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329 lines
11 KiB
Python
329 lines
11 KiB
Python
'''Test functions and SearchEngine class in SearchEngine.py.'''
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# With mock replacements, the module does not use any gui widgets.
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# The use of tk.Text is avoided (for now, until mock Text is improved)
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# by patching instances with an index function returning what is needed.
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# This works because mock Text.get does not use .index.
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import re
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import unittest
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from test.support import requires
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from tkinter import BooleanVar, StringVar, TclError # ,Tk, Text
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import tkinter.messagebox as tkMessageBox
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from idlelib import SearchEngine as se
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from idlelib.idle_test.mock_tk import Var, Mbox
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from idlelib.idle_test.mock_tk import Text as mockText
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def setUpModule():
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# Replace s-e module tkinter imports other than non-gui TclError.
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se.BooleanVar = Var
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se.StringVar = Var
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se.tkMessageBox = Mbox
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def tearDownModule():
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# Restore 'just in case', though other tests should also replace.
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se.BooleanVar = BooleanVar
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se.StringVar = StringVar
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se.tkMessageBox = tkMessageBox
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class Mock:
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def __init__(self, *args, **kwargs): pass
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class GetTest(unittest.TestCase):
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# SearchEngine.get returns singleton created & saved on first call.
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def test_get(self):
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saved_Engine = se.SearchEngine
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se.SearchEngine = Mock # monkey-patch class
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try:
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root = Mock()
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engine = se.get(root)
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self.assertIsInstance(engine, se.SearchEngine)
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self.assertIs(root._searchengine, engine)
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self.assertIs(se.get(root), engine)
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finally:
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se.SearchEngine = saved_Engine # restore class to module
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class GetLineColTest(unittest.TestCase):
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# Test simple text-independent helper function
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def test_get_line_col(self):
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self.assertEqual(se.get_line_col('1.0'), (1, 0))
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self.assertEqual(se.get_line_col('1.11'), (1, 11))
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self.assertRaises(ValueError, se.get_line_col, ('1.0 lineend'))
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self.assertRaises(ValueError, se.get_line_col, ('end'))
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class GetSelectionTest(unittest.TestCase):
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# Test text-dependent helper function.
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## # Need gui for text.index('sel.first/sel.last/insert').
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## @classmethod
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## def setUpClass(cls):
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## requires('gui')
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## cls.root = Tk()
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##
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## @classmethod
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## def tearDownClass(cls):
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## cls.root.destroy()
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## del cls.root
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def test_get_selection(self):
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# text = Text(master=self.root)
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text = mockText()
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text.insert('1.0', 'Hello World!')
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# fix text.index result when called in get_selection
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def sel(s):
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# select entire text, cursor irrelevant
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if s == 'sel.first': return '1.0'
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if s == 'sel.last': return '1.12'
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raise TclError
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text.index = sel # replaces .tag_add('sel', '1.0, '1.12')
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self.assertEqual(se.get_selection(text), ('1.0', '1.12'))
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def mark(s):
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# no selection, cursor after 'Hello'
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if s == 'insert': return '1.5'
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raise TclError
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text.index = mark # replaces .mark_set('insert', '1.5')
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self.assertEqual(se.get_selection(text), ('1.5', '1.5'))
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class ReverseSearchTest(unittest.TestCase):
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# Test helper function that searches backwards within a line.
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def test_search_reverse(self):
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Equal = self.assertEqual
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line = "Here is an 'is' test text."
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prog = re.compile('is')
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Equal(se.search_reverse(prog, line, len(line)).span(), (12, 14))
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Equal(se.search_reverse(prog, line, 14).span(), (12, 14))
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Equal(se.search_reverse(prog, line, 13).span(), (5, 7))
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Equal(se.search_reverse(prog, line, 7).span(), (5, 7))
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Equal(se.search_reverse(prog, line, 6), None)
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class SearchEngineTest(unittest.TestCase):
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# Test class methods that do not use Text widget.
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def setUp(self):
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self.engine = se.SearchEngine(root=None)
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# Engine.root is only used to create error message boxes.
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# The mock replacement ignores the root argument.
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def test_is_get(self):
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engine = self.engine
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Equal = self.assertEqual
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Equal(engine.getpat(), '')
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engine.setpat('hello')
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Equal(engine.getpat(), 'hello')
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Equal(engine.isre(), False)
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engine.revar.set(1)
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Equal(engine.isre(), True)
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Equal(engine.iscase(), False)
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engine.casevar.set(1)
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Equal(engine.iscase(), True)
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Equal(engine.isword(), False)
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engine.wordvar.set(1)
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Equal(engine.isword(), True)
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Equal(engine.iswrap(), True)
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engine.wrapvar.set(0)
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Equal(engine.iswrap(), False)
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Equal(engine.isback(), False)
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engine.backvar.set(1)
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Equal(engine.isback(), True)
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def test_setcookedpat(self):
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engine = self.engine
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engine.setcookedpat('\s')
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self.assertEqual(engine.getpat(), '\s')
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engine.revar.set(1)
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engine.setcookedpat('\s')
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self.assertEqual(engine.getpat(), r'\\s')
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def test_getcookedpat(self):
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engine = self.engine
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Equal = self.assertEqual
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Equal(engine.getcookedpat(), '')
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engine.setpat('hello')
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Equal(engine.getcookedpat(), 'hello')
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engine.wordvar.set(True)
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Equal(engine.getcookedpat(), r'\bhello\b')
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engine.wordvar.set(False)
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engine.setpat('\s')
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Equal(engine.getcookedpat(), r'\\s')
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engine.revar.set(True)
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Equal(engine.getcookedpat(), '\s')
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def test_getprog(self):
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engine = self.engine
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Equal = self.assertEqual
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engine.setpat('Hello')
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temppat = engine.getprog()
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Equal(temppat.pattern, re.compile('Hello', re.IGNORECASE).pattern)
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engine.casevar.set(1)
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temppat = engine.getprog()
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Equal(temppat.pattern, re.compile('Hello').pattern, 0)
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engine.setpat('')
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Equal(engine.getprog(), None)
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engine.setpat('+')
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engine.revar.set(1)
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Equal(engine.getprog(), None)
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self.assertEqual(Mbox.showerror.message,
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'Error: nothing to repeat at position 0\nPattern: +')
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def test_report_error(self):
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showerror = Mbox.showerror
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Equal = self.assertEqual
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pat = '[a-z'
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msg = 'unexpected end of regular expression'
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Equal(self.engine.report_error(pat, msg), None)
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Equal(showerror.title, 'Regular expression error')
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expected_message = ("Error: " + msg + "\nPattern: [a-z")
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Equal(showerror.message, expected_message)
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Equal(self.engine.report_error(pat, msg, 5), None)
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Equal(showerror.title, 'Regular expression error')
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expected_message += "\nOffset: 5"
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Equal(showerror.message, expected_message)
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class SearchTest(unittest.TestCase):
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# Test that search_text makes right call to right method.
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@classmethod
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def setUpClass(cls):
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## requires('gui')
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## cls.root = Tk()
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## cls.text = Text(master=cls.root)
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cls.text = mockText()
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test_text = (
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'First line\n'
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'Line with target\n'
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'Last line\n')
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cls.text.insert('1.0', test_text)
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cls.pat = re.compile('target')
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cls.engine = se.SearchEngine(None)
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cls.engine.search_forward = lambda *args: ('f', args)
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cls.engine.search_backward = lambda *args: ('b', args)
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## @classmethod
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## def tearDownClass(cls):
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## cls.root.destroy()
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## del cls.root
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def test_search(self):
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Equal = self.assertEqual
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engine = self.engine
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search = engine.search_text
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text = self.text
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pat = self.pat
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engine.patvar.set(None)
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#engine.revar.set(pat)
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Equal(search(text), None)
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def mark(s):
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# no selection, cursor after 'Hello'
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if s == 'insert': return '1.5'
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raise TclError
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text.index = mark
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Equal(search(text, pat), ('f', (text, pat, 1, 5, True, False)))
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engine.wrapvar.set(False)
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Equal(search(text, pat), ('f', (text, pat, 1, 5, False, False)))
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engine.wrapvar.set(True)
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engine.backvar.set(True)
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Equal(search(text, pat), ('b', (text, pat, 1, 5, True, False)))
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engine.backvar.set(False)
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def sel(s):
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if s == 'sel.first': return '2.10'
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if s == 'sel.last': return '2.16'
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raise TclError
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text.index = sel
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Equal(search(text, pat), ('f', (text, pat, 2, 16, True, False)))
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Equal(search(text, pat, True), ('f', (text, pat, 2, 10, True, True)))
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engine.backvar.set(True)
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Equal(search(text, pat), ('b', (text, pat, 2, 10, True, False)))
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Equal(search(text, pat, True), ('b', (text, pat, 2, 16, True, True)))
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class ForwardBackwardTest(unittest.TestCase):
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# Test that search_forward method finds the target.
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## @classmethod
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## def tearDownClass(cls):
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## cls.root.destroy()
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## del cls.root
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@classmethod
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def setUpClass(cls):
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cls.engine = se.SearchEngine(None)
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## requires('gui')
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## cls.root = Tk()
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## cls.text = Text(master=cls.root)
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cls.text = mockText()
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# search_backward calls index('end-1c')
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cls.text.index = lambda index: '4.0'
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test_text = (
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'First line\n'
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'Line with target\n'
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'Last line\n')
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cls.text.insert('1.0', test_text)
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cls.pat = re.compile('target')
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cls.res = (2, (10, 16)) # line, slice indexes of 'target'
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cls.failpat = re.compile('xyz') # not in text
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cls.emptypat = re.compile('\w*') # empty match possible
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def make_search(self, func):
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def search(pat, line, col, wrap, ok=0):
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res = func(self.text, pat, line, col, wrap, ok)
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# res is (line, matchobject) or None
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return (res[0], res[1].span()) if res else res
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return search
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def test_search_forward(self):
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# search for non-empty match
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Equal = self.assertEqual
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forward = self.make_search(self.engine.search_forward)
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pat = self.pat
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Equal(forward(pat, 1, 0, True), self.res)
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Equal(forward(pat, 3, 0, True), self.res) # wrap
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Equal(forward(pat, 3, 0, False), None) # no wrap
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Equal(forward(pat, 2, 10, False), self.res)
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Equal(forward(self.failpat, 1, 0, True), None)
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Equal(forward(self.emptypat, 2, 9, True, ok=True), (2, (9, 9)))
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#Equal(forward(self.emptypat, 2, 9, True), self.res)
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# While the initial empty match is correctly ignored, skipping
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# the rest of the line and returning (3, (0,4)) seems buggy - tjr.
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Equal(forward(self.emptypat, 2, 10, True), self.res)
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def test_search_backward(self):
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# search for non-empty match
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Equal = self.assertEqual
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backward = self.make_search(self.engine.search_backward)
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pat = self.pat
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Equal(backward(pat, 3, 5, True), self.res)
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Equal(backward(pat, 2, 0, True), self.res) # wrap
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Equal(backward(pat, 2, 0, False), None) # no wrap
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Equal(backward(pat, 2, 16, False), self.res)
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Equal(backward(self.failpat, 3, 9, True), None)
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Equal(backward(self.emptypat, 2, 10, True, ok=True), (2, (9,9)))
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# Accepted because 9 < 10, not because ok=True.
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# It is not clear that ok=True is useful going back - tjr
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Equal(backward(self.emptypat, 2, 9, True), (2, (5, 9)))
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if __name__ == '__main__':
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unittest.main(verbosity=2, exit=2)
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