Fix EP building if app doesn't have files in template

Change-Id: Ie4148562db1521969729791a6198761f85f47c36
Closes-Bug: #1435331

murano/engine/system/agent.py

@@ -237,7 +237,7 @@ class Agent(murano_object.MuranoObject):
                 script['EntryPoint'] = self._place_file(
                     scripts_folder, script['EntryPoint'],
                     template, files, resources)
-            scripts_files = script['Files']
+            scripts_files = script.get('Files', [])
             script['Files'] = []
             for file in scripts_files:
                 file_id = self._place_file(scripts_folder, file,

murano/tests/unit/engine/system/execution_plans/application_without_files.template

@@ -0,0 +1,18 @@
+FormatVersion: 2.0.0
+Version: 1.0.0
+Name: Deploy Tomcat
+
+Parameters:
+  appName: $appName
+
+Body: |
+  return deploy(args.appName).stdout
+
+Scripts:
+  deploy:
+    Type: Application
+    Version: 1.0.0
+    EntryPoint: deployTomcat.sh
+    Options:
+      captureStdout: true
+      captureStderr: true

murano/tests/unit/engine/system/test_agent.py

@@ -78,6 +78,13 @@ class TestExecutionPlan(base.MuranoTestCase):
         template = self.agent.buildExecutionPlan(template, self.resources)
         self.assertEqual(template, self._get_telnet_application())
 
+    def test_execution_plan_v2_app_without_files(self):
+        template = yamllib.load(
+            self._read('application_without_files.template'),
+            Loader=self.yaml_loader)
+        template = self.agent.buildExecutionPlan(template, self.resources)
+        self.assertEqual(template, self._get_app_without_files())
+
     def _get_application(self):
         return {
             'Action': 'Execute',
@@ -123,6 +130,38 @@ class TestExecutionPlan(base.MuranoTestCase):
             'Version': '1.0.0'
         }
 
+    def _get_app_without_files(self):
+        return {
+            'Action': 'Execute',
+            'Body': 'return deploy(args.appName).stdout\n',
+            'Files': {
+                self.uuids[1]: {
+                    'Body': 'text',
+                    'BodyType': 'Text',
+                    'Name': 'deployTomcat.sh'
+                },
+            },
+            'FormatVersion': '2.0.0',
+            'ID': self.uuids[0],
+            'Name': 'Deploy Tomcat',
+            'Parameters': {
+                'appName': '$appName'
+            },
+            'Scripts': {
+                'deploy': {
+                    'EntryPoint': self.uuids[1],
+                    'Files': [],
+                    'Options': {
+                        'captureStderr': True,
+                        'captureStdout': True
+                    },
+                    'Type': 'Application',
+                    'Version': '1.0.0'
+                }
+            },
+            'Version': '1.0.0'
+        }
+
     def _get_chef(self):
         return {
             'Action': 'Execute',