Normalize arguments when using new.

src/index.js

@@ -83,12 +83,13 @@ var Project = require('./project.js');
  */
 function Resource(options) {
   if (!(this instanceof Resource)) {
-    options = common.util.normalizeArguments(this, options, {
-      projectIdRequired: false,
-    });
     return new Resource(options);
   }
 
+  options = common.util.normalizeArguments(this, options, {
+    projectIdRequired: false,
+  });
+
   var config = {
     baseUrl: 'https://cloudresourcemanager.googleapis.com/v1',
     scopes: ['https://www.googleapis.com/auth/cloud-platform'],

test/index.js

@@ -70,6 +70,7 @@ var fakeUtil = extend({}, util, {
     assert.deepEqual(options.exclude, ['operation', 'project']);
   },
 });
+var originalFakeUtil = extend(true, {}, fakeUtil);
 
 describe('Resource', function() {
   var PROJECT_ID = 'test-project-id';
@@ -90,6 +91,7 @@ describe('Resource', function() {
   });
 
   beforeEach(function() {
+    extend(fakeUtil, originalFakeUtil);
     makeAuthenticatedRequestFactoryOverride = null;
 
     resource = new Resource({
@@ -110,23 +112,25 @@ describe('Resource', function() {
       assert(promisified);
     });
 
+    it('should work without new', function() {
+      assert.doesNotThrow(function() {
+        Resource({projectId: PROJECT_ID});
+      });
+    });
+
     it('should normalize the arguments', function() {
-      var normalizeArguments = fakeUtil.normalizeArguments;
       var normalizeArgumentsCalled = false;
-      var fakeOptions = {projectId: PROJECT_ID};
-      var fakeContext = {};
+      var options = {};
 
-      fakeUtil.normalizeArguments = function(context, options) {
+      fakeUtil.normalizeArguments = function(context, options_, config) {
         normalizeArgumentsCalled = true;
-        assert.strictEqual(context, fakeContext);
-        assert.strictEqual(options, fakeOptions);
-        return options;
+        assert.strictEqual(options_, options);
+        assert.strictEqual(config.projectIdRequired, false);
+        return options_;
       };
 
-      Resource.call(fakeContext, fakeOptions);
-      assert(normalizeArgumentsCalled);
-
-      fakeUtil.normalizeArguments = normalizeArguments;
+      new Resource(options);
+      assert.strictEqual(normalizeArgumentsCalled, true);
     });
 
     it('should inherit from Service', function() {