Awsprovider - adding support for SDK sub-classes.

lib/plugins/aws/provider/awsProvider.js

@@ -284,7 +284,8 @@ class AwsProvider {
         if (options && !_.isUndefined(options.region)) {
           credentials.region = options.region;
         }
-        const awsService = new that.sdk[service](credentials);
+        const Service = _.get(that.sdk, service);
+        const awsService = new Service(credentials);
         const req = awsService[method](params);
 
         // TODO: Add listeners, put Debug statements here...

lib/plugins/aws/provider/awsProvider.test.js

@@ -283,6 +283,41 @@ describe('AwsProvider', () => {
       });
     });
 
+    it('should handle subclasses', () => {
+      class DocumentClient {
+        constructor(credentials) {
+          this.credentials = credentials;
+        }
+
+        put() {
+          return {
+            send: cb => cb(null, { called: true }),
+          };
+        }
+      }
+
+      awsProvider.sdk = {
+        DynamoDB: {
+          DocumentClient,
+        },
+      };
+      awsProvider.serverless.service.environment = {
+        vars: {},
+        stages: {
+          dev: {
+            vars: {
+              profile: 'default',
+            },
+            regions: {},
+          },
+        },
+      };
+
+      return awsProvider.request('DynamoDB.DocumentClient', 'put', {}).then(data => {
+        expect(data.called).to.equal(true);
+      });
+    });
+
     it('should call correct aws method with a promise', () => {
       // mocking API Gateway for testing
       class FakeAPIGateway {