tests: Properly label and detect unexpected successes

Unexpected successes were being labeled as failures, which might be
related to [1]. This behaviour is indeed welcome - we want to detect if
tests are unexpectedly succeeding via test pipeline failures, however,
the current implementation of the simpletap did not properly implement
this.

[1] https://bugs.python.org/issue20165

test/problems

@@ -56,7 +56,7 @@ if __name__ == "__main__":
     timestamp = re.compile("^# (\d+(?:\.\d+)?) ==>.*$")
 
     expected_fail = re.compile(r"^not ok.*?#\s*TODO", re.I)
-    unexpected_pass = re.compile(r"^ok .*?#\s*TODO", re.I)
+    unexpected_pass = re.compile(r"^not ok .*?#\s*FIXED", re.I)
     skip = re.compile(r"^ok .*?#\s*skip", re.I)
     ok = re.compile(r"^ok ", re.I)
     not_ok = re.compile(r"^not ok", re.I)

test/simpletap/__init__.py

@@ -162,6 +162,10 @@ class TAPTestResult(unittest.result.TestResult):
                 self.stream.writeln("{0} {1} - {2}: {3} # TODO".format(
                     color("not ok", "yellow"), self.testsRun, filename, desc)
                 )
+            elif status == "UNEXPECTED_SUCCESS":
+                self.stream.writeln("{0} {1} - {2}: {3} # FIXED".format(
+                    color("not ok", "yellow"), self.testsRun, filename, desc)
+                )
             else:
                 self.stream.writeln("{0} {1} - {2}: {3}".format(
                     color("not ok", "red"), self.testsRun, filename, desc)