chore(gulp): update gulp scripts

scripts/gulp/tasks/test.ts

@@ -0,0 +1,64 @@
+import { DIST_VENDOR_ROOT, NPM_VENDOR_FILES, PROJECT_ROOT, SCRIPTS_ROOT } from '../constants';
+import path = require('path');
+import { dest, src, task } from 'gulp';
+
+
+task('test', ['test.assembleVendorJs', 'compile.karma'], (done: Function) => {
+  karmaTest(false, done);
+});
+
+task('test.watch', ['test.assembleVendorJs', 'compile.karma'], (done: Function) => {
+  karmaTest(true, done);
+});
+
+task('test.coverage', ['test.assembleVendorJs', 'compile.karma'], (done: Function) => {
+  karmaTest(false, () => {
+    createKarmaCoverageReport(done);
+  });
+});
+
+function karmaTest(watch: boolean, done: Function) {
+  const karma = require('karma');
+  const argv = require('yargs').argv;
+
+  let karmaConfig = {
+    configFile: path.join(SCRIPTS_ROOT, 'karma/karma.conf.js'),
+  };
+
+  if (watch) {
+    (karmaConfig as any).singleRun = false;
+  }
+
+  if (argv.testGrep) {
+    (<any>karmaConfig).client = {
+      args: ['--grep', argv.testGrep]
+    };
+  }
+
+  new karma.Server(karmaConfig, done).start();
+}
+
+
+task('test.assembleVendorJs', () => {
+  const files = NPM_VENDOR_FILES.map((root) => {
+    const glob = path.join(root, '**/*.+(js|js.map)');
+    return src(path.join('node_modules', glob))
+           .pipe(dest(path.join(DIST_VENDOR_ROOT, root)));
+  });
+  const gulpMerge = require('merge2');
+  return gulpMerge(files);
+});
+
+
+/* creates a karma code coverage report */
+function createKarmaCoverageReport(done: Function) {
+  console.log('Generating Unit Test Coverage Report...');
+
+  let exec = require('child_process').exec;
+  let command = `node_modules/.bin/remap-istanbul -i coverage/coverage-final.json -o coverage -t html`;
+
+  exec(command, function(err: any, stdout: any, stderr: any) {
+    console.log(`file://${PROJECT_ROOT}/coverage/index.html`);
+    done(err);
+  });
+}