Template to demonstrate properties override

Test template to provide an example of how to overrride TOSCA normative
type properties in custom type.

Change-Id: I91d1a9170d47f8313c24b194ad264898830a87c4

toscaparser/tests/data/test_normative_type_properties_override.yaml

@@ -0,0 +1,37 @@
+tosca_definitions_version: tosca_simple_yaml_1_0
+
+description: >
+  Test template for deploying a server with custom properties for image,
+  flavor and key_name. This template provides an example of how to
+  override TOSCA normative type's  (e.g. Compute) properties. Here new
+  properties are injected in the tosca.nodes.myserver which derives from
+  tosca.nodes.Compute. Note that tosca.nodes.myserver can not be a name of
+  another normative type (e.g. tosca.nodes.WebServer or tosca.nodes.nfv.VDU)
+  because that will create conflict while resolving type definition by the
+  TOSCA Parser.
+
+node_types:
+  tosca.nodes.myserver:
+    derived_from: tosca.nodes.Compute
+    properties:
+      key_name:
+        type: string
+      image:
+        type: string
+      flavor:
+        type: string
+
+topology_template:
+  inputs:
+    key_name:
+      type: string
+      default: inputkey
+
+  node_templates:
+    my_server:
+      type: tosca.nodes.myserver
+      properties:
+        flavor: m1.medium
+        image: rhel-6.5-test-image
+        key_name:
+          get_input: key_name

toscaparser/tests/test_toscatplvalidation.py

@@ -1776,3 +1776,9 @@ heat-translator/master/translator/tests/data/custom_types/wordpress.yaml
         '''
         self.assertIsNone(
             self._single_node_template_content_test(tpl_snippet3))
+
+    def test_properties_override_with_flavor_and_image(self):
+        tpl_path = os.path.join(
+            os.path.dirname(os.path.abspath(__file__)),
+            "data/test_normative_type_properties_override.yaml")
+        self.assertIsNotNone(ToscaTemplate(tpl_path))