Convert parsers test to pytest style (#898)

tests/conftest.py

@@ -1,4 +1,5 @@
 import pytest
+from rest_framework.test import APIClient
 
 from tests.models import (
     BasicModel,
@@ -51,3 +52,8 @@ def many_to_many_targets(db):
         ManyToManyTarget.objects.create(name="Target1"),
         ManyToManyTarget.objects.create(name="Target2"),
     ]
+
+
+@pytest.fixture
+def client():
+    return APIClient()

tests/test_parsers.py

@@ -0,0 +1,130 @@
+import json
+from io import BytesIO
+
+import pytest
+from rest_framework.exceptions import ParseError
+
+from rest_framework_json_api.parsers import JSONParser
+from rest_framework_json_api.utils import format_value
+from tests.views import BasicModelViewSet
+
+
+class TestJSONParser:
+    @pytest.fixture
+    def parser(self):
+        return JSONParser()
+
+    @pytest.fixture
+    def parse(self, parser, parser_context):
+        def parse_wrapper(data):
+            stream = BytesIO(json.dumps(data).encode("utf-8"))
+            return parser.parse(stream, None, parser_context)
+
+        return parse_wrapper
+
+    @pytest.fixture
+    def parser_context(self, rf):
+        return {"request": rf.post("/"), "kwargs": {}, "view": BasicModelViewSet()}
+
+    @pytest.mark.parametrize(
+        "format_field_names",
+        [
+            None,
+            "dasherize",
+            "camelize",
+            "capitalize",
+            "underscore",
+        ],
+    )
+    def test_parse_formats_field_names(
+        self,
+        settings,
+        format_field_names,
+        parse,
+    ):
+        settings.JSON_API_FORMAT_FIELD_NAMES = format_field_names
+
+        data = {
+            "data": {
+                "id": "123",
+                "type": "BasicModel",
+                "attributes": {
+                    format_value("test_attribute", format_field_names): "test-value"
+                },
+                "relationships": {
+                    format_value("test_relationship", format_field_names): {
+                        "data": {"type": "TestRelationship", "id": "123"}
+                    }
+                },
+            }
+        }
+
+        result = parse(data)
+        assert result == {
+            "id": "123",
+            "test_attribute": "test-value",
+            "test_relationship": {"id": "123", "type": "TestRelationship"},
+        }
+
+    def test_parse_extracts_meta(self, parse):
+        data = {
+            "data": {
+                "type": "BasicModel",
+            },
+            "meta": {"random_key": "random_value"},
+        }
+
+        result = parse(data)
+        assert result["_meta"] == data["meta"]
+
+    def test_parse_preserves_json_value_field_names(self, settings, parse):
+        settings.JSON_API_FORMAT_FIELD_NAMES = "dasherize"
+
+        data = {
+            "data": {
+                "type": "BasicModel",
+                "attributes": {"json-value": {"JsonKey": "JsonValue"}},
+            },
+        }
+
+        result = parse(data)
+        assert result["json_value"] == {"JsonKey": "JsonValue"}
+
+    def test_parse_raises_error_on_empty_data(self, parse):
+        data = []
+
+        with pytest.raises(ParseError) as excinfo:
+            parse(data)
+        assert "Received document does not contain primary data" == str(excinfo.value)
+
+    def test_parse_fails_on_list_of_objects(self, parse):
+        data = {
+            "data": [
+                {
+                    "type": "BasicModel",
+                    "attributes": {"json-value": {"JsonKey": "JsonValue"}},
+                }
+            ],
+        }
+
+        with pytest.raises(ParseError) as excinfo:
+            parse(data)
+
+        assert "Received data is not a valid JSONAPI Resource Identifier Object" == str(
+            excinfo.value
+        )
+
+    def test_parse_fails_when_id_is_missing_on_patch(self, rf, parse, parser_context):
+        parser_context["request"] = rf.patch("/")
+        data = {
+            "data": {
+                "type": "BasicModel",
+            },
+        }
+
+        with pytest.raises(ParseError) as excinfo:
+            parse(data)
+
+        assert "The resource identifier object must contain an 'id' member" == str(
+            excinfo.value
+        )

tests/test_relations.py

@@ -11,13 +11,14 @@
     SerializerMethodHyperlinkedRelatedField,
 )
 from rest_framework_json_api.utils import format_link_segment
-from rest_framework_json_api.views import ModelViewSet, RelationshipView
+from rest_framework_json_api.views import RelationshipView
 from tests.models import BasicModel
 from tests.serializers import (
     ForeignKeySourceSerializer,
     ManyToManySourceReadOnlySerializer,
     ManyToManySourceSerializer,
 )
+from tests.views import BasicModelViewSet
 
 
 @pytest.mark.django_db
@@ -266,11 +267,6 @@ def test_get_links(
 # Routing setup
 
 
-class BasicModelViewSet(ModelViewSet):
-    class Meta:
-        model = BasicModel
-
-
 class BasicModelRelationshipView(RelationshipView):
     queryset = BasicModel.objects