Rename Page.Events.ConsoleMessageAdded -> Page.Events.ConsoleMessage

This patch:
- renames ConsoleMessageAdded into ConsoleMessage for the sake of
  clarity
- adds a test to cover basic functionality

examples/features.js

@@ -21,7 +21,7 @@ var browser = new Browser();
 browser.newPage().then(async page => {
     var modernizrPath = path.join('..', 'third_party', 'phantomjs', 'examples', 'modernizr.js');
     await page.injectFile(modernizrPath);
-    page.on('Page.Events.ConsoleMessageAdded', console.log);
+    page.on('Page.Events.ConsoleMessage', console.log);
     await page.evaluate(detectFeatures);
     browser.close();
 });

lib/Page.js

@@ -204,7 +204,7 @@ class Page extends EventEmitter {
 
     _onConsoleAPI(event) {
         var values = event.args.map(arg => arg.value || arg.description || '');
-        this.emit(Page.Events.ConsoleMessageAdded, values.join(' '));
+        this.emit(Page.Events.ConsoleMessage, values.join(' '));
     }
 
     /**
@@ -416,7 +416,7 @@ Page.ScreenshotTypes = {
 };
 
 Page.Events = {
-    ConsoleMessageAdded: 'Page.Events.ConsoleMessageAdded',
+    ConsoleMessage: 'Page.Events.ConsoleMessage',
     DialogOpened: 'Page.Events.DialogOpened',
     ExceptionThrown: 'Page.Events.ExceptionThrown',
     ResourceLoadingFailed: 'Page.Events.ResourceLoadingFailed',

phantomjs/WebPage.js

@@ -63,7 +63,7 @@ class WebPage {
         this._pageEvents = new AsyncEmitter(this._page);
         this._pageEvents.on(PageEvents.ResponseReceived, response => this._onResponseReceived(response));
         this._pageEvents.on(PageEvents.ResourceLoadingFailed, event => (this.onResourceError || noop).call(null, event));
-        this._pageEvents.on(PageEvents.ConsoleMessageAdded, msg => (this.onConsoleMessage || noop).call(null, msg));
+        this._pageEvents.on(PageEvents.ConsoleMessage, msg => (this.onConsoleMessage || noop).call(null, msg));
         this._pageEvents.on(PageEvents.DialogOpened, dialog => this._onDialog(dialog));
         this._pageEvents.on(PageEvents.ExceptionThrown, (exception, stack) => (this._onError || noop).call(null, exception, stack));
     }

test/test.js

@@ -33,6 +33,13 @@ describe('Puppeteer', function() {
         expect(result).toBe(56);
     }));
 
+    it('Page.Events.ConsoleMessage', SX(async function() {
+        var msgs = [];
+        page.on('Page.Events.ConsoleMessage', msg => msgs.push(msg));
+        await page.evaluate(() => console.log('Message!'));
+        expect(msgs).toEqual(['Message!']);
+    }));
+
     describe('Page.setInPageCallback', function() {
         it('should work', SX(async function() {
             await page.setInPageCallback('callController', function(a, b) {