> PHPUnit 8.0.0 introduced a `void` return type declaration to the "fixture" methods – `setUpBeforeClass()`, `setUp()`, `tearDown()` and `tearDownAfterClass()`. As the `void` return type was not introduced until PHP 7.1, this makes it more difficult to create cross-version compatible tests when using fixtures, due to signature mismatches.
>
> The `Yoast\PHPUnitPolyfills\TestCases\TestCase` overcomes the signature mismatch by having two versions. The correct one will be loaded depending on the PHPUnit version being used.
>
> When using this TestCase, if an individual test, or another TestCase which extends this TestCase, needs to overload any of the "fixture" methods, it should do so by using a snake_case variant of the original fixture method name, i.e. `set_up_before_class()`, `set_up()`, `assert_pre_conditions()`, `assert_post_conditions()`, `tear_down()`, and `tear_down_after_class()`.
>
> The snake_case methods will automatically be called by PHPUnit.
>
> > IMPORTANT: The snake_case methods should not call the PHPUnit parent, i.e. do not use `parent::setUp()` from within an overloaded `set_up()` method. If necessary, DO call `parent::set_up()`.
Reference: https://github.com/Yoast/PHPUnit-Polyfills#testcases
This commit:
* Lets the `PHPUnit_Adapter_TestCase` extend the `Yoast\PHPUnitPolyfills\TestCases\TestCase`, which makes this solution for the `void` return type available to the WordPress test suite.
* Removes the individual import and trait `use` statements for the Polyfill traits. These are no longer necessary as the `Yoast\PHPUnitPolyfills\TestCases\TestCase` already includes those.
Follow-up to [51559-51566].
Props jrf, hellofromTonya, johnbillion, netweb, SergeyBiryukov.
See #46149.
git-svn-id: https://develop.svn.wordpress.org/trunk@51567 602fd350-edb4-49c9-b593-d223f7449a82
As things were, the inheritance order of the abstract test classes was as follows:
{{{
WP_UnitTestCase (PHPUnit adapter layer)
extends WP_UnitTestCase_Base (base test class)
extends PHPUnit\Framework\TestCase (PHPUnit native class)
}}}
Concrete (child) test classes, as well as more specific abstract TestCases, are/were expected to extend the `WP_UnitTestCase`.
This order is not optimal as it means that the `WP_UnitTestCase_Base` class would not be able to benefit from any polyfills and/or shims in the PHPUnit adapter layer.
With that in mind, this commit changes the inheritance to:
{{{
WP_UnitTestCase (empty class, left in place to not break BC for plugin/theme integration tests)
extends WP_UnitTestCase_Base (base test class)
extends PHPUnit_Adapter_TestCase (PHPUnit adapter layer)
extends PHPUnit\Framework\TestCase (PHPUnit native class)
}}}
The new order allows for the `WP_UnitTestCase_Base` to also benefit from the PHPUnit adapter layer.
For backward compatibility reasons the `WP_UnitTestCase`, which all test classes are (were) expected to extend, is left in place, though it is now an empty class and explicitly `abstract`.
Follow-up to [51559], [51560].
Props jrf, hellofromTonya, johnbillion, netweb, SergeyBiryukov.
See #46149.
git-svn-id: https://develop.svn.wordpress.org/trunk@51561 602fd350-edb4-49c9-b593-d223f7449a82
