refactor(examples/e2e_test): Ts'ifying examples/e2_test

Translate AtScript in examples/e2e_test to TypeScript.

Closes #2294

modules/examples/e2e_test/sourcemap/sourcemap_spec.ts

@@ -0,0 +1,49 @@
+import * as testUtil from 'angular2/src/test_lib/e2e_util';
+
+var fs = require('fs');
+var sourceMap = require('source-map');
+
+describe('sourcemaps', function() {
+  var URL = 'examples/src/sourcemap/index.html';
+
+  it('should map sources', function() {
+    browser.get(URL);
+
+    $('error-app .errorButton').click();
+
+    // TODO(tbosch): Bug in ChromeDriver: Need to execute at least one command
+    // so that the browser logs can be read out!
+    browser.executeScript('1+1');
+    browser.manage().logs().get('browser').then(function(logs) {
+      var errorLine = null;
+      var errorColumn = null;
+      logs.forEach(function(log) {
+        var match = /\.createError\s+\(.+:(\d+):(\d+)/m.exec(log.message);
+        if (match) {
+          errorLine = parseInt(match[1]);
+          errorColumn = parseInt(match[2]);
+        }
+      });
+
+      expect(errorLine).not.toBeNull();
+      expect(errorColumn).not.toBeNull();
+
+
+      var sourceMapData = fs.readFileSync('dist/js/prod/es5/examples/src/sourcemap/index.js.map');
+      var decoder = new sourceMap.SourceMapConsumer(JSON.parse(sourceMapData));
+
+      var originalPosition = decoder.originalPositionFor({line: errorLine, column: errorColumn});
+
+      var finalMapData = fs.readFileSync('dist/js/prod/es6/examples/src/sourcemap/index.es6.map');
+      var finalDecoder = new sourceMap.SourceMapConsumer(JSON.parse(finalMapData));
+
+      var finalPosition = finalDecoder.originalPositionFor(originalPosition);
+
+      var sourceCodeLines =
+          fs.readFileSync('modules/examples/src/sourcemap/index.ts', {encoding: 'UTF-8'})
+              .split('\n');
+      expect(sourceCodeLines[finalPosition.line - 1])
+          .toMatch(/throw new BaseException\(\'Sourcemap test\'\)/);
+    });
+  });
+});