[Debug] Replaced logic for detecting filesystem case sensitivity #18126
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When I cloned the master branch onto a Virtualbox Vagrant OSX El Capitan host, Ubuntu Wily guest, the
Symfony\Component\Debug\Tests\DebugClassLoaderTest::testFileCaseMismatch
failed because 'Failed asserting that exception of type "\RuntimeException" is thrown'.@wouterj confirmed he got the same problem, and it's because Virtualbox shared folders aren't case sensitive, even when the guest is using a case sensitive filesystem. So I've replaced the logic that looked at the name of the operating system.
I ran the tests in the following environments:
NB - I didn't run it on native Windows (because I don't have easy access to one).