Also run simplesetup01 in regular unittests.

As it turns out, "simplesetup01" is not simple. It is the only real
test we have to port from README.txt. In next step we can disable
README.txt if no working zope.app.testing is installed.

src/z3c/testsetup/tests/test_samples.py

@@ -8,6 +8,7 @@
 
 
 CAVE_PATH = os.path.join(os.path.dirname(__file__), 'cave')
+OTHER_CAVE_PATH = os.path.join(os.path.dirname(__file__), 'othercave')
 LAYERED_CAVE_PATH = os.path.join(os.path.dirname(__file__), 'layered_cave')
 GOT_WORKING_ZOPE_APP_TESTING = got_working_zope_app_testing()
 
@@ -207,6 +208,21 @@ def test_layeredsetup01(self):
         assert "Total: 4 tests, 0 failures, 0 errors and 0 skipped" in (
             cap.out)
 
+    def test_simplesetup01(self):
+        # we can run sample simplesetup01 from othercave.
+        defaults = [
+            '--path', OTHER_CAVE_PATH,
+            '--tests-pattern', '^simplesetup01$',
+        ]
+        with Capture() as cap:
+            testrunner.run(defaults)
+        assert "Running testSetUp of UnitLayer1" in cap.out
+        assert "Running testSetUp of UnitLayer2" in cap.out
+        assert "Running testTearDown of UnitLayer2" in cap.out
+        assert "Running testTearDown of UnitLayer1" in cap.out
+        assert "Total: 10 tests, 0 failures, 0 errors and 0 skipped" in (
+                cap.out)
+
 
 def tests_from_testcase(test_case):
     return unittest.defaultTestLoader.loadTestsFromTestCase(test_case)