Passes original dom event object to beforeNavigate payload

src/app/App.js

@@ -627,7 +627,7 @@ class App extends EventEmitter {
 
 		var navigateFailed = false;
 		try {
-			this.navigate(utils.getUrlPath(href));
+			this.navigate(utils.getUrlPath(href), false, event);
 		} catch (err) {
 			// Do not prevent link navigation in case some synchronous error occurs
 			navigateFailed = true;
@@ -665,9 +665,10 @@ class App extends EventEmitter {
 	 * Navigates to the specified path if there is a route handler that matches.
 	 * @param {!string} path Path to navigate containing the base path.
 	 * @param {boolean=} opt_replaceHistory Replaces browser history.
+	 * @param {Event=} event Optional event object that triggered the navigation.
 	 * @return {CancellablePromise} Returns a pending request cancellable promise.
 	 */
-	navigate(path, opt_replaceHistory) {
+	navigate(path, opt_replaceHistory, opt_event) {
 		if (!utils.isHtml5HistorySupported()) {
 			throw new Error('HTML5 History is not supported. Senna will not intercept navigation.');
 		}
@@ -679,6 +680,7 @@ class App extends EventEmitter {
 		}
 
 		this.emit('beforeNavigate', {
+			event: opt_event,
 			path: path,
 			replaceHistory: !!opt_replaceHistory
 		});

test/app/App.js

@@ -743,6 +743,32 @@ describe('App', function() {
 		exitDocumentLinkElement();
 	});
 
+	it('should pass original event object to "beforeNavigate" when a link is clicked', () => {
+		this.app = new App();
+		this.app.addRoutes(new Route('/path', Screen));
+		this.app.on('beforeNavigate', (data) => {
+      assert.ok(data.event);
+      assert.equal('click', data.event.type);
+		});
+    dom.triggerEvent(enterDocumentLinkElement('/path'), 'click');
+		exitDocumentLinkElement();
+
+    assert.notEqual('/path', window.location.pathname);
+	});
+
+	it('should prevent navigation on both senna and the browser via beforeNavigate', () => {
+		this.app = new App();
+		this.app.addRoutes(new Route('/preventedPath', Screen));
+		this.app.on('beforeNavigate', (data, event) => {
+      data.event.preventDefault();
+      event.preventDefault();
+		});
+    dom.triggerEvent(enterDocumentLinkElement('/preventedPath'), 'click');
+		exitDocumentLinkElement();
+
+    assert.notEqual('/preventedPath', window.location.pathname);
+	});
+
 	it('should not navigate when clicking on external links', () => {
 		var link = enterDocumentLinkElement('http://sennajs.com');
 		this.app = new App();