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78 lines
2.1 KiB
Python
78 lines
2.1 KiB
Python
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import contextlib
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import functools
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import io
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import re
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import sqlite3
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import test.support
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# Helper for temporary memory databases
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def memory_database(*args, **kwargs):
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cx = sqlite3.connect(":memory:", *args, **kwargs)
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return contextlib.closing(cx)
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# Temporarily limit a database connection parameter
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@contextlib.contextmanager
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def cx_limit(cx, category=sqlite3.SQLITE_LIMIT_SQL_LENGTH, limit=128):
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try:
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_prev = cx.setlimit(category, limit)
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yield limit
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finally:
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cx.setlimit(category, _prev)
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def with_tracebacks(exc, regex="", name=""):
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"""Convenience decorator for testing callback tracebacks."""
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def decorator(func):
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_regex = re.compile(regex) if regex else None
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@functools.wraps(func)
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def wrapper(self, *args, **kwargs):
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with test.support.catch_unraisable_exception() as cm:
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# First, run the test with traceback enabled.
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with check_tracebacks(self, cm, exc, _regex, name):
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func(self, *args, **kwargs)
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# Then run the test with traceback disabled.
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func(self, *args, **kwargs)
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return wrapper
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return decorator
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@contextlib.contextmanager
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def check_tracebacks(self, cm, exc, regex, obj_name):
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"""Convenience context manager for testing callback tracebacks."""
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sqlite3.enable_callback_tracebacks(True)
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try:
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buf = io.StringIO()
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with contextlib.redirect_stderr(buf):
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yield
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self.assertEqual(cm.unraisable.exc_type, exc)
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if regex:
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msg = str(cm.unraisable.exc_value)
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self.assertIsNotNone(regex.search(msg))
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if obj_name:
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self.assertEqual(cm.unraisable.object.__name__, obj_name)
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finally:
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sqlite3.enable_callback_tracebacks(False)
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class MemoryDatabaseMixin:
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def setUp(self):
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self.con = sqlite3.connect(":memory:")
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self.cur = self.con.cursor()
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def tearDown(self):
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self.cur.close()
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self.con.close()
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@property
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def cx(self):
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return self.con
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@property
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def cu(self):
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return self.cur
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