Test cases don't run under PHPUnit 6 and greater

[blackshadowshade]

I'm currently trying to bring my development stack up to date and I stumbled across this message when attempting to run unit tests:

Class "PHPUnit_Framework_TestCase" not found

This occurs because I installed PHPUnit 11.4.3, and because namespacing was implemented in PHPUnit6.

According to https://stackoverflow.com/questions/6065730/why-fatal-error-class-phpunit-framework-testcase-not-found-in, the solution is

You will need to refactor things like \PHPUnit_Framework_TestCase to \PHPUnit\Framework\TestCase

I thought I would note this here because we'll probably be wanting to upgrade at some stage and this problem will need to be addressed.

[blackshadowshade]

Just noting that PHPUnit version is reasonably closely linked to PHP version:

https://phpunit.de/supported-versions.html