test: Allow MULTILINE in SKIP/WARN SimpleTests detection

The built-in regexp requires re.MULTILINE to work the same way as before
(allowing the match to be everywhere and not just in the first line).

As for the existing ones I believe users would benefit from allowing
MULTILINE as well, but there might be slight change in behavior.
Signed-off-by: NLukáš Doktor <ldoktor@redhat.com>

avocado/core/test.py

@@ -1168,7 +1168,7 @@ class SimpleTest(Test):
             warn_msg = ("Test passed but there were warnings on %s during "
                         "execution. Check the log for details.")
             if regex is not None:
-                re_warn = re.compile(regex)
+                re_warn = re.compile(regex, re.MULTILINE)
                 if warn_location in ['all', 'stdout']:
                     if re_warn.search(result.stdout_text):
                         raise exceptions.TestWarn(warn_msg % 'stdout')
@@ -1178,7 +1178,7 @@ class SimpleTest(Test):
                         raise exceptions.TestWarn(warn_msg % 'stderr')
 
         if skip_regex is not None:
-            re_skip = re.compile(skip_regex)
+            re_skip = re.compile(skip_regex, re.MULTILINE)
             skip_msg = ("Test passed but %s indicates test was skipped. "
                         "Check the log for details.")
 

selftests/functional/test_basic.py

@@ -742,6 +742,8 @@ class RunnerSimpleTest(unittest.TestCase):
                       b'finish with warning)', result.stdout, result)
         self.assertIn(b'ERROR| Error message (ordinary message not changing '
                       b'the results)', result.stdout, result)
+        self.assertIn(b'Test passed but there were warnings', result.stdout,
+                      result)
 
     @unittest.skipIf(not GNU_ECHO_BINARY, "Uses echo as test")
     def test_fs_unfriendly_run(self):
@@ -859,7 +861,8 @@ class RunnerSimpleTestStatus(unittest.TestCase):
 
     def test_simpletest_status(self):
         warn_script = script.TemporaryScript('avocado_warn.sh',
-                                             "#!/bin/sh\necho WARN",
+                                             '#!/bin/sh\n'
+                                             'echo -e "\\n\\nWARN\\n"',
                                              'avocado_simpletest_'
                                              'functional')
         warn_script.save()