e2e test for transformer (webdriver + pub serve)

test/transformer_e2e_test.dart

Index: test/transformer_e2e_test.dart
diff --git a/test/transformer_e2e_test.dart b/test/transformer_e2e_test.dart
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+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'dart:async';
+import 'dart:io';
+
+@Timeout(const Duration(seconds: 60))
+import 'package:test/test.dart';
+import 'package:webdriver/webdriver.dart' show By, Capabilities, WebDriver;
+
+import 'child_server_process.dart';
+
+main() {
+  group('DDC transformer in pub serve', () {
+    WebDriver webdriver;
+    ChildServerProcess selenium;
+    ChildServerProcess pubServe;
+
+    setUp(() async {
+      // Start pub serve straight away and don't wait for it yet.
+      var pubServeFut =
+          _startPubServe('test/transformer/hello_app', ['--verbose']);
+
+      // Start selenium and wait for it to be ready.
+      stderr.writeln("# [e2e] Awaiting Selenium...");
+      selenium = await _startSelenium();
+      stderr.writeln("# [e2e] Got Selenium!");
+      var seleniumUrl = '${selenium.httpUri}/wd/hub';
+
+      stderr.writeln("# [e2e] Awaiting WebDriver...");
+      var capabilities = {
+        'browserName': 'chrome',
+        "maxInstances": 1,
+        "seleniumProtocol": "WebDriver",
+        'loggingPrefs': {'browser': 'ALL'}
+      };
+      var chromeBin = Platform.environment['CHROME_CANARY_BIN'];
+      if (chromeBin != null) {
+        capabilities['chromeOptions'] = {
+          'binary': chromeBin,
+          'args': ['--no-sandbox'],
+        };
+      }
+      webdriver = await WebDriver.createDriver(
+          url: seleniumUrl, desiredCapabilities: capabilities);
+      stderr.writeln("# [e2e] Got WebDriver!");
+
+      stderr.writeln("# [e2e] Awaiting Pub Serve...");
+      pubServe = await pubServeFut;
+      stderr.writeln("# [e2e] Got Pub Serve!");
+    });
+
+    tearDown(() async {
+      selenium?.process?.kill();
+      pubServe?.process?.kill();
+      await webdriver?.quit();
+    });
+
+    test('serves functional hello world app', () async {
+      await webdriver.get('${pubServe.httpUri}/hello_app/web/');
+
+      var body = await webdriver.findElement(const By.tagName('body'));
+      expect(await body.text, "'Hello, World!'");
+    });
+  });
+}
+
+Future<ChildServerProcess> _startPubServe(String directory,
+    [List<String> args = const []]) async {
+  assert(new Directory(directory).existsSync());
+  var result = await Process.run('pub', ['get'], workingDirectory: directory);
+  if (result.exitCode != 0) {
+    throw new StateError('Pub get failed: ${result.stderr}');
+  }
+  return ChildServerProcess.build(
+      (host, port) => Process.start(
+          'pub', ['serve', '--hostname=$host', '--port=$port']..addAll(args),
+          mode: ProcessStartMode.DETACHED_WITH_STDIO,
+          workingDirectory: directory),
+      defaultPort: 8080);
+}
+
+const _webDriverManagerPath = './node_modules/.bin/webdriver-manager';
+Future<ChildServerProcess> _startSelenium() async {
+  var result = await Process.run(_webDriverManagerPath, ['update']);
+  if (result.exitCode != 0) {
+    throw new StateError('Webdriver update failed: ${result.stderr}');
+  }
+  return ChildServerProcess.build(
+    (host, port) => Process.start(
+        _webDriverManagerPath, ['start', '--seleniumPort=$port'],
+        mode: ProcessStartMode.DETACHED_WITH_STDIO),
+    defaultPort: 4444);
+}