Fix type hierarchy tests (#11)

* Remove covariant tests

* Fix type hierarchy tests to override the right method

* Remove DebuggerBreak

Author: davidwrighton

src/tests/Loader/classloader/StaticVirtualMethods/TypeHierarchy/Generator/Program.cs

@@ -139,7 +139,7 @@ public static IEnumerable<TestScenario> GetScenarios()
                                         foreach (string baseTypeInstantiationOnDerivedType in possibleBaseTypeInstantiationOnDerivedType)
                                         {
                                             string interfaceTypeInstantiationOnDerivedType = ApplyGenericSubstitution(interfaceTypeInstantiationOnBaseType, baseTypeInstantiationOnDerivedType);
-                                            string derivedTypeReturnType = ApplyGenericSubstitution(baseTypeReturnType, interfaceTypeInstantiationOnDerivedType);
+                                            string derivedTypeReturnType = ApplyGenericSubstitution(interfaceReturnType, interfaceTypeInstantiationOnDerivedType);
 
                                             List<string> possibleDerivedTypeInstantiation = new List<string>();
                                             if (derivedTypeGenericParams == "")
@@ -162,9 +162,8 @@ public static IEnumerable<TestScenario> GetScenarios()
                                                     if (baseTypeReturnType == "string")
                                                     {
                                                         covariantScenarios++;
-                                                        // This isn't a good place for extensive covariant return testing
-                                                        if ((covariantScenarios % 20) != 0)
-                                                            continue;
+                                                        // We decided covariant scenarios aren't supported
+                                                        continue;
                                                     }
                                                     yield return new TestScenario(scenarioIndex++,
                                                                                   interfaceReturnType,