Tip #1: Reset Global State
Something that makes testing with Magento quite difficult, is the liberal use of global state, in form of singletons and registry. They are not reset between tests, but EcomDev_PHPUnit allows explicit resetting with annotations.
/** * @singleton checkout/session * @helper tax * @registry current_product */ public function testSomething()
The parameters are the same as for
It is recommended to reset all singletons and registry values that are used during the test, not only after you get conflicts. Especially resetting used session singletons is important, regardless if they are mocked in the current test. Only for stateless helpers, i.e. those that don’t have own attributes, resetting is not necessary.