add path schema test case.

tests/data/openapi/schemas_via_path_references/cat/paths.yaml

@@ -0,0 +1,19 @@
+cat:
+  get:
+    summary: Get a cat
+    responses:
+      200:
+        content:
+          application/json:
+            schema:
+              $ref: './schemas.yaml#/CatDetails'
+cats:
+  get:
+    summary: Get all cats
+    responses:
+      200:
+        content:
+          application/json:
+            schema:
+              $ref: './schemas.yaml#/CatList'
+

tests/data/openapi/schemas_via_path_references/cat/schemas.yaml

@@ -0,0 +1,41 @@
+CatInfo:
+  type: object
+  required:
+    - cat_id
+  properties:
+    cat_id:
+      type: string
+      description: ID of this cat
+    details:
+      $ref: "#/CatDetails"
+
+CatDetails:
+  type: object
+  required:
+    - name
+    - birthYear
+  properties:
+    name:
+      type: string
+      description: Name of this cat
+    birthYear:
+      type: number
+      description: Year of this cat's birth
+
+
+CatList:
+  type: array
+  items:
+    $ref: "#/CatShort"
+
+CatShort:
+  type: object
+  required:
+    - cat_id
+  properties:
+    cat_id:
+      type: string
+      description: ID of this cat
+    name:
+      type: string
+      description: Name of this cat

tests/data/openapi/schemas_via_path_references/openapi.yaml

@@ -0,0 +1,9 @@
+openapi: 3.1.0
+info:
+  title: "Entity Schemas"
+  version: '1'
+paths: 
+  /cat:
+    $ref: "./cat/paths.yaml#/cat"
+  /cats:
+    $ref: "./cat/paths.yaml#/cats"

tests/main/openapi/test_main_openapi.py

@@ -2388,6 +2388,28 @@ def test_main_openapi_reference_same_hierarchy_directory():
             )
 
 
+@freeze_time("2019-07-26")
+def test_main_openapi_schemas_via_path_references():
+    with TemporaryDirectory() as output_dir:
+        with chdir(OPEN_API_DATA_PATH / "schemas_via_path_references"):
+            output_file: Path = Path(output_dir) / "output.py"
+            return_code: Exit = main(
+                [
+                    "--input",
+                    "./openapi.yaml",
+                    "--output",
+                    str(output_file),
+                    "--input-file-type",
+                    "openapi",
+                    "--openapi-scopes",
+                    "paths",
+                ]
+            )
+            assert return_code == Exit.OK
+            output_data = output_file.read_text()
+            print("data is:", output_data)
+
+
 @freeze_time('2019-07-26')
 def test_main_multiple_required_any_of():
     with TemporaryDirectory() as output_dir: