feat: allow setting standard Bucket storage class (#873)

src/storage.ts

@@ -71,6 +71,7 @@ export interface CreateBucketRequest {
   regional?: boolean;
   requesterPays?: boolean;
   retentionPolicy?: object;
+  standard?: boolean;
   userProject?: string;
   location?: string;
 }
@@ -485,6 +486,7 @@ export class Storage extends Service {
    * @property {boolean} [requesterPays=false] **Early Access Testers Only**
    *     Force the use of the User Project metadata field to assign operational
    *     costs when an operation is made on a Bucket and its objects.
+   * @property {boolean} [standard=true] Specify the storage class as Standard.
    * @property {string} [userProject] The ID of the project which will be billed
    *     for the request.
    */
@@ -590,6 +592,7 @@ export class Storage extends Service {
       multiRegional: 'MULTI_REGIONAL',
       nearline: 'NEARLINE',
       regional: 'REGIONAL',
+      standard: 'STANDARD',
     } as {[index: string]: string};
 
     Object.keys(storageClasses).forEach(storageClass => {

test/index.ts

@@ -548,6 +548,15 @@ describe('Storage', () => {
 
         storage.createBucket(BUCKET_NAME, {regional: true}, assert.ifError);
       });
+
+      it('should expand metadata.standard', done => {
+        storage.request = (reqOpts: DecorateRequestOptions) => {
+          assert.strictEqual(reqOpts.json.storageClass, 'STANDARD');
+          done();
+        };
+
+        storage.createBucket(BUCKET_NAME, {standard: true}, assert.ifError);
+      });
     });
 
     describe('requesterPays', () => {