- Fix SkipLayers class in cases where the distribution specifies a

  ``test_suite`` value.

CHANGES.rst

@@ -4,7 +4,8 @@ zope.testrunner Changelog
 4.3.2 (unreleased)
 ==================
 
-- Nothing changed yet.
+- Fix ``SkipLayers`` class in cases where the distribution specifies a
+  ``test_suite`` value.
 
 
 4.3.1 (2013-03-02)

src/zope/testrunner/eggsupport.py

@@ -52,7 +52,13 @@ class SkipLayers(ScanningLoader):
       )
     """
     def loadTestsFromModule(self, module):
-        return skipLayers(ScanningLoader.loadTestsFromModule(self, module))
+        return skipLayers(
+            ScanningLoader.loadTestsFromModule(self, module))
+
+    def loadTestsFromNames(self, testNames, module):
+        return skipLayers(
+            ScanningLoader.loadTestsFromNames(self, testNames, module))
+
 
 def print_usage():
     print('python setup.py ftest')

src/zope/testrunner/testrunner-eggsupport.txt

@@ -107,3 +107,27 @@ Now we can retrieve the modules from the layer skipping loader:
 Cleanup:
 
   >>> ScanningLoader.loadTestsFromModule = orig_loadTestsFromModule
+
+When the distribution specified a ``test_suite``, another method is used to
+load the tests.
+
+  >>> orig_loadTestsFromNames = ScanningLoader.loadTestsFromNames
+  >>> ScanningLoader.loadTestsFromNames = lambda *args: all
+
+Now we can retrieve the modules from the layer skipping loader:
+
+  >>> from zope.testrunner.eggsupport import SkipLayers
+  >>> filtered = SkipLayers().loadTestsFromNames(
+  ...     'zope.testrunner.tests.test_suite', 'zope.testrunner')
+
+  >>> len(filtered._tests)
+  3
+  >>> from pprint import pprint
+  >>> pprint(filtered._tests)
+  [<...T1 testMethod=test_t1>,
+   StartUpFailure (zope.testrunner.find),
+   .../zope/testrunner/testrunner.txt]
+
+Cleanup:
+
+  >>> ScanningLoader.loadTestsFromNames = orig_loadTestsFromNames