Infrastructure for test running and suites.
| Function | _clearSuite | Clear all tests from suite. | 
| Class | _PyUnitTestCaseAdapter | Adapt from pyunit.TestCase to ITestCase. | 
| Class | _BrokenIDTestCaseAdapter | Adapter for pyunit-style TestCasesubclasses that have 
undesirable id() methods. That isunittest.FunctionTestCaseandunittest.DocTestCase. | 
| Class | _ForceGarbageCollectionDecorator | Forces garbage collection to be run before and after the test. Any errors logged during the post-test collection are added to the test result as errors. | 
| Function | _iterateTests | Iterate through all of the test cases in testSuiteOrCase. |