Import testtools as well, required for subunit.

lib/subunit/python/testtools/utils.py

@@ -0,0 +1,39 @@
+# Copyright (c) 2008 Jonathan M. Lange. See LICENSE for details.
+
+"""Utilities for dealing with stuff in unittest."""
+
+
+import sys
+
+__metaclass__ = type
+__all__ = [
+    'iterate_tests',
+    ]
+
+
+if sys.version_info > (3, 0):
+    def _u(s):
+        """Replacement for u'some string' in Python 3."""
+        return s
+    def _b(s):
+        """A byte literal."""
+        return s.encode("latin-1")
+    advance_iterator = next
+else:
+    def _u(s):
+        return unicode(s, "latin-1")
+    def _b(s):
+        return s
+    advance_iterator = lambda it: it.next()
+
+
+def iterate_tests(test_suite_or_case):
+    """Iterate through all of the test cases in `test_suite_or_case`."""
+    try:
+        suite = iter(test_suite_or_case)
+    except TypeError:
+        yield test_suite_or_case
+    else:
+        for test in suite:
+            for subtest in iterate_tests(test):
+                yield subtest