[testlib] Handle skip methods as in unittest

Just copied this piece of code from unittest.TestCase.run which:

* makes it possible to skip whole TestCase (using class decorator),
* handle conditional skip (skipIf).

As an aside, with this, setUp() is not executed anymore when a test is
skipped.

Closes #252838.

2 files changed, 12 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 0560fef..5406478 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,8 @@ ChangeLog for logilab.common
 --
    * shellutils: restore py 2.5 compat by removing usage of class decorator
    * pytest: drop broken --coverage option
+   * testlib: support for skipping whole test class and conditional skip, don't
+     run setUp for skipped tests
    * configuration: load options in config file order (#185648)
 
 2014-03-07  --  0.62.0
diff --git a/testlib.py b/testlib.py
index 817149c..683c7ac 100644
--- a/testlib.py
+++ b/testlib.py
@@ -579,6 +579,16 @@ class TestCase(unittest.TestCase):
         # if result.cvg:
         #     result.cvg.start()
         testMethod = self._get_test_method()
+        if (getattr(self.__class__, "__unittest_skip__", False) or
+            getattr(testMethod, "__unittest_skip__", False)):
+            # If the class or method was skipped.
+            try:
+                skip_why = (getattr(self.__class__, '__unittest_skip_why__', '')
+                            or getattr(testMethod, '__unittest_skip_why__', ''))
+                self._addSkip(result, skip_why)
+            finally:
+                result.stopTest(self)
+            return
         if runcondition and not runcondition(testMethod):
             return # test is skipped
         result.startTest(self)