2)main()
-> raise Exception() from Exception()
(Pdb) exceptions
- Exception()
> 1 Exception()
(Pdb) exceptions 0
*** This exception does not have a traceback, cannot jump to it
(Pdb) exit
"""
def test_post_mortem_single_no_stack():
"""Test post mortem called when origin exception has no stack
>>> def test_function():
... import pdb;
... instance = pdb.Pdb(nosigint=True, readrc=False)
... import sys
... sys.last_exc = Exception()
... pdb._post_mortem(sys.last_exc, instance)
>>> with PdbTestInput( # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... []
... ):
... try:
... test_function()
... except ValueError as e:
... print(e)
A valid traceback must be passed if no exception is being handled
"""
def test_post_mortem_complex():
"""Test post mortem traceback debugging of chained exception
Test with simple and complex cycles, exception groups,...
>>> def make_ex_with_stack(type_, *content, from_=None):
... try:
... raise type_(*content) from from_
... except Exception as out:
... return out
...
>>> def cycle():
... try:
... raise ValueError("Cycle Leaf")
... except Exception as e:
... raise e from e
...
>>> def tri_cycle():
... a = make_ex_with_stack(ValueError, "Cycle1")
... b = make_ex_with_stack(ValueError, "Cycle2")
... c = make_ex_with_stack(ValueError, "Cycle3")
...
... a.__cause__ = b
... b.__cause__ = c
...
... raise c from a
...
>>> def cause():
... try:
... raise ValueError("Cause Leaf")
... except Exception as e:
... raise e
...
>>> def context(n=10):
... try:
... raise ValueError(f"Context Leaf {n}")
... except Exception as e:
... if n == 0:
... raise ValueError(f"With Context {n}") from e
... else:
... context(n - 1)
...
>>> def main():
... try:
... cycle()
... except Exception as e1:
... try:
... tri_cycle()
... except Exception as e2:
... ex = e2
... raise ValueError("With Context and With Cause") from ex
>>> def test_function():
... import pdb;
... instance = pdb.Pdb(nosigint=True, readrc=False)
... try:
... main()
... except Exception as e:
... pdb._post_mortem(e, instance)
>>> with PdbTestInput( # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... ["exceptions",
... "exceptions 0",
... "exceptions 1",
... "exceptions 2",
... "exceptions 3",
... "exit"],
... ):
... try:
... test_function()
... except ValueError:
... print('Correctly reraised.')
> <doctest test.test_pdb.test_post_mortem_complex[5]>(9)main()
-> raise ValueError("With Context and With Cause") from ex
(Pdb) exceptions
0 ValueError('Cycle2')
1 ValueError('Cycle1')
2 ValueError('Cycle3')
> 3 ValueError('With Context and With Cause')
(Pdb) exceptions 0
> <doctest test.test_pdb.test_post_mortem_complex[0]>(3)make_ex_with_stack()
-> raise type_(*content) from from_
(Pdb) exceptions 1
> <doctest test.test_pdb.test_post_mortem_complex[0]>(3)make_ex_with_stack()
-> raise type_(*content) from from_
(Pdb) exceptions 2
> <doctest test.test_pdb.test_post_mortem_complex[0]>(3)make_ex_with_stack()
-> raise type_(*content) from from_
(Pdb) exceptions 3
> <doctest test.test_pdb.test_post_mortem_complex[5]>(9)main()
-> raise ValueError("With Context and With Cause") from ex
(Pdb) exit
"""
def test_post_mortem():
"""Test post mortem traceback debugging.
>>> def test_function_2():
... try:
... 1/0
... finally:
... print('Exception!')
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... test_function_2()
... print('Not reached.')
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'next', # step over exception-raising call
... 'bt', # get a backtrace
... 'list', # list code of test_function()
... 'down', # step into test_function_2()
... 'list', # list code of test_function_2()
... 'continue',
... ]):
... try:
... test_function()
... except ZeroDivisionError:
... print('Correctly reraised.')
> <doctest test.test_pdb.test_post_mortem[1]>(3)test_function()
-> test_function_2()
(Pdb) next
Exception!
ZeroDivisionError: division by zero
> <doctest test.test_pdb.test_post_mortem[1]>(3)test_function()
-> test_function_2()
(Pdb) bt
...
<doctest test.test_pdb.test_post_mortem[2]>(10)<module>()
-> test_function()
> <doctest test.test_pdb.test_post_mortem[1]>(3)test_function()
-> test_function_2()
<doctest test.test_pdb.test_post_mortem[0]>(3)test_function_2()
-> 1/0
(Pdb) list
1 def test_function():
2 import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
3 -> test_function_2()
4 print('Not reached.')
[EOF]
(Pdb) down
> <doctest test.test_pdb.test_post_mortem[0]>(3)test_function_2()
-> 1/0
(Pdb) list
1 def test_function_2():
2 try:
3 >> 1/0
4 finally:
5 -> print('Exception!')
[EOF]
(Pdb) continue
Correctly reraised.
"""
def test_pdb_skip_modules():
"""This illustrates the simple case of module skipping.
>>> def skip_module():
... import string
... import pdb; pdb.Pdb(skip=['stri*'], nosigint=True, readrc=False).set_trace()
... string.capwords('FOO')
>>> with PdbTestInput([
... 'step',
... 'continue',
... ]):
... skip_module()
> <doctest test.test_pdb.test_pdb_skip_modules[0]>(4)skip_module()
-> string.capwords('FOO')
(Pdb) step
--Return--
> <doctest test.test_pdb.test_pdb_skip_modules[0]>(4)skip_module()->None
-> string.capwords('FOO')
(Pdb) continue
"""
def test_pdb_invalid_arg():
"""This tests pdb commands that have invalid arguments
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... pass
>>> with PdbTestInput([
... 'a = 3',
... 'll 4',
... 'step 1',
... 'continue'
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_invalid_arg[0]>(3)test_function()
-> pass
(Pdb) a = 3
*** Invalid argument: = 3
Usage: a(rgs)
(Pdb) ll 4
*** Invalid argument: 4
Usage: ll | longlist
(Pdb) step 1
*** Invalid argument: 1
Usage: s(tep)
(Pdb) continue
"""
# Module for testing skipping of module that makes a callback
mod = types.ModuleType('module_to_skip')
exec('def foo_pony(callback): x = 1; callback(); return None', mod.__dict__)
def test_pdb_skip_modules_with_callback():
"""This illustrates skipping of modules that call into other code.
>>> def skip_module():
... def callback():
... return None
... import pdb; pdb.Pdb(skip=['module_to_skip*'], nosigint=True, readrc=False).set_trace()
... mod.foo_pony(callback)
>>> with PdbTestInput([
... 'step',
... 'step',
... 'step',
... 'step',
... 'step',
... 'continue',
... ]):
... skip_module()
... pass # provides something to "step" to
> <doctest test.test_pdb.test_pdb_skip_modules_with_callback[0]>(5)skip_module()
-> mod.foo_pony(callback)
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_skip_modules_with_callback[0]>(2)callback()
-> def callback():
(Pdb) step
> <doctest test.test_pdb.test_pdb_skip_modules_with_callback[0]>(3)callback()
-> return None
(Pdb) step
--Return--
> <doctest test.test_pdb.test_pdb_skip_modules_with_callback[0]>(3)callback()->None
-> return None
(Pdb) step
--Return--
> <doctest test.test_pdb.test_pdb_skip_modules_with_callback[0]>(5)skip_module()->None
-> mod.foo_pony(callback)
(Pdb) step
> <doctest test.test_pdb.test_pdb_skip_modules_with_callback[1]>(10)<module>()
-> pass # provides something to "step" to
(Pdb) continue
"""
def test_pdb_continue_in_bottomframe():
"""Test that "continue" and "next" work properly in bottom frame (issue #5294).
>>> def test_function():
... import pdb, sys; inst = pdb.Pdb(nosigint=True, readrc=False)
... inst.set_trace()
... inst.botframe = sys._getframe() # hackery to get the right botframe
... print(1)
... print(2)
... print(3)
... print(4)
>>> with PdbTestInput([ # doctest: +ELLIPSIS
... 'next',
... 'break 7',
... 'continue',
... 'next',
... 'continue',
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_continue_in_bottomframe[0]>(4)test_function()
-> inst.botframe = sys._getframe() # hackery to get the right botframe
(Pdb) next
> <doctest test.test_pdb.test_pdb_continue_in_bottomframe[0]>(5)test_function()
-> print(1)
(Pdb) break 7
Breakpoint ... at <doctest test.test_pdb.test_pdb_continue_in_bottomframe[0]>:7
(Pdb) continue
1
2
> <doctest test.test_pdb.test_pdb_continue_in_bottomframe[0]>(7)test_function()
-> print(3)
(Pdb) next
3
> <doctest test.test_pdb.test_pdb_continue_in_bottomframe[0]>(8)test_function()
-> print(4)
(Pdb) continue
4
"""
def pdb_invoke(method, arg):
"""Run pdb.method(arg)."""
getattr(pdb.Pdb(nosigint=True, readrc=False), method)(arg)
def test_pdb_run_with_incorrect_argument():
"""Testing run and runeval with incorrect first argument.
>>> pti = PdbTestInput(['continue',])
>>> with pti:
... pdb_invoke('run', lambda x: x)
Traceback (most recent call last):
TypeError: exec() arg 1 must be a string, bytes or code object
>>> with pti:
... pdb_invoke('runeval', lambda x: x)
Traceback (most recent call last):
TypeError: eval() arg 1 must be a string, bytes or code object
"""
def test_pdb_run_with_code_object():
"""Testing run and runeval with code object as a first argument.
>>> with PdbTestInput(['step','x', 'continue']): # doctest: +ELLIPSIS
... pdb_invoke('run', compile('x=1', '<string>', 'exec'))
> <string>(1)<module>()...
(Pdb) step
--Return--
> <string>(1)<module>()->None
(Pdb) x
1
(Pdb) continue
>>> with PdbTestInput(['x', 'continue']):
... x=0
... pdb_invoke('runeval', compile('x+1', '<string>', 'eval'))
> <string>(1)<module>()->None
(Pdb) x
1
(Pdb) continue
"""
def test_next_until_return_at_return_event():
"""Test that pdb stops after a next/until/return issued at a return debug event.
>>> def test_function_2():
... x = 1
... x = 2
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... test_function_2()
... test_function_2()
... test_function_2()
... end = 1
>>> reset_Breakpoint()
>>> with PdbTestInput(['break test_function_2',
... 'continue',
... 'return',
... 'next',
... 'continue',
... 'return',
... 'until',
... 'continue',
... 'return',
... 'return',
... 'continue']):
... test_function()
> <doctest test.test_pdb.test_next_until_return_at_return_event[1]>(3)test_function()
-> test_function_2()
(Pdb) break test_function_2
Breakpoint 1 at <doctest test.test_pdb.test_next_until_return_at_return_event[0]>:1
(Pdb) continue
> <doctest test.test_pdb.test_next_until_return_at_return_event[0]>(2)test_function_2()
-> x = 1
(Pdb) return
--Return--
> <doctest test.test_pdb.test_next_until_return_at_return_event[0]>(3)test_function_2()->None
-> x = 2
(Pdb) next
> <doctest test.test_pdb.test_next_until_return_at_return_event[1]>(4)test_function()
-> test_function_2()
(Pdb) continue
> <doctest test.test_pdb.test_next_until_return_at_return_event[0]>(2)test_function_2()
-> x = 1
(Pdb) return
--Return--
> <doctest test.test_pdb.test_next_until_return_at_return_event[0]>(3)test_function_2()->None
-> x = 2
(Pdb) until
> <doctest test.test_pdb.test_next_until_return_at_return_event[1]>(5)test_function()
-> test_function_2()
(Pdb) continue
> <doctest test.test_pdb.test_next_until_return_at_return_event[0]>(2)test_function_2()
-> x = 1
(Pdb) return
--Return--
> <doctest test.test_pdb.test_next_until_return_at_return_event[0]>(3)test_function_2()->None
-> x = 2
(Pdb) return
> <doctest test.test_pdb.test_next_until_return_at_return_event[1]>(6)test_function()
-> end = 1
(Pdb) continue
"""
def test_pdb_next_command_for_generator():
"""Testing skip unwindng stack on yield for generators for "next" command
>>> def test_gen():
... yield 0
... return 1
... yield 2
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... it = test_gen()
... try:
... if next(it) != 0:
... raise AssertionError
... next(it)
... except StopIteration as ex:
... if ex.value != 1:
... raise AssertionError
... print("finished")
>>> with PdbTestInput(['step',
... 'step',
... 'step',
... 'next',
... 'next',
... 'step',
... 'step',
... 'continue']):
... test_function()
> <doctest test.test_pdb.test_pdb_next_command_for_generator[1]>(3)test_function()
-> it = test_gen()
(Pdb) step
> <doctest test.test_pdb.test_pdb_next_command_for_generator[1]>(4)test_function()
-> try:
(Pdb) step
> <doctest test.test_pdb.test_pdb_next_command_for_generator[1]>(5)test_function()
-> if next(it) != 0:
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_next_command_for_generator[0]>(1)test_gen()
-> def test_gen():
(Pdb) next
> <doctest test.test_pdb.test_pdb_next_command_for_generator[0]>(2)test_gen()
-> yield 0
(Pdb) next
> <doctest test.test_pdb.test_pdb_next_command_for_generator[0]>(3)test_gen()
-> return 1
(Pdb) step
--Return--
> <doctest test.test_pdb.test_pdb_next_command_for_generator[0]>(3)test_gen()->1
-> return 1
(Pdb) step
StopIteration: 1
> <doctest test.test_pdb.test_pdb_next_command_for_generator[1]>(7)test_function()
-> next(it)
(Pdb) continue
finished
"""
def test_pdb_next_command_for_coroutine():
"""Testing skip unwindng stack on yield for coroutines for "next" command
>>> import asyncio
>>> async def test_coro():
... await asyncio.sleep(0)
... await asyncio.sleep(0)
... await asyncio.sleep(0)
>>> async def test_main():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... await test_coro()
>>> def test_function():
... loop = asyncio.new_event_loop()
... loop.run_until_complete(test_main())
... loop.close()
... asyncio.set_event_loop_policy(None)
... print("finished")
>>> with PdbTestInput(['step',
... 'step',
... 'next',
... 'next',
... 'next',
... 'step',
... 'continue']):
... test_function()
> <doctest test.test_pdb.test_pdb_next_command_for_coroutine[2]>(3)test_main()
-> await test_coro()
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_next_command_for_coroutine[1]>(1)test_coro()
-> async def test_coro():
(Pdb) step
> <doctest test.test_pdb.test_pdb_next_command_for_coroutine[1]>(2)test_coro()
-> await asyncio.sleep(0)
(Pdb) next
> <doctest test.test_pdb.test_pdb_next_command_for_coroutine[1]>(3)test_coro()
-> await asyncio.sleep(0)
(Pdb) next
> <doctest test.test_pdb.test_pdb_next_command_for_coroutine[1]>(4)test_coro()
-> await asyncio.sleep(0)
(Pdb) next
Internal StopIteration
> <doctest test.test_pdb.test_pdb_next_command_for_coroutine[2]>(3)test_main()
-> await test_coro()
(Pdb) step
--Return--
> <doctest test.test_pdb.test_pdb_next_command_for_coroutine[2]>(3)test_main()->None
-> await test_coro()
(Pdb) continue
finished
"""
def test_pdb_next_command_for_asyncgen():
"""Testing skip unwindng stack on yield for coroutines for "next" command
>>> import asyncio
>>> async def agen():
... yield 1
... await asyncio.sleep(0)
... yield 2
>>> async def test_coro():
... async for x in agen():
... print(x)
>>> async def test_main():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... await test_coro()
>>> def test_function():
... loop = asyncio.new_event_loop()
... loop.run_until_complete(test_main())
... loop.close()
... asyncio.set_event_loop_policy(None)
... print("finished")
>>> with PdbTestInput(['step',
... 'step',
... 'next',
... 'next',
... 'step',
... 'next',
... 'continue']):
... test_function()
> <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[3]>(3)test_main()
-> await test_coro()
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[2]>(1)test_coro()
-> async def test_coro():
(Pdb) step
> <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[2]>(2)test_coro()
-> async for x in agen():
(Pdb) next
> <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[2]>(3)test_coro()
-> print(x)
(Pdb) next
1
> <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[2]>(2)test_coro()
-> async for x in agen():
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[1]>(2)agen()
-> yield 1
(Pdb) next
> <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[1]>(3)agen()
-> await asyncio.sleep(0)
(Pdb) continue
2
finished
"""
def test_pdb_return_command_for_generator():
"""Testing no unwindng stack on yield for generators
for "return" command
>>> def test_gen():
... yield 0
... return 1
... yield 2
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... it = test_gen()
... try:
... if next(it) != 0:
... raise AssertionError
... next(it)
... except StopIteration as ex:
... if ex.value != 1:
... raise AssertionError
... print("finished")
>>> with PdbTestInput(['step',
... 'step',
... 'step',
... 'return',
... 'step',
... 'step',
... 'continue']):
... test_function()
> <doctest test.test_pdb.test_pdb_return_command_for_generator[1]>(3)test_function()
-> it = test_gen()
(Pdb) step
> <doctest test.test_pdb.test_pdb_return_command_for_generator[1]>(4)test_function()
-> try:
(Pdb) step
> <doctest test.test_pdb.test_pdb_return_command_for_generator[1]>(5)test_function()
-> if next(it) != 0:
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_return_command_for_generator[0]>(1)test_gen()
-> def test_gen():
(Pdb) return
StopIteration: 1
> <doctest test.test_pdb.test_pdb_return_command_for_generator[1]>(7)test_function()
-> next(it)
(Pdb) step
> <doctest test.test_pdb.test_pdb_return_command_for_generator[1]>(8)test_function()
-> except StopIteration as ex:
(Pdb) step
> <doctest test.test_pdb.test_pdb_return_command_for_generator[1]>(9)test_function()
-> if ex.value != 1:
(Pdb) continue
finished
"""
def test_pdb_return_command_for_coroutine():
"""Testing no unwindng stack on yield for coroutines for "return" command
>>> import asyncio
>>> async def test_coro():
... await asyncio.sleep(0)
... await asyncio.sleep(0)
... await asyncio.sleep(0)
>>> async def test_main():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... await test_coro()
>>> def test_function():
... loop = asyncio.new_event_loop()
... loop.run_until_complete(test_main())
... loop.close()
... asyncio.set_event_loop_policy(None)
... print("finished")
>>> with PdbTestInput(['step',
... 'step',
... 'next',
... 'continue']):
... test_function()
> <doctest test.test_pdb.test_pdb_return_command_for_coroutine[2]>(3)test_main()
-> await test_coro()
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_return_command_for_coroutine[1]>(1)test_coro()
-> async def test_coro():
(Pdb) step
> <doctest test.test_pdb.test_pdb_return_command_for_coroutine[1]>(2)test_coro()
-> await asyncio.sleep(0)
(Pdb) next
> <doctest test.test_pdb.test_pdb_return_command_for_coroutine[1]>(3)test_coro()
-> await asyncio.sleep(0)
(Pdb) continue
finished
"""
def test_pdb_until_command_for_generator():
"""Testing no unwindng stack on yield for generators
for "until" command if target breakpoint is not reached
>>> def test_gen():
... yield 0
... yield 1
... yield 2
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... for i in test_gen():
... print(i)
... print("finished")
>>> with PdbTestInput(['step',
... 'until 4',
... 'step',
... 'step',
... 'continue']):
... test_function()
> <doctest test.test_pdb.test_pdb_until_command_for_generator[1]>(3)test_function()
-> for i in test_gen():
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_until_command_for_generator[0]>(1)test_gen()
-> def test_gen():
(Pdb) until 4
0
1
> <doctest test.test_pdb.test_pdb_until_command_for_generator[0]>(4)test_gen()
-> yield 2
(Pdb) step
--Return--
> <doctest test.test_pdb.test_pdb_until_command_for_generator[0]>(4)test_gen()->2
-> yield 2
(Pdb) step
> <doctest test.test_pdb.test_pdb_until_command_for_generator[1]>(4)test_function()
-> print(i)
(Pdb) continue
2
finished
"""
def test_pdb_until_command_for_coroutine():
"""Testing no unwindng stack for coroutines
for "until" command if target breakpoint is not reached
>>> import asyncio
>>> async def test_coro():
... print(0)
... await asyncio.sleep(0)
... print(1)
... await asyncio.sleep(0)
... print(2)
... await asyncio.sleep(0)
... print(3)
>>> async def test_main():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... await test_coro()
>>> def test_function():
... loop = asyncio.new_event_loop()
... loop.run_until_complete(test_main())
... loop.close()
... asyncio.set_event_loop_policy(None)
... print("finished")
>>> with PdbTestInput(['step',
... 'until 8',
... 'continue']):
... test_function()
> <doctest test.test_pdb.test_pdb_until_command_for_coroutine[2]>(3)test_main()
-> await test_coro()
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_until_command_for_coroutine[1]>(1)test_coro()
-> async def test_coro():
(Pdb) until 8
0
1
2
> <doctest test.test_pdb.test_pdb_until_command_for_coroutine[1]>(8)test_coro()
-> print(3)
(Pdb) continue
3
finished
"""
def test_pdb_next_command_in_generator_for_loop():
"""The next command on returning from a generator controlled by a for loop.
>>> def test_gen():
... yield 0
... return 1
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... for i in test_gen():
... print('value', i)
... x = 123
>>> reset_Breakpoint()
>>> with PdbTestInput(['break test_gen',
... 'continue',
... 'next',
... 'next',
... 'next',
... 'continue']):
... test_function()
> <doctest test.test_pdb.test_pdb_next_command_in_generator_for_loop[1]>(3)test_function()
-> for i in test_gen():
(Pdb) break test_gen
Breakpoint 1 at <doctest test.test_pdb.test_pdb_next_command_in_generator_for_loop[0]>:1
(Pdb) continue
> <doctest test.test_pdb.test_pdb_next_command_in_generator_for_loop[0]>(2)test_gen()
-> yield 0
(Pdb) next
value 0
> <doctest test.test_pdb.test_pdb_next_command_in_generator_for_loop[0]>(3)test_gen()
-> return 1
(Pdb) next
Internal StopIteration: 1
> <doctest test.test_pdb.test_pdb_next_command_in_generator_for_loop[1]>(3)test_function()
-> for i in test_gen():
(Pdb) next
> <doctest test.test_pdb.test_pdb_next_command_in_generator_for_loop[1]>(5)test_function()
-> x = 123
(Pdb) continue
"""
def test_pdb_next_command_subiterator():
"""The next command in a generator with a subiterator.
>>> def test_subgenerator():
... yield 0
... return 1
>>> def test_gen():
... x = yield from test_subgenerator()
... return x
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... for i in test_gen():
... print('value', i)
... x = 123
>>> with PdbTestInput(['step',
... 'step',
... 'next',
... 'next',
... 'next',
... 'continue']):
... test_function()
> <doctest test.test_pdb.test_pdb_next_command_subiterator[2]>(3)test_function()
-> for i in test_gen():
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_next_command_subiterator[1]>(1)test_gen()
-> def test_gen():
(Pdb) step
> <doctest test.test_pdb.test_pdb_next_command_subiterator[1]>(2)test_gen()
-> x = yield from test_subgenerator()
(Pdb) next
value 0
> <doctest test.test_pdb.test_pdb_next_command_subiterator[1]>(3)test_gen()
-> return x
(Pdb) next
Internal StopIteration: 1
> <doctest test.test_pdb.test_pdb_next_command_subiterator[2]>(3)test_function()
-> for i in test_gen():
(Pdb) next
> <doctest test.test_pdb.test_pdb_next_command_subiterator[2]>(5)test_function()
-> x = 123
(Pdb) continue
"""
def test_pdb_multiline_statement():
"""Test for multiline statement
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... pass
>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
... 'def f(x):',
... ' return x * 2',
... '',
... 'f(2)',
... 'c'
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_multiline_statement[0]>(3)test_function()
-> pass
(Pdb) def f(x):
... return x * 2
...
(Pdb) f(2)
4
(Pdb) c
"""
def test_pdb_show_attribute_and_item():
"""Test for multiline statement
>>> def test_function():
... n = lambda x: x
... c = {"a": 1}
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... pass
>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
... 'c["a"]',
... 'c.get("a")',
... 'n(1)',
... 'j=1',
... 'j+1',
... 'r"a"',
... 'next(iter([1]))',
... 'list((0, 1))',
... 'c'
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_show_attribute_and_item[0]>(5)test_function()
-> pass
(Pdb) c["a"]
1
(Pdb) c.get("a")
1
(Pdb) n(1)
1
(Pdb) j=1
(Pdb) j+1
2
(Pdb) r"a"
'a'
(Pdb) next(iter([1]))
1
(Pdb) list((0, 1))
[0, 1]
(Pdb) c
"""
def test_pdb_issue_20766():
"""Test for reference leaks when the SIGINT handler is set.
>>> def test_function():
... i = 1
... while i <= 2:
... sess = pdb.Pdb()
... sess.set_trace(sys._getframe())
... print('pdb %d: %s' % (i, sess._previous_sigint_handler))
... i += 1
>>> reset_Breakpoint()
>>> with PdbTestInput(['continue',
... 'continue']):
... test_function()
> <doctest test.test_pdb.test_pdb_issue_20766[0]>(6)test_function()
-> print('pdb %d: %s' % (i, sess._previous_sigint_handler))
(Pdb) continue
pdb 1: <built-in function default_int_handler>
> <doctest test.test_pdb.test_pdb_issue_20766[0]>(6)test_function()
-> print('pdb %d: %s' % (i, sess._previous_sigint_handler))
(Pdb) continue
pdb 2: <built-in function default_int_handler>
"""
def test_pdb_issue_43318():
"""echo breakpoints cleared with filename:lineno
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... print(1)
... print(2)
... print(3)
... print(4)
>>> reset_Breakpoint()
>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
... 'break 3',
... 'clear <doctest test.test_pdb.test_pdb_issue_43318[0]>:3',
... 'continue'
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_issue_43318[0]>(3)test_function()
-> print(1)
(Pdb) break 3
Breakpoint 1 at <doctest test.test_pdb.test_pdb_issue_43318[0]>:3
(Pdb) clear <doctest test.test_pdb.test_pdb_issue_43318[0]>:3
Deleted breakpoint 1 at <doctest test.test_pdb.test_pdb_issue_43318[0]>:3
(Pdb) continue
1
2
3
4
"""
def test_pdb_issue_gh_91742():
"""See GH-91742
>>> def test_function():
... __author__ = "pi"
... __version__ = "3.14"
...
... def about():
... '''About'''
... print(f"Author: {__author__!r}",
... f"Version: {__version__!r}",
... sep=" ")
...
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... about()
>>> reset_Breakpoint()
>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
... 'step',
... 'next',
... 'next',
... 'jump 5',
... 'continue'
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_issue_gh_91742[0]>(12)test_function()
-> about()
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_issue_gh_91742[0]>(5)about()
-> def about():
(Pdb) next
> <doctest test.test_pdb.test_pdb_issue_gh_91742[0]>(7)about()
-> print(f"Author: {__author__!r}",
(Pdb) next
> <doctest test.test_pdb.test_pdb_issue_gh_91742[0]>(8)about()
-> f"Version: {__version__!r}",
(Pdb) jump 5
> <doctest test.test_pdb.test_pdb_issue_gh_91742[0]>(5)about()
-> def about():
(Pdb) continue
Author: 'pi' Version: '3.14'
"""
def test_pdb_issue_gh_94215():
"""See GH-94215
Check that frame_setlineno() does not leak references.
>>> def test_function():
... def func():
... def inner(v): pass
... inner(
... 42
... )
...
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... func()
>>> reset_Breakpoint()
>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
... 'step',
... 'next',
... 'next',
... 'jump 3',
... 'next',
... 'next',
... 'jump 3',
... 'next',
... 'next',
... 'jump 3',
... 'continue'
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_issue_gh_94215[0]>(9)test_function()
-> func()
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_issue_gh_94215[0]>(2)func()
-> def func():
(Pdb) next
> <doctest test.test_pdb.test_pdb_issue_gh_94215[0]>(3)func()
-> def inner(v): pass
(Pdb) next
> <doctest test.test_pdb.test_pdb_issue_gh_94215[0]>(4)func()
-> inner(
(Pdb) jump 3
> <doctest test.test_pdb.test_pdb_issue_gh_94215[0]>(3)func()
-> def inner(v): pass
(Pdb) next
> <doctest test.test_pdb.test_pdb_issue_gh_94215[0]>(4)func()
-> inner(
(Pdb) next
> <doctest test.test_pdb.test_pdb_issue_gh_94215[0]>(5)func()
-> 42
(Pdb) jump 3
> <doctest test.test_pdb.test_pdb_issue_gh_94215[0]>(3)func()
-> def inner(v): pass
(Pdb) next
> <doctest test.test_pdb.test_pdb_issue_gh_94215[0]>(4)func()
-> inner(
(Pdb) next
> <doctest test.test_pdb.test_pdb_issue_gh_94215[0]>(5)func()
-> 42
(Pdb) jump 3
> <doctest test.test_pdb.test_pdb_issue_gh_94215[0]>(3)func()
-> def inner(v): pass
(Pdb) continue
"""
def test_pdb_issue_gh_101673():
"""See GH-101673
Make sure ll won't revert local variable assignment
>>> def test_function():
... a = 1
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
... '!a = 2',
... 'll',
... 'p a',
... 'continue'
... ]):
... test_function()
--Return--
> <doctest test.test_pdb.test_pdb_issue_gh_101673[0]>(3)test_function()->None
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) !a = 2
(Pdb) ll
1 def test_function():
2 a = 1
3 -> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) p a
2
(Pdb) continue
"""
def test_pdb_issue_gh_103225():
"""See GH-103225
Make sure longlist uses 1-based line numbers in frames that correspond to a module
>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
... 'longlist',
... 'continue'
... ]):
... a = 1
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... b = 2
> <doctest test.test_pdb.test_pdb_issue_gh_103225[0]>(7)<module>()
-> b = 2
(Pdb) longlist
1 with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
2 'longlist',
3 'continue'
4 ]):
5 a = 1
6 import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
7 -> b = 2
(Pdb) continue
"""
def test_pdb_issue_gh_101517():
"""See GH-101517
Make sure pdb doesn't crash when the exception is caught in a try/except* block
>>> def test_function():
... try:
... raise KeyError
... except* Exception as e:
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
... 'continue'
... ]):
... test_function()
--Return--
> <doctest test.test_pdb.test_pdb_issue_gh_101517[0]>(None)test_function()->None
-> Warning: lineno is None
(Pdb) continue
"""
def test_pdb_ambiguous_statements():
"""See GH-104301
Make sure that ambiguous statements prefixed by '!' are properly disambiguated
>>> with PdbTestInput([
... '! n = 42', # disambiguated statement: reassign the name n
... 'n', # advance the debugger into the print()
... 'continue'
... ]):
... n = -1
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... print(f"The value of n is {n}")
> <doctest test.test_pdb.test_pdb_ambiguous_statements[0]>(8)<module>()
-> print(f"The value of n is {n}")
(Pdb) ! n = 42
(Pdb) n
The value of n is 42
> <doctest test.test_pdb.test_pdb_ambiguous_statements[0]>(1)<module>()
-> with PdbTestInput([
(Pdb) continue
"""
@support.requires_subprocess()
class PdbTestCase(unittest.TestCase):
def tearDown(self):
os_helper.unlink(os_helper.TESTFN)
@unittest.skipIf(sys.flags.safe_path,
'PYTHONSAFEPATH changes default sys.path')
def _run_pdb(self, pdb_args, commands, expected_returncode=0):
self.addCleanup(os_helper.rmtree, '__pycache__')
cmd = [sys.executable, '-m', 'pdb'] + pdb_args
with subprocess.Popen(
cmd,
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,
stderr=subprocess.STDOUT,
env = {**os.environ, 'PYTHONIOENCODING': 'utf-8'}
) as proc:
stdout, stderr = proc.communicate(str.encode(commands))
stdout = stdout and bytes.decode(stdout)
stderr = stderr and bytes.decode(stderr)
self.assertEqual(
proc.returncode,
expected_returncode,
f"Unexpected return code\nstdout: {stdout}\nstderr: {stderr}"
)
return stdout, stderr
def run_pdb_script(self, script, commands, expected_returncode=0):
"""Run 'script' lines with pdb and the pdb 'commands'."""
filename = 'main.py'
with open(filename, 'w') as f:
f.write(textwrap.dedent(script))
self.addCleanup(os_helper.unlink, filename)
return self._run_pdb([filename], commands, expected_returncode)
def run_pdb_module(self, script, commands):
"""Runs the script code as part of a module"""
self.module_name = 't_main'
os_helper.rmtree(self.module_name)
main_file = self.module_name + '/__main__.py'
init_file = self.module_name + '/__init__.py'
os.mkdir(self.module_name)
with open(init_file, 'w') as f:
pass
with open(main_file, 'w') as f:
f.write(textwrap.dedent(script))
self.addCleanup(os_helper.rmtree, self.module_name)
return self._run_pdb(['-m', self.module_name], commands)
def _assert_find_function(self, file_content, func_name, expected):
with open(os_helper.TESTFN, 'wb') as f:
f.write(file_content)
expected = None if not expected else (
expected[0], os_helper.TESTFN, expected[1])
self.assertEqual(
expected, pdb.find_function(func_name, os_helper.TESTFN))
def test_find_function_empty_file(self):
self._assert_find_function(b'', 'foo', None)
def test_find_function_found(self):
self._assert_find_function(
"""\
def foo():
pass
def bœr():
pass
def quux():
pass
""".encode(),
'bœr',
('bœr', 4),
)
def test_find_function_found_with_encoding_cookie(self):
self._assert_find_function(
"""\
# coding: iso-8859-15
def foo():
pass
def bœr():
pass
def quux():
pass
""".encode('iso-8859-15'),
'bœr',
('bœr', 5),
)
def test_find_function_found_with_bom(self):
self._assert_find_function(
codecs.BOM_UTF8 + """\
def bœr():
pass
""".encode(),
'bœr',
('bœr', 1),
)
def test_issue7964(self):
# open the file as binary so we can force \r\n newline
with open(os_helper.TESTFN, 'wb') as f:
f.write(b'print("testing my pdb")\r\n')
cmd = [sys.executable, '-m', 'pdb', os_helper.TESTFN]
proc = subprocess.Popen(cmd,
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,
stderr=subprocess.STDOUT,
)
self.addCleanup(proc.stdout.close)
stdout, stderr = proc.communicate(b'quit\n')
self.assertNotIn(b'SyntaxError', stdout,
"Got a syntax error running test script under PDB")
def test_issue46434(self):
# Temporarily patch in an extra help command which doesn't have a
# docstring to emulate what happens in an embeddable distribution
script = """
def do_testcmdwithnodocs(self, arg):
pass
import pdb
pdb.Pdb.do_testcmdwithnodocs = do_testcmdwithnodocs
"""
commands = """
continue
help testcmdwithnodocs
"""
stdout, stderr = self.run_pdb_script(script, commands)
output = (stdout or '') + (stderr or '')
self.assertNotIn('AttributeError', output,
'Calling help on a command with no docs should be handled gracefully')
self.assertIn("*** No help for 'testcmdwithnodocs'; __doc__ string missing", output,
'Calling help on a command with no docs should print an error')
def test_issue13183(self):
script = """
from bar import bar
def foo():
bar()
def nope():
pass
def foobar():
foo()
nope()
foobar()
"""
commands = """
from bar import bar
break bar
continue
step
step
quit
"""
bar = """
def bar():
pass
"""
with open('bar.py', 'w') as f:
f.write(textwrap.dedent(bar))
self.addCleanup(os_helper.unlink, 'bar.py')
stdout, stderr = self.run_pdb_script(script, commands)
self.assertTrue(
any('main.py(5)foo()->None' in l for l in stdout.splitlines()),
'Fail to step into the caller after a return')
def test_issue13120(self):
# Invoking "continue" on a non-main thread triggered an exception
# inside signal.signal.
with open(os_helper.TESTFN, 'wb') as f:
f.write(textwrap.dedent("""
import threading
import pdb
def start_pdb():
pdb.Pdb(readrc=False).set_trace()
x = 1
y = 1
t = threading.Thread(target=start_pdb)
t.start()""").encode('ascii'))
cmd = [sys.executable, '-u', os_helper.TESTFN]
proc = subprocess.Popen(cmd,
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,
stderr=subprocess.STDOUT,
env={**os.environ, 'PYTHONIOENCODING': 'utf-8'}
)
self.addCleanup(proc.stdout.close)
stdout, stderr = proc.communicate(b'cont\n')
self.assertNotIn(b'Error', stdout,
"Got an error running test script under PDB")
def test_issue36250(self):
with open(os_helper.TESTFN, 'wb') as f:
f.write(textwrap.dedent("""
import threading
import pdb
evt = threading.Event()
def start_pdb():
evt.wait()
pdb.Pdb(readrc=False).set_trace()
t = threading.Thread(target=start_pdb)
t.start()
pdb.Pdb(readrc=False).set_trace()
evt.set()
t.join()""").encode('ascii'))
cmd = [sys.executable, '-u', os_helper.TESTFN]
proc = subprocess.Popen(cmd,
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,
stderr=subprocess.STDOUT,
env = {**os.environ, 'PYTHONIOENCODING': 'utf-8'}
)
self.addCleanup(proc.stdout.close)
stdout, stderr = proc.communicate(b'cont\ncont\n')
self.assertNotIn(b'Error', stdout,
"Got an error running test script under PDB")
def test_issue16180(self):
# A syntax error in the debuggee.
script = "def f: pass\n"
commands = ''
expected = "SyntaxError:"
stdout, stderr = self.run_pdb_script(
script, commands, expected_returncode=1
)
self.assertIn(expected, stdout,
'\n\nExpected:\n{}\nGot:\n{}\n'
'Fail to handle a syntax error in the debuggee.'
.format(expected, stdout))
def test_issue26053(self):
# run command of pdb prompt echoes the correct args
script = "print('hello')"
commands = """
continue
run a b c
run d e f
quit
"""
stdout, stderr = self.run_pdb_script(script, commands)
res = '\n'.join([x.strip() for x in stdout.splitlines()])
self.assertRegex(res, "Restarting .* with arguments:\na b c")
self.assertRegex(res, "Restarting .* with arguments:\nd e f")
def test_readrc_kwarg(self):
script = textwrap.dedent("""
import pdb; pdb.Pdb(readrc=False).set_trace()
print('hello')
""")
save_home = os.environ.pop('HOME', None)
try:
with os_helper.temp_cwd():
with open('.pdbrc', 'w') as f:
f.write("invalid\n")
with open('main.py', 'w') as f:
f.write(script)
cmd = [sys.executable, 'main.py']
proc = subprocess.Popen(
cmd,
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,
stderr=subprocess.PIPE,
)
with proc:
stdout, stderr = proc.communicate(b'q\n')
self.assertNotIn(b"NameError: name 'invalid' is not defined",
stdout)
finally:
if save_home is not None:
os.environ['HOME'] = save_home
def test_readrc_homedir(self):
save_home = os.environ.pop("HOME", None)
with os_helper.temp_dir() as temp_dir, patch("os.path.expanduser"):
rc_path = os.path.join(temp_dir, ".pdbrc")
os.path.expanduser.return_value = rc_path
try:
with open(rc_path, "w") as f:
f.write("invalid")
self.assertEqual(pdb.Pdb().rcLines[0], "invalid")
finally:
if save_home is not None:
os.environ["HOME"] = save_home
def test_read_pdbrc_with_ascii_encoding(self):
script = textwrap.dedent("""
import pdb; pdb.Pdb().set_trace()
print('hello')
""")
save_home = os.environ.pop('HOME', None)
try:
with os_helper.temp_cwd():
with open('.pdbrc', 'w', encoding='utf-8') as f:
f.write("Fran\u00E7ais")
with open('main.py', 'w', encoding='utf-8') as f:
f.write(script)
cmd = [sys.executable, 'main.py']
env = {'PYTHONIOENCODING': 'ascii'}
if sys.platform == 'win32':
env['PYTHONLEGACYWINDOWSSTDIO'] = 'non-empty-string'
proc = subprocess.Popen(
cmd,
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,
stderr=subprocess.PIPE,
env={**os.environ, **env}
)
with proc:
stdout, stderr = proc.communicate(b'c\n')
self.assertIn(b"UnicodeEncodeError: \'ascii\' codec can\'t encode character "
b"\'\\xe7\' in position 21: ordinal not in range(128)", stderr)
finally:
if save_home is not None:
os.environ['HOME'] = save_home
def test_header(self):
stdout = StringIO()
header = 'Nobody expects... blah, blah, blah'
with ExitStack() as resources:
resources.enter_context(patch('sys.stdout', stdout))
resources.enter_context(patch.object(pdb.Pdb, 'set_trace'))
pdb.set_trace(header=header)
self.assertEqual(stdout.getvalue(), header + '\n')
def test_run_module(self):
script = """print("SUCCESS")"""
commands = """
continue
quit
"""
stdout, stderr = self.run_pdb_module(script, commands)
self.assertTrue(any("SUCCESS" in l for l in stdout.splitlines()), stdout)
def test_module_is_run_as_main(self):
script = """
if __name__ == '__main__':
print("SUCCESS")
"""
commands = """
continue
quit
"""
stdout, stderr = self.run_pdb_module(script, commands)
self.assertTrue(any("SUCCESS" in l for l in stdout.splitlines()), stdout)
def test_breakpoint(self):
script = """
if __name__ == '__main__':
pass
print("SUCCESS")
pass
"""
commands = """
b 3
quit
"""
stdout, stderr = self.run_pdb_module(script, commands)
self.assertTrue(any("Breakpoint 1 at" in l for l in stdout.splitlines()), stdout)
self.assertTrue(all("SUCCESS" not in l for l in stdout.splitlines()), stdout)
def test_run_pdb_with_pdb(self):
commands = """
c
quit
"""
stdout, stderr = self._run_pdb(["-m", "pdb"], commands)
self.assertIn(
pdb._usage,
stdout.replace('\r', '') # remove \r for windows
)
def test_module_without_a_main(self):
module_name = 't_main'
os_helper.rmtree(module_name)
init_file = module_name + '/__init__.py'
os.mkdir(module_name)
with open(init_file, 'w'):
pass
self.addCleanup(os_helper.rmtree, module_name)
stdout, stderr = self._run_pdb(
['-m', module_name], "", expected_returncode=1
)
self.assertIn("ImportError: No module named t_main.__main__",
stdout.splitlines())
def test_package_without_a_main(self):
pkg_name = 't_pkg'
module_name = 't_main'
os_helper.rmtree(pkg_name)
modpath = pkg_name + '/' + module_name
os.makedirs(modpath)
with open(modpath + '/__init__.py', 'w'):
pass
self.addCleanup(os_helper.rmtree, pkg_name)
stdout, stderr = self._run_pdb(
['-m', modpath.replace('/', '.')], "", expected_returncode=1
)
self.assertIn(
"'t_pkg.t_main' is a package and cannot be directly executed",
stdout)
def test_blocks_at_first_code_line(self):
script = """
#This is a comment, on line 2
print("SUCCESS")
"""
commands = """
quit
"""
stdout, stderr = self.run_pdb_module(script, commands)
self.assertTrue(any("__main__.py(4)<module>()"
in l for l in stdout.splitlines()), stdout)
def test_relative_imports(self):
self.module_name = 't_main'
os_helper.rmtree(self.module_name)
main_file = self.module_name + '/__main__.py'
init_file = self.module_name + '/__init__.py'
module_file = self.module_name + '/module.py'
self.addCleanup(os_helper.rmtree, self.module_name)
os.mkdir(self.module_name)
with open(init_file, 'w') as f:
f.write(textwrap.dedent("""
top_var = "VAR from top"
"""))
with open(main_file, 'w') as f:
f.write(textwrap.dedent("""
from . import top_var
from .module import var
from . import module
pass # We'll stop here and print the vars
"""))
with open(module_file, 'w') as f:
f.write(textwrap.dedent("""
var = "VAR from module"
var2 = "second var"
"""))
commands = """
b 5
c
p top_var
p var
p module.var2
quit
"""
stdout, _ = self._run_pdb(['-m', self.module_name], commands)
self.assertTrue(any("VAR from module" in l for l in stdout.splitlines()), stdout)
self.assertTrue(any("VAR from top" in l for l in stdout.splitlines()))
self.assertTrue(any("second var" in l for l in stdout.splitlines()))
def test_relative_imports_on_plain_module(self):
# Validates running a plain module. See bpo32691
self.module_name = 't_main'
os_helper.rmtree(self.module_name)
main_file = self.module_name + '/runme.py'
init_file = self.module_name + '/__init__.py'
module_file = self.module_name + '/module.py'
self.addCleanup(os_helper.rmtree, self.module_name)
os.mkdir(self.module_name)
with open(init_file, 'w') as f:
f.write(textwrap.dedent("""
top_var = "VAR from top"
"""))
with open(main_file, 'w') as f:
f.write(textwrap.dedent("""
from . import module
pass # We'll stop here and print the vars
"""))
with open(module_file, 'w') as f:
f.write(textwrap.dedent("""
var = "VAR from module"
"""))
commands = """
b 3
c
p module.var
quit
"""
stdout, _ = self._run_pdb(['-m', self.module_name + '.runme'], commands)
self.assertTrue(any("VAR from module" in l for l in stdout.splitlines()), stdout)
def test_errors_in_command(self):
commands = "\n".join([
'print(]',
'debug print(',
'debug doesnotexist',
'c',
])
stdout, _ = self.run_pdb_script('pass', commands + '\n')
self.assertEqual(stdout.splitlines()[1:], [
'-> pass',
"(Pdb) *** SyntaxError: closing parenthesis ']' does not match opening "
"parenthesis '('",
'(Pdb) ENTERING RECURSIVE DEBUGGER',
'*** SyntaxError: \'(\' was never closed',
'LEAVING RECURSIVE DEBUGGER',
'(Pdb) ENTERING RECURSIVE DEBUGGER',
'> <string>(1)<module>()',
"((Pdb)) *** NameError: name 'doesnotexist' is not defined",
'LEAVING RECURSIVE DEBUGGER',
'(Pdb) ',
])
def test_issue34266(self):
'''do_run handles exceptions from parsing its arg'''
def check(bad_arg, msg):
commands = "\n".join([
f'run {bad_arg}',
'q',
])
stdout, _ = self.run_pdb_script('pass', commands + '\n')
self.assertEqual(stdout.splitlines()[1:], [
'-> pass',
f'(Pdb) *** Cannot run {bad_arg}: {msg}',
'(Pdb) ',
])
check('\\', 'No escaped character')
check('"', 'No closing quotation')
def test_issue42384(self):
'''When running `python foo.py` sys.path[0] is an absolute path. `python -m pdb foo.py` should behave the same'''
script = textwrap.dedent("""
import sys
print('sys.path[0] is', sys.path[0])
""")
commands = 'c\nq'
with os_helper.temp_cwd() as cwd:
expected = f'(Pdb) sys.path[0] is {os.path.realpath(cwd)}'
stdout, stderr = self.run_pdb_script(script, commands)
self.assertEqual(stdout.split('\n')[2].rstrip('\r'), expected)
@os_helper.skip_unless_symlink
def test_issue42384_symlink(self):
'''When running `python foo.py` sys.path[0] resolves symlinks. `python -m pdb foo.py` should behave the same'''
script = textwrap.dedent("""
import sys
print('sys.path[0] is', sys.path[0])
""")
commands = 'c\nq'
with os_helper.temp_cwd() as cwd:
cwd = os.path.realpath(cwd)
dir_one = os.path.join(cwd, 'dir_one')
dir_two = os.path.join(cwd, 'dir_two')
expected = f'(Pdb) sys.path[0] is {dir_one}'
os.mkdir(dir_one)
with open(os.path.join(dir_one, 'foo.py'), 'w') as f:
f.write(script)
os.mkdir(dir_two)
os.symlink(os.path.join(dir_one, 'foo.py'), os.path.join(dir_two, 'foo.py'))
stdout, stderr = self._run_pdb([os.path.join('dir_two', 'foo.py')], commands)
self.assertEqual(stdout.split('\n')[2].rstrip('\r'), expected)
def test_issue42383(self):
with os_helper.temp_cwd() as cwd:
with open('foo.py', 'w') as f:
s = textwrap.dedent("""
print('The correct file was executed')
import os
os.chdir("subdir")
""")
f.write(s)
subdir = os.path.join(cwd, 'subdir')
os.mkdir(subdir)
os.mkdir(os.path.join(subdir, 'subdir'))
wrong_file = os.path.join(subdir, 'foo.py')
with open(wrong_file, 'w') as f:
f.write('print("The wrong file was executed")')
stdout, stderr = self._run_pdb(['foo.py'], 'c\nc\nq')
expected = '(Pdb) The correct file was executed'
self.assertEqual(stdout.split('\n')[6].rstrip('\r'), expected)
def test_gh_94215_crash(self):
script = """\
def func():
def inner(v): pass
inner(
42
)
func()
"""
commands = textwrap.dedent("""
break func
continue
next
next
jump 2
""")
stdout, stderr = self.run_pdb_script(script, commands)
self.assertFalse(stderr)
def test_gh_93696_frozen_list(self):
frozen_src = """
def func():
x = "Sentinel string for gh-93696"
print(x)
"""
host_program = """
import os
import sys
def _create_fake_frozen_module():
with open('gh93696.py') as f:
src = f.read()
# this function has a co_filename as if it were in a frozen module
dummy_mod = compile(src, "<frozen gh93696>", "exec")
func_code = dummy_mod.co_consts[0]
mod = type(sys)("gh93696")
mod.func = type(lambda: None)(func_code, mod.__dict__)
mod.__file__ = 'gh93696.py'
return mod
mod = _create_fake_frozen_module()
mod.func()
"""
commands = """
break 20
continue
step
list
quit
"""
with open('gh93696.py', 'w') as f:
f.write(textwrap.dedent(frozen_src))
with open('gh93696_host.py', 'w') as f:
f.write(textwrap.dedent(host_program))
self.addCleanup(os_helper.unlink, 'gh93696.py')
self.addCleanup(os_helper.unlink, 'gh93696_host.py')
stdout, stderr = self._run_pdb(["gh93696_host.py"], commands)
# verify that pdb found the source of the "frozen" function
self.assertIn('x = "Sentinel string for gh-93696"', stdout, "Sentinel statement not found")
def test_non_utf8_encoding(self):
script_dir = os.path.join(os.path.dirname(__file__), 'encoded_modules')
for filename in os.listdir(script_dir):
if filename.endswith(".py"):
self._run_pdb([os.path.join(script_dir, filename)], 'q')
class ChecklineTests(unittest.TestCase):
def setUp(self):
linecache.clearcache() # Pdb.checkline() uses linecache.getline()
def tearDown(self):
os_helper.unlink(os_helper.TESTFN)
def test_checkline_before_debugging(self):
with open(os_helper.TESTFN, "w") as f:
f.write("print(123)")
db = pdb.Pdb()
self.assertEqual(db.checkline(os_helper.TESTFN, 1), 1)
def test_checkline_after_reset(self):
with open(os_helper.TESTFN, "w") as f:
f.write("print(123)")
db = pdb.Pdb()
db.reset()
self.assertEqual(db.checkline(os_helper.TESTFN, 1), 1)
def test_checkline_is_not_executable(self):
# Test for comments, docstrings and empty lines
s = textwrap.dedent("""
# Comment
\"\"\" docstring \"\"\"
''' docstring '''
""")
with open(os_helper.TESTFN, "w") as f:
f.write(s)
num_lines = len(s.splitlines()) + 2 # Test for EOF
with redirect_stdout(StringIO()):
db = pdb.Pdb()
for lineno in range(num_lines):
self.assertFalse(db.checkline(os_helper.TESTFN, lineno))
def load_tests(loader, tests, pattern):
from test import test_pdb
tests.addTest(doctest.DocTestSuite(test_pdb))
return tests
if __name__ == '__main__':
unittest.main()
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