Assert equality.

It is simpler and produces understandable message in case of error.

master/bt5/vifib_slapos_rest_api_v1_test/TestTemplateItem/testVifibSlaposRestAPIV1.py

@@ -161,8 +161,7 @@ class TestInstanceRequest(VifibSlaposRestAPIV1Mixin):
     self.assertBasicResponse()
     self.assertResponseCode(400)
     self.assertResponseJson()
-    self.assertTrue('error' in self.json_response)
-    self.assertEqual("Data is not json object.", self.json_response['error'])
+    self.assertEqual({'error': "Data is not json object."}, self.json_response)
     self.assertPersonRequestSimulatorEmpty()
 
   def test_bad_json(self):
@@ -174,8 +173,7 @@ class TestInstanceRequest(VifibSlaposRestAPIV1Mixin):
     self.assertBasicResponse()
     self.assertResponseCode(400)
     self.assertResponseJson()
-    self.assertTrue('error' in self.json_response)
-    self.assertEqual("Data is not json object.", self.json_response['error'])
+    self.assertEqual({'error': "Data is not json object."}, self.json_response)
     self.assertPersonRequestSimulatorEmpty()
 
   def test_empty_json(self):
@@ -669,8 +667,7 @@ class TestInstancePOSTbang(VifibSlaposRestAPIV1BangMixin):
     self.assertBasicResponse()
     self.assertResponseCode(400)
     self.assertResponseJson()
-    self.assertTrue('error' in self.json_response)
-    self.assertEqual("Data is not json object.", self.json_response['error'])
+    self.assertEqual({'error': "Data is not json object."}, self.json_response)
     self.assertInstanceBangSimulatorEmpty()
 
   def test_bad_json(self):

master/bt5/vifib_slapos_rest_api_v1_test/bt/revision

-25
\ No newline at end of file
+26
\ No newline at end of file