Updated aws provider to invoke .promise on methods that support it. Otherwise falls back to .send with a callback

lib/plugins/aws/provider/awsProvider.js

@@ -271,10 +271,10 @@ class AwsProvider {
       // TODO: Add listeners, put Debug statments here...
       // req.on('send', function (r) {console.log(r)});
 
-      return BbPromise.fromCallback(cb => {
+      const promise = req.promise ? req.promise() : BbPromise.fromCallback(cb => {
         req.send(cb);
-      })
-      .catch(err => {
+      });
+      return promise.catch(err => {
         let message = err.message;
         if (err.message === 'Missing credentials in config') {
           const errorMessage = [

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

@@ -98,7 +98,7 @@ describe('AwsProvider', () => {
         '${opt:stage, \'prod\'}',
       ];
       stages.forEach(stage => {
-        it(`should not throw an error before variable population 
+        it(`should not throw an error before variable population
             even if http event is present and stage is ${stage}`, () => {
           const config = {
             stage,
@@ -286,6 +286,39 @@ describe('AwsProvider', () => {
       });
     });
 
+    it('should call correct aws method with a promise', () => {
+      // mocking API Gateway for testing
+      class FakeAPIGateway {
+        constructor(credentials) {
+          this.credentials = credentials;
+        }
+
+        getRestApis() {
+          return {
+            promise: () => BbPromise.resolve({ called: true }),
+          };
+        }
+      }
+      awsProvider.sdk = {
+        APIGateway: FakeAPIGateway,
+      };
+      awsProvider.serverless.service.environment = {
+        vars: {},
+        stages: {
+          dev: {
+            vars: {
+              profile: 'default',
+            },
+            regions: {},
+          },
+        },
+      };
+
+      return awsProvider.request('APIGateway', 'getRestApis', {}).then(data => {
+        expect(data.called).to.equal(true);
+      });
+    });
+
 
     it('should request to the specified region if region in options set', () => {
       // mocking S3 for testing
@@ -316,7 +349,7 @@ describe('AwsProvider', () => {
           },
         },
       };
-      expect(awsProvider.getCredentials()).to.deep.eql({ region: options.region });
+      expect(awsProvider.getCredentials().region).to.eql(options.region);
 
       return awsProvider
         .request('CloudFormation',
@@ -326,7 +359,7 @@ describe('AwsProvider', () => {
         .then(data => {
           expect(data).to.eql({ region: 'ap-northeast-1' });
           // Requesting different region should not affect region in credentials
-          expect(awsProvider.getCredentials()).to.deep.eql({ region: options.region });
+          expect(awsProvider.getCredentials().region).to.eql(options.region);
         });
     });
     it('should retry if error code is 429', (done) => {