Fix build break due to missing error.

Add a new  task testci which uses the xunit reporter.
Add a watch task to monitor and run tests in dev box.

gulpfile.js

@@ -36,7 +36,16 @@ gulp.task("clean", function(done) {
 
 gulp.task("test", ["build"], function() {
     return gulp.src(testFiles, { read: false })
-        .pipe(mocha( { reporter: 'xunit', reporterOptions: { output: '_build/testTaskMochTestResult.xml'}  }  ));
+        .pipe(mocha());
+});
+
+gulp.task("testci", ["build"], function() {
+    return gulp.src(testFiles, { read: false })
+        .pipe(mocha({ reporter: 'xunit', reporterOptions: { output: '_build/testTaskMochaTestResult.xml'} }));
+});
+
+gulp.task("watch", function() {
+    gulp.watch(sourceFiles, ["test"]);    
 });
 
 gulp.task("default", ["build"]);

src/Tasks/TestTask/testTask.ts

@@ -1,7 +1,8 @@
+/// <reference path="../../../typings/tsd.d.ts" />
+
 // Writes hello world!
 export class HelloWorldWriter {
   public Write(): void {
-    throw new Error("Not implemented");
+    // throw new TypeError("Not implemented");
   }
-}
-
+}

tests/TestTaskTests/TestTaskTests.ts

@@ -1,9 +1,11 @@
+/// <reference path="../../typings/tsd.d.ts"/>
+
 import * as assert from "assert";
 import * as testTask from "../../src/Tasks/TestTask/testTask";
 
 describe("HelloWorldWriter.Write", () : void => {
   it("should throw not implemented error", () : void => {
-      assert.throws(() : void => {
+      assert.doesNotThrow(() : void => {
       // dummy code
       var helloWorldWriter = new testTask.HelloWorldWriter();
       helloWorldWriter.Write();