Add unit tests for BayModelManager.list() method

The BayModelManager.list() has already supported the pagination
and sorting features, but there is no unit case to cover
them. This patch tries to add some tests for them.

Change-Id: I6486d826c6a7e0d90e8833a9c9a7a6b57a67157c
Partial-Bug: #1559838

magnumclient/tests/v1/test_baymodels.py

@@ -112,6 +112,48 @@ fake_responses = {
             UPDATED_BAYMODEL,
         ),
     },
+    '/v1/baymodels/?limit=2':
+    {
+        'GET': (
+            {},
+            {'baymodels': [BAYMODEL1, BAYMODEL2]},
+        ),
+    },
+    '/v1/baymodels/?marker=%s' % BAYMODEL2['uuid']:
+    {
+        'GET': (
+            {},
+            {'baymodels': [BAYMODEL1, BAYMODEL2]},
+        ),
+    },
+    '/v1/baymodels/?limit=2&marker=%s' % BAYMODEL2['uuid']:
+    {
+        'GET': (
+            {},
+            {'baymodels': [BAYMODEL1, BAYMODEL2]},
+        ),
+    },
+    '/v1/baymodels/?sort_dir=asc':
+    {
+        'GET': (
+            {},
+            {'baymodels': [BAYMODEL1, BAYMODEL2]},
+        ),
+    },
+    '/v1/baymodels/?sort_key=uuid':
+    {
+        'GET': (
+            {},
+            {'baymodels': [BAYMODEL1, BAYMODEL2]},
+        ),
+    },
+    '/v1/baymodels/?sort_key=uuid&sort_dir=desc':
+    {
+        'GET': (
+            {},
+            {'baymodels': [BAYMODEL2, BAYMODEL1]},
+        ),
+    },
 }
 
 
@@ -130,6 +172,66 @@ class BayModelManagerTest(testtools.TestCase):
         self.assertEqual(expect, self.api.calls)
         self.assertThat(baymodels, matchers.HasLength(2))
 
+    def _test_baymode_list_with_fileters(
+            self, limit=None, marker=None,
+            sort_key=None, sort_dir=None,
+            detail=False, expect=[]):
+        baymodels_filter = self.mgr.list(limit=limit, marker=marker,
+                                         sort_key=sort_key,
+                                         sort_dir=sort_dir,
+                                         detail=detail)
+        self.assertEqual(expect, self.api.calls)
+        self.assertThat(baymodels_filter, matchers.HasLength(2))
+
+    def test_baymodel_list_with_limit(self):
+        expect = [
+            ('GET', '/v1/baymodels/?limit=2', {}, None),
+        ]
+        self._test_baymode_list_with_fileters(
+            limit=2,
+            expect=expect)
+
+    def test_baymodel_list_with_marker(self):
+        expect = [
+            ('GET', '/v1/baymodels/?marker=%s' % BAYMODEL2['uuid'], {}, None),
+        ]
+        self._test_baymode_list_with_fileters(
+            marker=BAYMODEL2['uuid'],
+            expect=expect)
+
+    def test_baymodel_list_with_marker_limit(self):
+        expect = [
+            ('GET', '/v1/baymodels/?limit=2&marker=%s' % BAYMODEL2['uuid'],
+             {}, None),
+        ]
+        self._test_baymode_list_with_fileters(
+            limit=2, marker=BAYMODEL2['uuid'],
+            expect=expect)
+
+    def test_baymodel_list_with_sort_dir(self):
+        expect = [
+            ('GET', '/v1/baymodels/?sort_dir=asc', {}, None),
+        ]
+        self._test_baymode_list_with_fileters(
+            sort_dir='asc',
+            expect=expect)
+
+    def test_baymodel_list_with_sort_key(self):
+        expect = [
+            ('GET', '/v1/baymodels/?sort_key=uuid', {}, None),
+        ]
+        self._test_baymode_list_with_fileters(
+            sort_key='uuid',
+            expect=expect)
+
+    def test_baymodel_list_with_sort_key_dir(self):
+        expect = [
+            ('GET', '/v1/baymodels/?sort_key=uuid&sort_dir=desc', {}, None),
+        ]
+        self._test_baymode_list_with_fileters(
+            sort_key='uuid', sort_dir='desc',
+            expect=expect)
+
     def test_baymodel_show_by_id(self):
         baymodel = self.mgr.get(BAYMODEL1['id'])
         expect = [