Enhance remote reference parsing test with mock HTTP response (#2659)

Author: koxudaxi

tests/parser/test_openapi.py

@@ -524,9 +524,42 @@ def test_openapi_parser_parse_array_enum(tmp_path: Path, monkeypatch: pytest.Mon
     assert_output(parser.parse(), expected_file)
 
 
-def test_openapi_parser_parse_remote_ref(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
+def test_openapi_parser_parse_remote_ref(tmp_path: Path, monkeypatch: pytest.MonkeyPatch, mocker: Any) -> None:
     """Test parsing OpenAPI with remote references."""
     monkeypatch.chdir(tmp_path)
+
+    remote_schema = """
+schemas:
+  Problem:
+    properties:
+      detail:
+        description: A human readable explanation specific to this occurrence of the problem.
+        type: string
+      instance:
+        description: An absolute URI that identifies the specific occurrence of the problem.
+        format: uri
+        type: string
+      status:
+        description: The HTTP status code generated by the origin server for this occurrence of the problem.
+        exclusiveMaximum: true
+        format: int32
+        maximum: 600
+        minimum: 100
+        type: integer
+      title:
+        description: A short, summary of the problem type.
+        type: string
+      type:
+        default: about:blank
+        description: An absolute URI that identifies the problem type.
+        format: uri
+        type: string
+    type: object
+"""
+    mock_response = mocker.Mock()
+    mock_response.text = remote_schema
+    mocker.patch("httpx.get", return_value=mock_response)
+
     parser = OpenAPIParser(
         data_model_field_type=DataModelFieldBase,
         source=(DATA_PATH / "refs.yaml").read_text(),