SCM Inventory model, view, and task system changes

Inventory source file-type combined with a linked project
will allow the inventory source to be updated when the
project is updated. The inventory update runs in the
post-run hook of the project update.

awx/main/tests/functional/test_tasks.py

@@ -0,0 +1,43 @@
+import pytest
+import mock
+import os
+
+from awx.main.tasks import RunProjectUpdate, RunInventoryUpdate
+from awx.main.models import ProjectUpdate, InventoryUpdate
+
+
+@pytest.fixture
+def scm_revision_file(tmpdir_factory):
+    # Returns path to temporary testing revision file
+    revision_file = tmpdir_factory.mktemp('revisions').join('revision.txt')
+    with open(str(revision_file), 'w') as f:
+        f.write('1234567890123456789012345678901234567890')
+    return os.path.join(revision_file.dirname, 'revision.txt')
+
+
+@pytest.mark.django_db
+class TestDependentInventoryUpdate:
+
+    def test_dependent_inventory_updates_is_called(self, scm_inventory_source, scm_revision_file):
+        task = RunProjectUpdate()
+        task.revision_path = scm_revision_file
+        proj_update = ProjectUpdate.objects.create(project=scm_inventory_source.scm_project)
+        with mock.patch.object(RunProjectUpdate, '_update_dependent_inventories') as inv_update_mck:
+            task.post_run_hook(proj_update, 'successful')
+            inv_update_mck.assert_called_once_with(scm_inventory_source.scm_project, mock.ANY)
+
+    def test_no_unwanted_dependent_inventory_updates(self, project, scm_revision_file):
+        task = RunProjectUpdate()
+        task.revision_path = scm_revision_file
+        proj_update = ProjectUpdate.objects.create(project=project)
+        with mock.patch.object(RunProjectUpdate, '_update_dependent_inventories') as inv_update_mck:
+            task.post_run_hook(proj_update, 'successful')
+            assert not inv_update_mck.called
+
+    def test_dependent_inventory_updates(self, scm_inventory_source):
+        task = RunProjectUpdate()
+        with mock.patch.object(RunInventoryUpdate, 'run') as iu_run_mock:
+            task._update_dependent_inventories(scm_inventory_source.scm_project, [scm_inventory_source])
+            assert InventoryUpdate.objects.count() == 1
+            inv_update = InventoryUpdate.objects.first()
+            iu_run_mock.assert_called_once_with(inv_update.id)