Could not invoke static methods from Python

Static method were handled incorrectly when
called from Python because of incorrect
method receiver.

Change-Id: Id7ef2bc0c74154bd3ac6ef7dcf8fa807a4be757b
Closes-Bug: #1596613

murano/dsl/executor.py

@@ -91,7 +91,9 @@ class MuranoDslExecutor(object):
                     'Method {0} cannot be called on receiver {1}'.format(
                         method, this))
 
-            return stub(yaql_engine, method_context, this.real_this)(
+            real_this = this.real_this if isinstance(
+                this, dsl_types.MuranoObject) else this.get_reference()
+            return stub(yaql_engine, method_context, real_this)(
                 *args, **kwargs)
 
         if context[constants.CTX_ACTIONS_ONLY] and not method.is_action:

murano/tests/unit/dsl/foundation/runner.py

@@ -20,6 +20,7 @@ import six
 from murano.dsl import context_manager
 from murano.dsl import dsl
 from murano.dsl import dsl_exception
+from murano.dsl import dsl_types
 from murano.dsl import executor
 from murano.dsl import helpers
 from murano.dsl import murano_object
@@ -49,22 +50,27 @@ class Runner(object):
     class DslObjectWrapper(object):
         def __init__(self, obj, runner):
             self._runner = runner
-            if isinstance(obj, six.string_types):
-                self._object_id = obj
+            if isinstance(obj, six.string_types + (dsl_types.MuranoType,)):
+                pass
             elif isinstance(obj, (object_model.Object, object_model.Ref)):
-                self._object_id = obj.id
+                obj = obj.id
             elif isinstance(obj, murano_object.MuranoObject):
-                self._object_id = obj.object_id
+                obj = obj.object_id
             else:
                 raise ValueError(
-                    'obj must be object ID string, MuranoObject or one of '
-                    'object_model helper classes (Object, Ref)')
+                    'obj must be object ID string, MuranoObject, MuranoType '
+                    'or one of object_model helper classes (Object, Ref)')
+            if isinstance(obj, six.string_types):
+                self._receiver = runner.executor.object_store.get(obj)
+            else:
+                self._receiver = obj
+
             self._preserve_exception = False
 
         def __getattr__(self, item):
             def call(*args, **kwargs):
                 return self._runner._execute(
-                    item, self._object_id, *args, **kwargs)
+                    item, self._receiver, *args, **kwargs)
             if item.startswith('test'):
                 return call
 
@@ -80,8 +86,7 @@ class Runner(object):
             execution_session.ExecutionSession())
         self._root = self.executor.load(model).object
 
-    def _execute(self, name, object_id, *args, **kwargs):
-        obj = self.executor.object_store.get(object_id)
+    def _execute(self, name, obj, *args, **kwargs):
         try:
             final_args = []
             final_kwargs = {}
@@ -93,9 +98,10 @@ class Runner(object):
                 if isinstance(arg, object_model.Object):
                     arg = object_model.build_model(arg)
                 final_kwargs[name] = arg
-            runtime_version = obj.type.package.runtime_version
+            cls = obj if isinstance(obj, dsl_types.MuranoType) else obj.type
+            runtime_version = cls.package.runtime_version
             yaql_engine = yaql_integration.choose_yaql_engine(runtime_version)
-            return dsl.to_mutable(obj.type.invoke(
+            return dsl.to_mutable(cls.invoke(
                 name, self.executor, obj, tuple(final_args), final_kwargs),
                 yaql_engine)
         except dsl_exception.MuranoPlException as e:
@@ -118,6 +124,12 @@ class Runner(object):
     def on(self, obj):
         return Runner.DslObjectWrapper(obj, self)
 
+    def on_class(self, class_name):
+        cls = self.executor.package_loader.load_class_package(
+            class_name, helpers.parse_version_spec(None)).find_class(
+            class_name, False)
+        return Runner.DslObjectWrapper(cls, self)
+
     @property
     def root(self):
         return self._root

murano/tests/unit/dsl/foundation/test_package_loader.py

@@ -100,7 +100,7 @@ class TestPackageLoader(package_loader.MuranoPackageLoader):
             for name, method in six.iteritems(data.get('Methods') or data.get(
                     'Workflow') or {}):
                 if name.startswith('test'):
-                    method['Usage'] = 'Action'
+                    method['Scope'] = 'Public'
 
             ns = namespace_resolver.NamespaceResolver(last_ns)
             class_name = ns.resolve_name(data['Name'])

murano/tests/unit/dsl/meta/TestStatics.yaml

@@ -235,3 +235,8 @@ Methods:
         - :TestStatics.classmethodPythonMethod('!')
         - ns:TestStatics.classmethodPythonMethod('!')
         - type('test.TestStatics').classmethodPythonMethod('!')
+
+  testStaticAction:
+    Usage: Static
+    Body:
+      Return: 'It works!'

murano/tests/unit/dsl/test_statics.py

@@ -143,3 +143,8 @@ class TestStatics(test_case.DslTestCase):
         self.assertRaises(
             yaql_exceptions.NoMatchingMethodException,
             self._runner.testCallStaticMethodOnInvalidClass)
+
+    def test_static_method_callable_from_python(self):
+        self.assertEqual(
+            'It works!',
+            self._runner.on_class('test.TestStatics').testStaticAction())