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test_test_case_validation.py
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from test_case_validation import _CaseWrapper, \
get_failures, get_test_cases, get_doctest_dict
FAIL_IDENTIFIER = "_fails_"
PASS_IDENTIFIER = "_passes_"
def correct_function(x: int) -> int:
"""A buggy function within the same directory as the tests.
Return x.
>>> correct_function(1)
1
>>> correct_function(2)
2
>>> correct_function(3) == 3
True
"""
return x
class TestGetTestCases:
"""Tests for get_test_cases.
"""
def verify_test_results(self, test_cases: dict[str, _CaseWrapper]):
"""Verifies that all of the tests in test_cases run correctly and
produce the correct output (no results when a test passes, results when
it doesn't).
"""
checked_tests = 0
for testname in test_cases:
results = test_cases[testname].run()
if PASS_IDENTIFIER in testname:
checked_tests += 1
assert results == '', f'{testname} should have passed but failed.'
if FAIL_IDENTIFIER in testname:
checked_tests += 1
assert results, f'{testname} should have failed but passed.'
# One last check to make sure all tests were included
assert checked_tests == len(test_cases)
def test_pytest_only(self):
"""Test that the correct test cases are returned when only allowing
pytests.
"""
import example_tests
test_cases = get_test_cases(example_tests,
allow_pytest=True)
assert set(test_cases) == {'TestPytests.test_passes_external_buggy',
'TestPytests.test_passes_internal_buggy',
'TestPytests.test_fails_external_buggy',
'TestPytests.test_fails_internal_buggy',
'test_passes_external_buggy',
'test_passes_internal_buggy',
'test_fails_external_buggy',
'test_fails_internal_buggy',
'test_fails_external_hypothesis',
'test_fails_internal_hypothesis',
'test_fails_external_parametrize[1]',
'test_fails_external_parametrize[2]',
'test_fails_internal_parametrize[1]',
'test_fails_internal_parametrize[2]',
'test_passes_external_parametrize[0]',
'test_passes_internal_parametrize[0]'
}
def test_unittest_only(self):
"""Test that the correct test cases are returned when only allowing
unittests.
"""
import example_tests
test_cases = get_test_cases(example_tests,
allow_unittest=True)
assert set(test_cases) == {'TestUnittests.test_passes_external_buggy',
'TestUnittests.test_passes_internal_buggy',
'TestUnittests.test_fails_external_buggy',
'TestUnittests.test_fails_internal_buggy'
}
def test_pytest_and_unittest(self):
"""Test that the correct test cases are returned when allowing both
pytests and unittests.
"""
import example_tests
test_cases = get_test_cases(example_tests,
allow_pytest=True,
allow_unittest=True)
assert set(test_cases) == {'TestPytests.test_passes_external_buggy',
'TestPytests.test_passes_internal_buggy',
'TestPytests.test_fails_external_buggy',
'TestPytests.test_fails_internal_buggy',
'TestUnittests.test_passes_external_buggy',
'TestUnittests.test_passes_internal_buggy',
'TestUnittests.test_fails_external_buggy',
'TestUnittests.test_fails_internal_buggy',
'test_passes_external_buggy',
'test_passes_internal_buggy',
'test_fails_external_buggy',
'test_fails_internal_buggy',
'test_fails_external_hypothesis',
'test_fails_internal_hypothesis',
'test_fails_external_parametrize[1]',
'test_fails_external_parametrize[2]',
'test_fails_internal_parametrize[1]',
'test_fails_internal_parametrize[2]',
'test_passes_external_parametrize[0]',
'test_passes_internal_parametrize[0]'
}
def test_pytest_runs(self):
"""Test that the returned Pytest tests run correctly.
"""
import example_tests
test_cases = get_test_cases(example_tests,
allow_pytest=True)
self.verify_test_results(test_cases)
def test_unittest_runs(self):
"""Test that the returned Unittest tests run correctly.
"""
import example_tests
test_cases = get_test_cases(example_tests,
allow_unittest=True)
self.verify_test_results(test_cases)
class TestRunWithReplacements:
def test_replace_with_correct_internal(self):
"""Test that all tests pass when the buggy function is mocked and
replaced with a working (internal) version."""
from unittest.mock import patch
import example_tests
test_cases = get_test_cases(example_tests,
allow_pytest=True,
allow_unittest=True)
for test_name in test_cases:
if 'internal' in test_name:
assert test_cases[test_name].run(function_to_mock='example_tests.internal_buggy',
function_to_use=correct_function) == ''
def test_replace_with_correct_external(self):
"""Test that all tests pass when the buggy function is mocked and
replaced with a working (internal) version."""
from unittest.mock import patch
import example_tests
test_cases = get_test_cases(example_tests,
allow_pytest=True,
allow_unittest=True)
for test_name in test_cases:
if 'external' in test_name:
assert test_cases[test_name].run(module_to_replace='buggy_function',
module_to_use='correct_function') == ''
def test_replace_both(self):
"""Test that all tests pass when the buggy function is mocked and
replaced with a working (internal) version."""
from unittest.mock import patch
import example_tests
test_cases = get_test_cases(example_tests,
allow_pytest=True,
allow_unittest=True)
for test_name in test_cases:
assert test_cases[test_name].run(function_to_mock='example_tests.internal_buggy',
function_to_use=correct_function,
module_to_replace='buggy_function',
module_to_use='correct_function') == ''
class TestGetFailures:
def test_no_replacements(self):
"""Test that all tests pass when the buggy function is mocked and
replaced with a working (internal) version."""
import example_tests
test_cases = get_test_cases(example_tests,
allow_pytest=True,
allow_unittest=True)
actual = get_failures(test_cases)
assert actual == {'TestPytests.test_fails_external_buggy',
'TestPytests.test_fails_internal_buggy',
'TestUnittests.test_fails_external_buggy',
'TestUnittests.test_fails_internal_buggy',
'test_fails_external_buggy',
'test_fails_internal_buggy',
'test_fails_external_hypothesis',
'test_fails_internal_hypothesis',
'test_fails_external_parametrize[1]',
'test_fails_external_parametrize[2]',
'test_fails_internal_parametrize[1]',
'test_fails_internal_parametrize[2]'
}
def test_replace_with_correct_internal(self):
"""Test that all tests pass when the buggy function is mocked and
replaced with a working (internal) version."""
import example_tests
test_cases = get_test_cases(example_tests,
allow_pytest=True,
allow_unittest=True)
actual = get_failures(test_cases,
function_to_mock='example_tests.internal_buggy',
function_to_use=correct_function)
assert actual == {'TestPytests.test_fails_external_buggy',
'TestUnittests.test_fails_external_buggy',
'test_fails_external_buggy',
'test_fails_external_parametrize[1]',
'test_fails_external_parametrize[2]',
'test_fails_external_hypothesis',
}
def test_replace_with_correct_external(self):
"""Test that all tests pass when the buggy function is mocked and
replaced with a working (external) version."""
import example_tests
test_cases = get_test_cases(example_tests,
allow_pytest=True,
allow_unittest=True)
actual = get_failures(test_cases,
module_to_replace='buggy_function',
module_to_use='correct_function')
assert actual == {'TestPytests.test_fails_internal_buggy',
'TestUnittests.test_fails_internal_buggy',
'test_fails_internal_buggy',
'test_fails_internal_parametrize[1]',
'test_fails_internal_parametrize[2]',
'test_fails_internal_hypothesis'
}
def test_replace_both(self):
"""Test that all tests pass when the buggy function is mocked and
replaced with a working (external) version."""
import example_tests
test_cases = get_test_cases(example_tests,
allow_pytest=True,
allow_unittest=True)
actual = get_failures(test_cases,
function_to_mock='example_tests.internal_buggy',
function_to_use=correct_function,
module_to_replace='buggy_function',
module_to_use='correct_function')
assert actual == set()
class TestGetDoctestDict:
def test_get_doctest_dict(self):
"""Test that get_doctest_dict returns the correct dictionary.
"""
actual = get_doctest_dict(correct_function)
expected = {'correct_function(1)': '1',
'correct_function(2)': '2',
'correct_function(3) == 3': 'True'}
assert actual == expected