Add failing test case for ref usage

test/data/internal_ref_schema_data.json

@@ -0,0 +1,8 @@
+{
+  "top_level_attribute": false,
+  "objects_of_subtypes": {
+    "name_of_subtype": {
+      "some_attribute": "value"
+    }
+  }
+}

test/files_test.rb

@@ -48,4 +48,9 @@ def test_file_extends
     assert_valid schema_fixture_path('good_schema_extends1.json'), { 'a' => 5 }
     assert_valid schema_fixture_path('good_schema_extends2.json'), { 'a' => 5, 'b' => { 'a' => 5 } }
   end
+
+  def test_internal_ref_schema
+    assert_valid schema_fixture_path('internal_ref_schema.json'), { 'top_level_attribute' => true }
+    assert_valid schema_fixture_path('internal_ref_schema.json'), data_fixture_path('internal_ref_schema_data.json'), uri: true
+  end
 end

test/schemas/internal_ref_schema.json

@@ -0,0 +1,37 @@
+{
+    "$schema": "http://json-schema.org/draft-04/schema#",
+    "$ref": "#/definitions/Toplevel",
+    "definitions": {
+        "Toplevel": {
+            "properties": {
+                "top_level_attribute": {
+                    "type": "boolean",
+                    "description": "A toplevel boolean attribute"
+                },
+                "objects_of_subtypes": {
+                    "additionalProperties": {
+                        "$ref": "#/definitions/some.Subtype",
+                        "additionalProperties": false
+                    },
+                    "type": "object"
+                }
+            },
+            "additionalProperties": false,
+            "type": "object",
+            "title": "Toplevel",
+            "description": "Toplevel type with some attributes and objects of subtypes."
+        },
+        "some.Subtype": {
+            "properties": {
+                "some_attribute": {
+                    "type": "string",
+                    "description": "A string attribute for the sub type"
+                }
+            },
+            "additionalProperties": false,
+            "type": "object",
+            "title": "Subtype",
+            "description": "Subtype can be used inside toplevel."
+        }
+    }
+}