enabled coverage reports for browsers Solves #8632

.gitignore

@@ -8,3 +8,5 @@ node_modules/
 examples/node/svgdump/
 examples/node/pdf2png/*.png
 package-lock.json
+.idea
+

.travis.yml

@@ -9,3 +9,6 @@ install:
   - npm install -g gulp-cli
   - npm install
   - npm update
+
+after_success:
+  - npm run coveralls

gulpfile.js

@@ -37,6 +37,8 @@ var zip = require('gulp-zip');
 var webpack2 = require('webpack');
 var webpackStream = require('webpack-stream');
 var vinyl = require('vinyl-fs');
+var istanbul = require('gulp-istanbul');
+var inject = require('gulp-inject');
 
 var BUILD_DIR = 'build/';
 var L10N_DIR = 'l10n/';
@@ -84,6 +86,11 @@ var DEFINES = {
   SKIP_BABEL: false,
 };
 
+var ISTANBUL_PATHS = {
+  'javascript': ['coverage/**/*.js'],
+  tests: ['test/**/*.js'],
+};
+
 function safeSpawnSync(command, parameters, options) {
   // Execute all commands in a shell.
   options = options || {};
@@ -1168,6 +1175,29 @@ gulp.task('lint', function (done) {
   });
 });
 
+gulp.task('instrument', function () {
+  return gulp.src(['src/**/*.js'])
+  // Covering files
+    .pipe(istanbul({ coverageVariable: '__coverage__',
+    }))
+    // instrumented files will go here
+    .pipe(gulp.dest('coverage/'));
+});
+
+gulp.task('inject', ['instrument'], function (cb) {
+  return gulp.src('index.html')
+    .pipe(inject(
+      gulp.src(ISTANBUL_PATHS.javascript, { read: false, }), {
+        relative: true,
+      }))
+    .pipe(inject(
+      gulp.src(ISTANBUL_PATHS.tests, { read: false, }), {
+        relative: true,
+        starttag: '<!-- inject:tests:js -->',
+      }))
+    .pipe(gulp.dest('.'));
+});
+
 gulp.task('server', function (done) {
   console.log();
   console.log('### Starting local server');

package.json

@@ -8,6 +8,7 @@
     "babel-plugin-transform-es2015-modules-commonjs": "^6.26.0",
     "babel-preset-env": "^1.6.0",
     "core-js": "^2.5.1",
+    "coveralls": "^3.0.0",
     "escodegen": "^1.9.0",
     "eslint": "^4.10.0",
     "eslint-plugin-mozilla": "^0.4.9",
@@ -18,6 +19,7 @@
     "gulp-transform": "^3.0.5",
     "gulp-util": "^3.0.8",
     "gulp-zip": "^4.0.0",
+    "istanbul": "^1.0.0-alpha.2",
     "jasmine": "^2.8.0",
     "jasmine-core": "^2.8.0",
     "jsdoc": "^3.5.5",
@@ -38,11 +40,17 @@
     "yargs": "^9.0.1"
   },
   "scripts": {
-    "test": "gulp lint unittestcli externaltest"
+    "test": "gulp lint unittestcli externaltest",
+    "cover": "istanbul cover --include-all-sources jasmine JASMINE_CONFIG_PATH=test/unit/clitests.json",
+    "coveralls": "npm run cover && cat ./coverage/lcov.info | coveralls"
   },
   "repository": {
     "type": "git",
     "url": "git://github.com/mozilla/pdf.js.git"
   },
-  "license": "Apache-2.0"
+  "license": "Apache-2.0",
+  "dependencies": {
+    "gulp-inject": "^4.3.0",
+    "gulp-istanbul": "^1.1.2"
+  }
 }