Get some tests passing

Author: slozier

Src/IronPython/Runtime/DictionaryOps.cs

@@ -120,7 +120,11 @@ public static object setdefault(PythonDictionary self, object key, object defaul
 
         public static void update(CodeContext/*!*/ context, PythonDictionary/*!*/ self, object other) {
             if (other is PythonDictionary pyDict) {
-                pyDict._storage.CopyTo(ref self._storage);
+                if (pyDict.TreatAsMapping) {
+                    SlowUpdate(context, self, other);
+                } else {
+                    pyDict._storage.CopyTo(ref self._storage);
+                }
             } else {
                 SlowUpdate(context, self, other);
             }
@@ -129,7 +133,7 @@ public static void update(CodeContext/*!*/ context, PythonDictionary/*!*/ self,
         private static void SlowUpdate(CodeContext/*!*/ context, PythonDictionary/*!*/ self, object other) {
             if (other is MappingProxy proxy) {
                 update(context, self, proxy.GetDictionary(context));
-            } else if (other is IDictionary dict) {
+            } else if (other is IDictionary dict && other is not PythonDictionary) {
                 IDictionaryEnumerator e = dict.GetEnumerator();
                 while (e.MoveNext()) {
                     self._storage.Add(ref self._storage, e.Key, e.Value);

Src/IronPython/Runtime/Operations/PythonOps.cs

@@ -2607,6 +2607,8 @@ public static PythonDictionary UserMappingToPythonDictionary(CodeContext/*!*/ co
         }
 
         public static PythonDictionary CopyAndVerifyPythonDictionary(PythonFunction function, PythonDictionary dict) {
+            if (dict.TreatAsMapping) return CopyAndVerifyUserMapping(function, dict);
+
             if (dict._storage.HasNonStringAttributes()) {
                 throw TypeError("{0}() keywords must be strings", function.__name__);
             }

Src/IronPython/Runtime/PythonDictionary.cs

@@ -678,6 +678,11 @@ internal bool TryRemoveValue(object key, out object value) {
             return _storage.TryRemoveValue(ref _storage, key, out value);
         }
 
+        /// <summary>
+        /// If __iter__ is overridden then we should treat the dict as a mapping.
+        /// </summary>
+        internal bool TreatAsMapping => GetType() != typeof(PythonDictionary) && ((Func<object>)__iter__).Method.DeclaringType != typeof(PythonDictionary);
+
         #region Debugger View
 
         internal class DebugProxy {

Src/IronPythonTest/Cases/CPythonCasesManifest.ini

@@ -210,9 +210,6 @@ Ignore=true
 RunCondition=$(IS_DEBUG) # https://github.com/IronLanguages/ironpython3/issues/1067
 Timeout=600000 # 10 minute timeout
 
-[CPython.test_call] # IronPython.test_call_stdlib
-Ignore=true
-
 [CPython.test_capi]
 Ignore=true
 Reason=ImportError: No module named _testcapi

Tests/test_call_stdlib.py

@@ -43,10 +43,8 @@ def load_tests(loader, standard_tests, pattern):
         ]
 
         skip_tests = [
-            test.test_functools.TestLRUC('test_kwargs_order'), # intermittent failures - https://github.com/IronLanguages/ironpython3/issues/1460
             test.test_functools.TestLRUC('test_lru_cache_threaded2'), # intermittent failures
             test.test_functools.TestLRUC('test_lru_cache_threaded3'), # intermittent failures
-            test.test_functools.TestLRUPy('test_kwargs_order'), # intermittent failures - https://github.com/IronLanguages/ironpython3/issues/1460
             test.test_functools.TestLRUPy('test_lru_cache_threaded2'), # intermittent failures
             test.test_functools.TestLRUPy('test_lru_cache_threaded3'), # intermittent failures
             test.test_functools.TestPartialC('test_recursive_pickle'), # StackOverflowException