TestUtils/ConfigDouble: bug fix - always reset Config statics after use #612
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The PHPCS native `Config` class uses a number of static properties, which may be updated during tests. These were previously reset to their default values in the `UtilityMethodTestCase::resetTestFile()` method, but this reset was inadvertently removed in commit 4f0f9a4 with the reasoning that, if all tests use the `ConfigDouble`, the reset would no longer be needed as the `ConfigDouble` resets on being initialized. The flaw in this logic is that not all tests are guaranteed to use the `ConfigDouble`, which means that without the reset, the `Config` class may be left "dirty" after tests using the `ConfigDouble`, which could break tests. This commit fixes this issue by: * Adding a `__destruct()` method to the `ConfigDouble` class which will reset the static properties on the PHPCS native `Config` class whenever an object created from this class is destroyed. * Explicitly calling the `__destruct()` method from the `UtilityMethodTestCase::resetTestFile()` method to ensure it is always run after a test has finished ("after class"), even if there would still be a lingering reference to the object. Includes tests for the new `__destruct()` method. Includes an additional test for the `UtilityMethodTestCase` class to ensure this snafu cannot come back without tests failing on it.
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The PHPCS native
Configclass uses a number of static properties, which may be updated during tests. These were previously reset to their default values in theUtilityMethodTestCase::resetTestFile()method, but this reset was inadvertently removed in commit 4f0f9a4 with the reasoning that, if all tests use theConfigDouble, the reset would no longer be needed as theConfigDoubleresets on being initialized.The flaw in this logic is that not all tests are guaranteed to use the
ConfigDouble, which means that without the reset, theConfigclass may be left "dirty" after tests using theConfigDouble, which could break tests.This commit fixes this issue by:
__destruct()method to theConfigDoubleclass which will reset the static properties on the PHPCS nativeConfigclass whenever an object created from this class is destroyed.__destruct()method from theUtilityMethodTestCase::resetTestFile()method to ensure it is always run after a test has finished ("after class"), even if there would still be a lingering reference to the object.Includes tests for the new
__destruct()method.Includes an additional test for the
UtilityMethodTestCaseclass to ensure this snafu cannot come back without tests failing on it.Props to @fredden for helping me debug this issue.