common: tests for operations

circle/common/operations.py

@@ -44,8 +44,7 @@ class Operation(object):
         # check for unexpected keyword arguments
         argspec = getargspec(self._operation)
         if argspec.keywords is None:  # _operation doesn't take ** args
-            unexpected_kwargs = set(arg for arg in auxargs
-                                    if arg not in argspec.args)
+            unexpected_kwargs = set(auxargs) - set(argspec.args)
             if unexpected_kwargs:
                 raise TypeError("Operation got unexpected keyword arguments: "
                                 "%s" % ", ".join(unexpected_kwargs))

circle/common/tests/test_operations.py

@@ -58,3 +58,41 @@ class OperationTestCase(TestCase):
                     patch.object(Operation, 'create_activity'), \
                     patch.object(Operation, '_exec_op'):
                 op.call(system=True)
+
+    def test_no_exception_for_more_arguments_when_operation_takes_kwargs(self):
+        class KwargOp(Operation):
+            activity_code_suffix = 'test'
+            id = 'test'
+
+            def _operation(self, **kwargs):
+                pass
+
+        op = KwargOp(MagicMock())
+        with patch.object(KwargOp, 'create_activity'), \
+                patch.object(KwargOp, '_exec_op'):
+            op.call(system=True, foo=42)
+
+    def test_exception_for_unexpected_arguments(self):
+        class TestOp(Operation):
+            activity_code_suffix = 'test'
+            id = 'test'
+
+            def _operation(self):
+                pass
+
+        op = TestOp(MagicMock())
+        with patch.object(TestOp, 'create_activity'), \
+                patch.object(TestOp, '_exec_op'):
+            self.assertRaises(TypeError, op.call, system=True, foo=42)
+
+    def test_exception_for_missing_arguments(self):
+        class TestOp(Operation):
+            activity_code_suffix = 'test'
+            id = 'test'
+
+            def _operation(self, foo):
+                pass
+
+        op = TestOp(MagicMock())
+        with patch.object(TestOp, 'create_activity'):
+            self.assertRaises(TypeError, op.call, system=True)