add testcase for 601

Author: willson-chen

jsonschema/schemas/complex_schemas/basic_shapes/complex_layer2-1.json

@@ -0,0 +1,10 @@
+{
+    "type": "object",
+    "properties": {
+      "top_left": { "$ref": "point.json" },
+      "top_right": { "$ref": "point.json" },
+      "bottom_left": { "$ref": "point.json" },
+      "bottom_right": { "$ref": "point.json" }
+    },
+    "required": ["top_left", "top_right", "bottom_left", "bottom_right"]
+}

jsonschema/schemas/complex_schemas/basic_shapes/complex_layer2-2.json

@@ -0,0 +1,8 @@
+{
+    "type": "object",
+    "properties": {
+        "center": { "$ref": "point.json" },
+        "radius": {"type": "number"}
+    },
+    "required": ["center", "radius"]
+}

jsonschema/schemas/complex_schemas/complex_shapes/complex_layer1.json

@@ -0,0 +1,12 @@
+{
+    "type": "object",
+
+    "allOf": [
+       { "$ref": "basic_shapes/complex_layer2-1.json" }
+    ],
+
+    "properties": {
+      "hole": { "$ref": "basic_shapes/complex_layer2-2.json" }
+    },
+    "required": ["hole"]
+}

jsonschema/schemas/complex_schemas/point.json

@@ -0,0 +1,8 @@
+{
+  "type": "object",
+  "properties": {
+    "x": { "type": "number" },
+    "y": { "type": "number" }
+  },
+  "required": ["x", "y"]
+}

jsonschema/tests/test_validators.py

@@ -1135,6 +1135,26 @@ def test_ref(self):
             ),
         )
 
+    def test_complex_ref(self):
+        filename = "../../../../jsonschema/schemas/complex_schemas/"
+        with open(filename + "complex_shapes/complex_layer1.json") as file:
+            schema = json.load(file)
+        if os.name == 'nt':
+            file_prefix = "file:///{}/"
+        else:
+            file_prefix = "file://{}/"
+        base_uri = file_prefix.format(os.path.abspath(filename))
+        resolver = validators.RefResolver(base_uri=base_uri, referrer=schema)
+
+        data = {
+            "top_left": {"x": 10, "y": 10},
+            "top_right": {"x": 20, "y": 10},
+            "bottom_left": {"x": 10, "y": 20},
+            "bottom_right": {"x": 20, "y": 20},
+            "hole": {"center": {"x": 20, "y": 20}, "radius": 7},
+        }
+        self.assertIsNone(validators.validate(data, schema, resolver=resolver))
+
 
 class MetaSchemaTestsMixin(object):
     # TODO: These all belong upstream