mach: Warn and dispatch non-WPT tests for test-wpt

python/servo/testing_commands.py

@@ -337,6 +337,24 @@ def test_wpt_failure(self):
              parser=create_parser_wpt)
     def test_wpt(self, **kwargs):
         self.ensure_bootstrapped()
+        test_list = kwargs["test_list"]
+        if not test_list:
+            return self._test_wpt(**kwargs)
+        else:
+            # Paths specified on command line. Ensure they are WPT, re-dispatch otherwise.
+            all_wpt = True
+            for test_path in test_list:
+                suite = self.suite_for_path(test_path)
+                if "wpt" != suite:
+                    all_wpt = False
+                    print("Warning: %s is not a WPT test. Delegating to test-%s." % (test_path, suite))
+            if all_wpt:
+                return self._test_wpt(**kwargs)
+            else:
+                # Dispatch each test to the correct suite
+                Registrar.dispatch("test", context=self.context, params=test_list)
+
+    def _test_wpt(self, **kwargs):
         hosts_file_path = path.join(self.context.topdir, 'tests', 'wpt', 'hosts')
         os.environ["hosts_file_path"] = hosts_file_path
         run_file = path.abspath(path.join(self.context.topdir, "tests", "wpt", "run_wpt.py"))