Allow to skip unittests if --pdb active

closes #2137

CHANGELOG.rst

@@ -1,7 +1,8 @@
 3.0.7 (unreleased)
 =======================
 
-*
+* Fix regression, pytest now skips unittest correctly if run with ``--pdb``
+  (`#2137`_). Thanks to `@gst`_ for the report and `@mbyt`_ for the PR.
 
 *
 
@@ -9,6 +10,10 @@
 
 *
 
+.. _@gst: https://github.com/gst
+
+.. _#2137: https://github.com/pytest-dev/pytest/issues/2137
+
 
 3.0.6 (2017-01-22)
 ==================

_pytest/unittest.py

@@ -65,7 +65,6 @@ class UnitTestCase(pytest.Class):
                     yield TestCaseFunction('runTest', parent=self)
 
 
-
 class TestCaseFunction(pytest.Function):
     _excinfo = None
 
@@ -157,9 +156,20 @@ class TestCaseFunction(pytest.Function):
             self._testcase(result=self)
         else:
             # disables tearDown and cleanups for post mortem debugging (see #1890)
+            # but still implements the skipping machinery (see #2137)
+            testMethod = getattr(self._testcase, self._testcase._testMethodName)
+            if (getattr(self._testcase.__class__, "__unittest_skip__", False) or
+                getattr(testMethod, "__unittest_skip__", False)):
+                # If the class or method was skipped.
+                skip_why = (getattr(self._testcase.__class__, '__unittest_skip_why__', '')
+                            or getattr(testMethod, '__unittest_skip_why__', ''))
+                try:
+                    self._testcase._addSkip(self, self._testcase, skip_why)
+                except TypeError:  # PY2
+                    self._testcase._addSkip(self, skip_why)
+                return
             self._testcase.debug()
 
-
     def _prunetraceback(self, excinfo):
         pytest.Function._prunetraceback(self, excinfo)
         traceback = excinfo.traceback.filter(

testing/test_pdb.py

@@ -106,6 +106,20 @@ class TestPDB:
         assert 'debug.me' in rest
         self.flush(child)
 
+    def test_pdb_unittest_skip(self, testdir):
+        p1 = testdir.makepyfile("""
+            import unittest
+            @unittest.skipIf(True, 'Skipping also with pdb active')
+            class MyTestCase(unittest.TestCase):
+                def test_one(self):
+                    assert 0
+        """)
+        child = testdir.spawn_pytest("-rs --pdb %s" % p1)
+        child.expect('Skipping also with pdb active')
+        child.expect('1 skipped in')
+        child.sendeof()
+        self.flush(child)
+
     def test_pdb_interaction_capture(self, testdir):
         p1 = testdir.makepyfile("""
             def test_1():