Add ordering schema tests

tests/test_ordering_schema.py

@@ -0,0 +1,85 @@
+import pytest
+from django.db.models import QuerySet
+
+from ninja import OrderingSchema
+
+
+class FakeQS(QuerySet):
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        self.is_ordered = False
+
+    def order_by(self, *args, **kwargs):
+        self.is_ordered = True
+        self.order_by_args = args
+        self.order_by_kwargs = kwargs
+        return self
+
+
+def test_validate_order_by_field__should_pass_when_all_field_allowed():
+    test_field = "test_field"
+
+    class DummyOrderingSchema(OrderingSchema):
+        pass
+
+    order_by_value = [test_field]
+    validation_result = DummyOrderingSchema.validate_order_by_field(order_by_value)
+    assert validation_result == order_by_value
+
+
+def test_validate_order_by_field__should_pass_when_value_in_allowed_fields_and_asc():
+    test_field = "test_field"
+
+    class DummyOrderingSchema(OrderingSchema):
+        class Config(OrderingSchema.Config):
+            allowed_fields = [test_field]
+
+    order_by_value = [test_field]
+    validation_result = DummyOrderingSchema.validate_order_by_field(order_by_value)
+    assert validation_result == order_by_value
+
+
+def test_validate_order_by_field__should_pass_when_value_in_allowed_fields_and_desc():
+    test_field = "test_field"
+
+    class DummyOrderingSchema(OrderingSchema):
+        class Config(OrderingSchema.Config):
+            allowed_fields = [test_field]
+
+    order_by_value = [f"-{test_field}"]
+    validation_result = DummyOrderingSchema.validate_order_by_field(order_by_value)
+    assert validation_result == order_by_value
+
+
+def test_validate_order_by_field__should_raise_validation_error_when_value_asc_not_in_allowed_fields():
+    test_field = "allowed_field"
+
+    class DummyOrderingSchema(OrderingSchema):
+        class Config(OrderingSchema.Config):
+            allowed_fields = [test_field]
+
+    order_by_value = ["not_allowed_field"]
+    with pytest.raises(ValueError):
+        DummyOrderingSchema.validate_order_by_field(order_by_value)
+
+
+def test_validate_order_by_field__should_raise_validation_error_when_value_desc_not_in_allowed_fields():
+    test_field = "allowed_field"
+
+    class DummyOrderingSchema(OrderingSchema):
+        class Config(OrderingSchema.Config):
+            allowed_fields = [test_field]
+
+    order_by_value = ["-not_allowed_field"]
+    with pytest.raises(ValueError):
+        DummyOrderingSchema.validate_order_by_field(order_by_value)
+
+
+def test_sort__should_call_order_by_on_queryset_with_expected_args():
+    order_by_value = ["test_field_1", "-test_field_2"]
+    ordering_schema = OrderingSchema(order_by=order_by_value)
+
+    queryset = FakeQS()
+    queryset = ordering_schema.sort(queryset)
+    assert queryset.is_ordered
+    assert queryset.order_by_args == tuple(order_by_value)