Why I\'m getting this PHP error?
Fatal error: Class \'PHPUnit_Framework_TestCase\' not found in ...
You may get this error because you namespaced the file. If so you will need to specify that PHPUnit_Framework_TestCase is in the global namespace by preceding it with a backslash:
namespace AcmeInc\MyApplication\Tests
class StackTest extends \PHPUnit_Framework_TestCase {}
I submitted a crude PR to start conversation for correcting the documentation.