Make #/definitions optional as prescribed in the Swagger 2.0 spec

swagger_spec_validator/validator20.py

@@ -37,10 +37,10 @@ def validate_spec(spec_json, _spec_url=None):
     validate_json(spec_json, 'schemas/v2.0/schema.json')
 
     # TODO: Extract 'parameters', 'responses' from the spec as well.
-    apis, definitions = spec_json['paths'], spec_json['definitions']
+    apis = spec_json['paths']
+    definitions = spec_json.get('definitions', {})
 
     validate_apis(apis)
-
     validate_definitions(definitions)
 
 

tests/validator20/validate_spec_test.py

@@ -1,7 +1,35 @@
 import json
+import pytest
 
 from swagger_spec_validator.validator20 import validate_spec
 
 
+@pytest.fixture
+def minimal_swagger_dict():
+    """Return minimal dict that respresents a swagger spec - useful as a base
+    template.
+    """
+    return {
+        'swagger': '2.0',
+        'info': {
+            'title': 'Test',
+            'version': '1.0',
+        },
+        'paths': {
+        },
+        'definitions': {
+        },
+    }
+
+
 def test_success(petstore_contents):
     validate_spec(json.loads(petstore_contents))
+
+
+def test_definitons_not_present_success(minimal_swagger_dict):
+    del minimal_swagger_dict['definitions']
+    validate_spec(minimal_swagger_dict)
+
+
+def test_empty_definitions_succes(minimal_swagger_dict):
+    validate_spec(minimal_swagger_dict)