From cf9bd403766226a3c0df6fe4495bcc53392db56c Mon Sep 17 00:00:00 2001
From: Arun Mahapatra <armahapa@microsoft.com>
Date: Fri, 11 Dec 2015 18:46:23 +0530
Subject: [PATCH] Add support for code coverage with istanbul.

---
 gulpfile.js                          | 22 ++++++++++++++++++----
 package.json                         |  1 +
 tests/TestTaskTests/TestTaskTests.ts |  8 +++-----
 3 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/gulpfile.js b/gulpfile.js
index 331679c..92c2b1b 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -3,10 +3,13 @@ var rimraf = require("rimraf");
 var tsb = require("gulp-tsb");
 var mocha = require("gulp-mocha");
 var tslint = require("gulp-tslint");
+var istanbul = require("gulp-istanbul");
+var path = require("path");
 
 var buildDirectory = "_build";
 var sourceFiles = ["src/**/*.ts", "tests/**/*.ts"];
 var testFiles = [buildDirectory + "/**/*Tests*.js"];
+var jsCoverageDir = path.join(buildDirectory, "codecoverage");
 
 // create and keep compiler
 var compilation = tsb.create({
@@ -19,7 +22,9 @@ var compilation = tsb.create({
 gulp.task("build", ["lint"], function() {
     return gulp.src(sourceFiles, { base: "." })
         .pipe(compilation())
-        .pipe(gulp.dest(buildDirectory));
+        .pipe(gulp.dest(buildDirectory))
+        .pipe(istanbul({includeUntested: true}))
+        .pipe(istanbul.hookRequire());
 });
 
 gulp.task("lint", function() {
@@ -37,12 +42,22 @@ gulp.task("clean", function(done) {
 
 gulp.task("test", ["build"], function() {
     return gulp.src(testFiles, { read: false })
-        .pipe(mocha());
+        .pipe(mocha())
+        .pipe(istanbul.writeReports({
+            dir: jsCoverageDir,
+            reportOpts: { dir: jsCoverageDir }
+        }))
+        .pipe(istanbul.enforceThresholds({ thresholds: { global: 95 } }));
 });
 
 gulp.task("testci", ["build"], function() {
     return gulp.src(testFiles, { read: false })
-        .pipe(mocha({ reporter: 'xunit', reporterOptions: { output: '_build/testTaskMochaTestResult.xml'} }));
+        .pipe(mocha({ reporter: "xunit", reporterOptions: { output: path.join(buildDirectory, "mochaTestResult.xml") } }))
+        .pipe(istanbul.writeReports({
+            dir: jsCoverageDir,
+            reportOpts: { dir: jsCoverageDir }
+        }))
+        .pipe(istanbul.enforceThresholds({ thresholds: { global: 95 } }));
 });
 
 gulp.task("watch", function() {
@@ -50,4 +65,3 @@ gulp.task("watch", function() {
 });
 
 gulp.task("default", ["build"]);
-
diff --git a/package.json b/package.json
index b709b49..8342bd1 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
   "devDependencies": {
     "chai": "^3.4.1",
     "gulp": "^3.9.0",
+    "gulp-istanbul": "^0.10.3",
     "gulp-mocha": "^2.1.3",
     "gulp-tsb": "^1.7.4",
     "gulp-tslint": "^3.5.0",
diff --git a/tests/TestTaskTests/TestTaskTests.ts b/tests/TestTaskTests/TestTaskTests.ts
index 35de6f4..fa11650 100644
--- a/tests/TestTaskTests/TestTaskTests.ts
+++ b/tests/TestTaskTests/TestTaskTests.ts
@@ -6,11 +6,9 @@ import * as testTask from "../../src/Tasks/TestTask/testTask";
 describe("HelloWorldWriter.Write", () : void => {
   it("should throw not implemented error", () : void => {
       assert.doesNotThrow(() : void => {
-      // dummy code
-      var helloWorldWriter = new testTask.HelloWorldWriter();
-      helloWorldWriter.Write();
+        // dummy code
+        var helloWorldWriter = new testTask.HelloWorldWriter();
+        helloWorldWriter.Write();
     });
   });
 });
-
-