Increase unit test coverage for muranodashboard Categories Views.

Created categories sub-folder in muranodashboard.tests.unit and
added this test file under it.

implements bp: murano-unit-test-coverage

Change-Id: I5cfc09fb725ea48c7c2f97ed391bdf695657912a

muranodashboard/tests/unit/categories/test_views.py

@@ -0,0 +1,131 @@
+# Copyright (c) 2016 AT&T 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.
+
+import mock
+import testtools
+
+from muranodashboard.categories import tables
+from muranodashboard.categories import views
+
+
+class TestCategoriesView(testtools.TestCase):
+
+    def setUp(self):
+        super(TestCategoriesView, self).setUp()
+
+        self.categories_view = views.CategoriesView()
+        self.categories_view._prev = False
+        self.categories_view._more = False
+
+        mock_request = mock.Mock()
+        mock_request.session = {'horizon_pagesize': 2}
+        self.categories_view.request = mock_request
+
+        self.assertEqual(tables.CategoriesTable,
+                         self.categories_view.table_class)
+        self.assertEqual('categories/index.html',
+                         self.categories_view.template_name)
+        self.assertEqual('Application Categories',
+                         self.categories_view.page_title)
+
+    def test_has_prev_data(self):
+        self.assertFalse(self.categories_view.has_prev_data(None))
+
+    def test_has_more_data(self):
+        self.assertFalse(self.categories_view.has_more_data(None))
+
+    @mock.patch.object(views, 'api', autospec=True)
+    def test_get_data(self, mock_api):
+        """Test that get_data works."""
+        mock_client = mock_api.muranoclient(mock.Mock())
+        mock_client.categories.list.return_value = [
+            'foo_cat', 'bar_cat'
+        ]
+        self.categories_view.request.GET.get.return_value = 'foo_marker'
+
+        result = self.categories_view.get_data()
+
+        expected_categories = ['bar_cat', 'foo_cat']
+        expected_kwargs = {
+            'filters': {},
+            'marker': 'foo_marker',
+            'sort_dir': 'asc',
+            'limit': 3
+        }
+
+        self.assertEqual(expected_categories, result)
+        self.assertTrue(self.categories_view.has_more_data(None))
+        self.assertFalse(self.categories_view.has_prev_data(None))
+        self.categories_view.request.GET.get.assert_called_once_with(
+            tables.CategoriesTable._meta.prev_pagination_param, None)
+        mock_client.categories.list.assert_called_once_with(
+            **expected_kwargs)
+
+    @mock.patch.object(views, 'api', autospec=True)
+    def test_get_data_with_more_results(self, mock_api):
+        """Test that get_data with pagesize smaller than result size works."""
+        mock_client = mock_api.muranoclient(mock.Mock())
+        mock_client.categories.list.return_value = [
+            'foo_cat', 'bar_cat', 'baz_cat'
+        ]
+        self.categories_view.request.GET.get.return_value = 'foo_marker'
+
+        result = self.categories_view.get_data()
+
+        # Only two results should have been returned, with categories reversed.
+        expected_categories = ['bar_cat', 'foo_cat']
+        expected_kwargs = {
+            'filters': {},
+            'marker': 'foo_marker',
+            'sort_dir': 'asc',
+            'limit': 3
+        }
+
+        self.assertEqual(expected_categories, result)
+        self.assertTrue(self.categories_view.has_more_data(None))
+        self.assertTrue(self.categories_view.has_prev_data(None))
+        self.categories_view.request.GET.get.assert_called_once_with(
+            tables.CategoriesTable._meta.prev_pagination_param, None)
+        mock_client.categories.list.assert_called_once_with(
+            **expected_kwargs)
+
+    @mock.patch.object(views, 'api', autospec=True)
+    def test_get_data_with_desc_sort_dir(self, mock_api):
+        """Test that get_data with sort_dir = 'desc' works."""
+        mock_client = mock_api.muranoclient(mock.Mock())
+        mock_client.categories.list.return_value = [
+            'foo_cat', 'bar_cat'
+        ]
+        self.categories_view.request.GET.get.side_effect = [None, 'bar_marker']
+
+        result = self.categories_view.get_data()
+
+        expected_categories = ['foo_cat', 'bar_cat']
+        expected_kwargs = {
+            'filters': {},
+            'marker': 'bar_marker',
+            'sort_dir': 'desc',
+            'limit': 3
+        }
+
+        self.assertEqual(expected_categories, result)
+        self.assertFalse(self.categories_view.has_more_data(None))
+        self.assertTrue(self.categories_view.has_prev_data(None))
+        self.categories_view.request.GET.get.assert_has_calls([
+            mock.call(tables.CategoriesTable._meta.prev_pagination_param,
+                      None),
+            mock.call(tables.CategoriesTable._meta.pagination_param, None)
+        ])
+        mock_client.categories.list.assert_called_once_with(
+            **expected_kwargs)