This commits changes WC_Unit_Test_Case parent class to WP_HTTP_TestCase (which extends WP_UnitTestCase). This way all WC core test classes can benefit from the functionality provided by WP_HTTP_TestCase if needed. This is necessary because otherwise test classes can use the functionality provided by WC_Unit_Test_Case or WP_HTTP_TestCase. This change should not affect test classes that don't explicitly call one of the WP_HTTP_TestCase features.
This commit fixes WC PHPUnit tests in PHP 5.2 that have been broken since commit e68084d7b8 (diff-b43983ff635e47e2ec510ae07726f0b4R30) was merged. The mentioned commit added a new method to WC_Unit_Test_Case that uses late static binding. The problem is that late static binding is available only since PHP 5.3 and WooCommerce still support PHP 5.2. Running WC tests with PHP 5.2 resulted in the following error:
Parse error: syntax error, unexpected T_STATIC, expecting T_STRING or T_VARIABLE or '$' in /home/travis/build/woocommerce/woocommerce/tests/framework/class-wc-unit-test-case.php on line 40 (see https://travis-ci.org/woocommerce/woocommerce/jobs/350303315#L281)
For now, I'm simply removing the method that used late static binding (WC_Unit_Test_Case::include_dependencies()) and manually loading the required dependencies in the two test classes that relied on it. I'm happy to add WC_Unit_Test_Case::include_dependencies() again if someone can find a way to make it compatible with PHP 5.2. If not, we can revisit this once WC drops support for PHP 5.2.
There are a number of files that are only loaded when another function is called (for example, load a reporting class when displaying a widget). An autoloader would be the ideal way to handle this (both in production and for tests), but until PHP compatibility is sorted out this commit adds an easy fix:
Testcases can now populate the protected, static $includes property with filepaths relative to the project root; when the testcase boots up, these files will automatically be included.
Rodrigo Primo
Mike Jolley
Steve Grunwell
ragulka
Aristeides Stathopoulos
Claudio Sanches
shivapoudel
Barry Kooij
Max Rice