Add web mock extensions

lib/api_smith/web_mock_extensions.rb

@@ -0,0 +1,23 @@
+module APISmith
+  module WebMockExtensions
+
+    def subject_api_class
+      subject.is_a?(Class) ? subject : subject.class
+    end
+
+    def subject_class_instance
+      @subject_class_instance ||= subject_api_class.allocate
+    end
+
+    def api_url_for(path)
+      path     = subject_class_instance.send(:path_for, path)
+      base_uri = subject_api_class.base_uri
+      File.join base_uri, path
+    end
+
+    def stub_api(type, path)
+      stub_request(type, api_url_for(path))
+    end
+
+  end
+end