Unit tests for exception handling in MuranoPL

Change-Id: Idc7e83f3d8ce7c1e3dd763b751c9310f683ea465

murano/dsl/dsl_exception.py

@@ -20,7 +20,7 @@ import murano.dsl.yaql_functions as yaql_functions
 class MuranoPlException(Exception):
     def __init__(self, names, message, stacktrace, extra=None, cause=None):
         super(MuranoPlException, self).__init__(
-            '{0}: {1}'.format(names, message))
+            '[{0}]: {1}'.format(', '.join(names), message))
         if not isinstance(names, list):
             names = [names]
         self._names = names

murano/tests/dsl/meta/ExceptionHandling.yaml

@@ -0,0 +1,51 @@
+Name: ExceptionHandling
+
+Methods:
+  testThrow:
+    Arguments:
+      - enum:
+          Contract: $.int().notNull()
+    Body:
+      Try:
+        - trace('enter try')
+        - $.doThrow($enum)
+        - trace('exit try')
+      Catch:
+        - With: exceptionName
+          As: e
+          Do:
+            - trace($e.message)
+        - With: anotherExceptionName
+          As: e
+          Do:
+            - trace($e.message)
+            - trace(rethrow)
+            - Rethrow:
+        - As: e
+          Do:
+            - trace('catch all')
+            - trace($e.message)
+      Else:
+        - trace('else section')
+      Finally:
+        - trace('finally section')
+
+  doThrow:
+    Arguments:
+      - enum:
+          Contract: $.int().notNull()
+    Body:
+      - Match:
+          1:
+            - Throw: exceptionName
+              Message: exception message
+          2:
+            - Throw: anotherExceptionName
+              Message: exception message 2
+          3:
+            - Throw: thirdExceptionName
+              Message: exception message 3
+          4:
+            - Return:
+        Value: $enum
+

murano/tests/dsl/test_exceptions.py

@@ -0,0 +1,56 @@
+# Copyright (c) 2014 Mirantis, Inc.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from murano.dsl import dsl_exception
+from murano.tests.dsl.foundation import object_model as om
+from murano.tests.dsl.foundation import test_case
+
+
+class TestExceptions(test_case.DslTestCase):
+    def setUp(self):
+        super(TestExceptions, self).setUp()
+        self._runner = self.new_runner(om.Object('ExceptionHandling'))
+
+    def test_throw_catch(self):
+        self._runner.testThrow(1)
+        self.assertEqual(
+            ['enter try', u'exception message', 'finally section'],
+            self.traces)
+
+    def test_rethrow(self):
+        e = self.assertRaises(
+            dsl_exception.MuranoPlException,
+            self._runner.testThrow, 2)
+
+        self.assertEqual(['anotherExceptionName'], e.names)
+        self.assertEqual('exception message 2', e.message)
+        self.assertEqual('[anotherExceptionName]: exception message 2', str(e))
+
+        self.assertEqual(
+            ['enter try', 'exception message 2',
+             'rethrow', 'finally section'],
+            self.traces)
+
+    def test_catch_all_catch(self):
+        self._runner.testThrow(3)
+        self.assertEqual(
+            ['enter try', 'catch all',
+             'exception message 3', 'finally section'],
+            self.traces)
+
+    def test_no_throw(self):
+        self._runner.testThrow(4)
+        self.assertEqual(
+            ['enter try', 'exit try', 'else section', 'finally section'],
+            self.traces)