- Fail tests of unknown parsers are now reported as failure!

DHParser/testing.py

@@ -389,6 +389,8 @@ def grammar_unit(test_unit, parser_factory, transformer_factory, report=True, ve
             except UnknownParserError as upe:
                 node = Node(ZOMBIE_PARSER, "").init_pos(0)
                 cst = RootNode(node).new_error(node, str(upe))
+                errata.append('Unknown parser {} in fail test {}!'.format(parser_name, test_name))
+                tests.setdefault('__err__', {})[test_name] = errata[-1]
             if not is_error(cst.error_flag):
                 errata.append('Fail test "%s" for parser "%s" yields match instead of '
                               'expected failure!' % (test_name, parser_name))

test/test_testing.py

@@ -214,7 +214,7 @@ class TestGrammarTest:
         trans_fac = lambda : ARITHMETIC_EBNFTransform
         # reset_unit(self.cases)
         errata = grammar_unit(self.cases, parser_fac, trans_fac)
-        assert not errata, str(errata)
+        assert errata, "Unknown parser, but no error message!?"
         report = get_report(self.cases)
         assert report.find('### CST') >= 0
         errata = grammar_unit(self.failure_cases, parser_fac, trans_fac)
@@ -231,6 +231,17 @@ class TestGrammarTest:
     #     report = get_report(self.cases)
     #     assert report.find('### CST') >= 0
 
+    def test_fail_failtest(self):
+        """Failure test should not pass if it failed because the parser is unknown."""
+        fcases = {}
+        fcases['berm'] = {}
+        fcases['berm']['fail'] = self.failure_cases['term']['fail']
+        errata = grammar_unit(fcases,
+                              grammar_provider(ARITHMETIC_EBNF),
+                              lambda : ARITHMETIC_EBNFTransform)
+        assert errata
+
+
 
 class TestSExpr:
     """