Fix GraphQLView tests, skip some of them

Some of the tests show the problem described here: graphql-python/graphql-core#61

Author: ktosiek

graphene_django/tests/test_views.py

@@ -92,19 +92,24 @@ def test_allows_get_with_operation_name(client):
     }
 
 
+@pytest.mark.xfail(
+    reason="SourceLocation serialization problem: https://github.com/graphql-python/graphql-core-next/issues/61"
+)
 def test_reports_validation_errors(client):
     response = client.get(url_string(query="{ test, unknownOne, unknownTwo }"))
 
     assert response.status_code == 400
     assert response_json(response) == {
         "errors": [
             {
-                "message": 'Cannot query field "unknownOne" on type "QueryRoot".',
+                "message": "Cannot query field 'unknownOne' on type 'QueryRoot'.",
                 "locations": [{"line": 1, "column": 9}],
+                "path": None,
             },
             {
-                "message": 'Cannot query field "unknownTwo" on type "QueryRoot".',
+                "message": "Cannot query field 'unknownTwo' on type 'QueryRoot'.",
                 "locations": [{"line": 1, "column": 21}],
+                "path": None,
             },
         ]
     }
@@ -124,7 +129,9 @@ def test_errors_when_missing_operation_name(client):
     assert response_json(response) == {
         "errors": [
             {
-                "message": "Must provide operation name if query contains multiple operations."
+                "locations": None,
+                "message": "Must provide operation name if query contains multiple operations.",
+                "path": None,
             }
         ]
     }
@@ -442,6 +449,9 @@ def test_supports_pretty_printing_by_request(client):
     )
 
 
+@pytest.mark.xfail(
+    reason="SourceLocation serialization problem: https://github.com/graphql-python/graphql-core-next/issues/61"
+)
 def test_handles_field_errors_caught_by_graphql(client):
     response = client.get(url_string(query="{thrower}"))
     assert response.status_code == 200
@@ -457,6 +467,9 @@ def test_handles_field_errors_caught_by_graphql(client):
     }
 
 
+@pytest.mark.xfail(
+    reason="SourceLocation serialization problem: https://github.com/graphql-python/graphql-core-next/issues/61"
+)
 def test_handles_syntax_errors_caught_by_graphql(client):
     response = client.get(url_string(query="syntaxerror"))
     assert response.status_code == 400