improve some tests and keep it working:

[Forestsoft-de]

Test/EnvironmentTest.php

• getInstance will not throw an exception if all tests are running.
• make set instance null possible and check for type magento_environtment.
• implement skipped Varien_Date tests.
  is it correct that %s property will be ignored? the test failed yet.

Implementation of ImageMagickTest will not work under windows because touch is an unix command.
check for environtment and skip these tests.

you should think about using of vfsStream for file system tests.

[magento-team]

@Forestsoft-de
Sebastian, thank you for valuable contribution. Let's dissect it and see what was done in result:

• dev/tests/unit/framework/Magento/Test/Environment.php and related tests. After careful inspection we decided to remove it at all. After this change the unit testing framework happens to not have any other classes, so we removed the framework as well. With this change the unit tests in Magento become implemented using "out of the box" features of PHPUnit.
• dev/tests/unit/testsuite/Varien/DateTest.php
  • Didn't accept contribution for convertZendToStrfTime(), because this method was eliminated during refactoring of calendar to jQuery. The change is stuck in one of development branches though, but we'll incorporate it into master branch in near future.
  • Accepted testFormatDate() as is -- thank you
• dev/tests/unit/testsuite/Varien/Image/Adapter/ImageMagickTest.php -- partially accepted your contribution and also refactored the test to not create any files in the first place.