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runtime/observatory/tests/service/test_helper.dart

 // Copyright (c) 2013, 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.
 
 library test_helper;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 import 'package:observatory/service_io.dart';
 import 'service_test_common.dart';
 
 /// Will be set to the http address of the VM's service protocol before
 /// any tests are invoked.
 String serviceHttpAddress;
 String serviceWebsocketAddress;
 
 const String _TESTEE_ENV_KEY = 'SERVICE_TEST_TESTEE';
-const Map<String, String> _TESTEE_SPAWN_ENV = const {
-  _TESTEE_ENV_KEY: 'true'
-};
+const Map<String, String> _TESTEE_SPAWN_ENV = const {_TESTEE_ENV_KEY: 'true'};
 bool _isTestee() {
   return Platform.environment.containsKey(_TESTEE_ENV_KEY);
 }
 
 const String _SKY_SHELL_ENV_KEY = 'SERVICE_TEST_SKY_SHELL';
 bool _shouldLaunchSkyShell() {
   return Platform.environment.containsKey(_SKY_SHELL_ENV_KEY);
 }
+
 String _skyShellPath() {
   return Platform.environment[_SKY_SHELL_ENV_KEY];
 }
 
 class _ServiceTesteeRunner {
-  Future run({testeeBefore(): null,
-              testeeConcurrent(): null,
-              bool pause_on_start: false,
-              bool pause_on_exit: false}) async {
+  Future run(
+      {testeeBefore(): null,
+      testeeConcurrent(): null,
+      bool pause_on_start: false,
+      bool pause_on_exit: false}) async {
     if (!pause_on_start) {
       if (testeeBefore != null) {
         var result = testeeBefore();
         if (result is Future) {
           await result;
         }
       }
       print(''); // Print blank line to signal that testeeBefore has run.
     }
     if (testeeConcurrent != null) {
       var result = testeeConcurrent();
       if (result is Future) {
         await result;
       }
     }
     if (!pause_on_exit) {
       // Wait around for the process to be killed.
       stdin.first.then((_) => exit(0));
     }
   }
 
-  void runSync({void testeeBeforeSync(): null,
-                void testeeConcurrentSync(): null,
-                bool pause_on_start: false,
-                bool pause_on_exit: false}) {
+  void runSync(
+      {void testeeBeforeSync(): null,
+      void testeeConcurrentSync(): null,
+      bool pause_on_start: false,
+      bool pause_on_exit: false}) {
     if (!pause_on_start) {
       if (testeeBeforeSync != null) {
         testeeBeforeSync();
       }
       print(''); // Print blank line to signal that testeeBefore has run.
     }
     if (testeeConcurrentSync != null) {
       testeeConcurrentSync();
     }
     if (!pause_on_exit) {
       // Wait around for the process to be killed.
       stdin.first.then((_) => exit(0));
     }
   }
 }
 
 class _ServiceTesteeLauncher {
   Process process;
   final List<String> args;
   bool killedByTester = false;
 
-  _ServiceTesteeLauncher() :
-      args = [Platform.script.toFilePath()] {}
+  _ServiceTesteeLauncher() : args = [Platform.script.toFilePath()] {}
 
   // Spawn the testee process.
-  Future<Process> _spawnProcess(bool pause_on_start,
-                                bool pause_on_exit,
-                                bool pause_on_unhandled_exceptions,
-                                bool testeeControlsServer,
-                                bool useAuthToken,
-                                List<String> extraArgs) {
+  Future<Process> _spawnProcess(
+      bool pause_on_start,
+      bool pause_on_exit,
+      bool pause_on_unhandled_exceptions,
+      bool testeeControlsServer,
+      bool useAuthToken,
+      List<String> extraArgs) {
     assert(pause_on_start != null);
     assert(pause_on_exit != null);
     assert(pause_on_unhandled_exceptions != null);
     assert(testeeControlsServer != null);
     assert(useAuthToken != null);
 
     if (_shouldLaunchSkyShell()) {
-      return _spawnSkyProcess(pause_on_start,
-                              pause_on_exit,
-                              pause_on_unhandled_exceptions,
-                              testeeControlsServer,
-                              extraArgs);
+      return _spawnSkyProcess(pause_on_start, pause_on_exit,
+          pause_on_unhandled_exceptions, testeeControlsServer, extraArgs);
     } else {
-      return _spawnDartProcess(pause_on_start,
-                               pause_on_exit,
-                               pause_on_unhandled_exceptions,
-                               testeeControlsServer,
-                               useAuthToken,
-                               extraArgs);
+      return _spawnDartProcess(
+          pause_on_start,
+          pause_on_exit,
+          pause_on_unhandled_exceptions,
+          testeeControlsServer,
+          useAuthToken,
+          extraArgs);
     }
   }
 
-  Future<Process> _spawnDartProcess(bool pause_on_start,
-                                    bool pause_on_exit,
-                                    bool pause_on_unhandled_exceptions,
-                                    bool testeeControlsServer,
-                                    bool useAuthToken,
-                                    List<String> extraArgs) {
+  Future<Process> _spawnDartProcess(
+      bool pause_on_start,
+      bool pause_on_exit,
+      bool pause_on_unhandled_exceptions,
+      bool testeeControlsServer,
+      bool useAuthToken,
+      List<String> extraArgs) {
     assert(!_shouldLaunchSkyShell());
 
     String dartExecutable = Platform.executable;
 
     var fullArgs = [];
     if (pause_on_start) {
       fullArgs.add('--pause-isolates-on-start');
     }
     if (pause_on_exit) {
       fullArgs.add('--pause-isolates-on-exit');
     }
     if (pause_on_unhandled_exceptions) {
       fullArgs.add('--pause-isolates-on-unhandled-exceptions');
     }
     if (extraArgs != null) {
       fullArgs.addAll(extraArgs);
     }
 
     fullArgs.addAll(Platform.executableArguments);
     if (!testeeControlsServer) {
       fullArgs.add('--enable-vm-service:0');
     }
     fullArgs.addAll(args);
 
-    return _spawnCommon(
-        dartExecutable,
-        fullArgs,
-        <String, String>{
-          'DART_SERVICE_USE_AUTH': '$useAuthToken'
-        });
+    return _spawnCommon(dartExecutable, fullArgs,
+        <String, String>{'DART_SERVICE_USE_AUTH': '$useAuthToken'});
   }
 
-  Future<Process> _spawnSkyProcess(bool pause_on_start,
-                                   bool pause_on_exit,
-                                   bool pause_on_unhandled_exceptions,
-                                   bool testeeControlsServer,
-                                   List<String> extraArgs) {
+  Future<Process> _spawnSkyProcess(
+      bool pause_on_start,
+      bool pause_on_exit,
+      bool pause_on_unhandled_exceptions,
+      bool testeeControlsServer,
+      List<String> extraArgs) {
     assert(_shouldLaunchSkyShell());
 
     String dartExecutable = _skyShellPath();
 
     var dartFlags = [];
     var fullArgs = [];
     if (pause_on_start) {
       dartFlags.add('--pause_isolates_on_start');
       fullArgs.add('--start-paused');
     }
@@ skipping 12 matching lines @@
     fullArgs.addAll(Platform.executableArguments);
     if (!testeeControlsServer) {
       fullArgs.add('--observatory-port=0');
     }
     fullArgs.add('--dart-flags=${dartFlags.join(' ')}');
     fullArgs.addAll(args);
 
     return _spawnCommon(dartExecutable, fullArgs, <String, String>{});
   }
 
-  Future<Process> _spawnCommon(String executable,
-                               List<String> arguments,
-                               Map<String, String> dartEnvironment) {
+  Future<Process> _spawnCommon(String executable, List<String> arguments,
+      Map<String, String> dartEnvironment) {
     var environment = _TESTEE_SPAWN_ENV;
     var bashEnvironment = new StringBuffer();
     environment.forEach((k, v) => bashEnvironment.write("$k=$v "));
     if (dartEnvironment != null) {
       dartEnvironment.forEach((k, v) {
         arguments.insert(0, '-D$k=$v');
       });
     }
     print('** Launching $bashEnvironment$executable ${arguments.join(' ')}');
     return Process.start(executable, arguments, environment: environment);
   }
 
-  Future<Uri> launch(bool pause_on_start,
-                     bool pause_on_exit,
-                     bool pause_on_unhandled_exceptions,
-                     bool testeeControlsServer,
-                     bool useAuthToken,
-                     List<String> extraArgs) {
-    return _spawnProcess(pause_on_start,
-                  pause_on_exit,
-                  pause_on_unhandled_exceptions,
-                  testeeControlsServer,
-                  useAuthToken,
-                  extraArgs).then((p) {
+  Future<Uri> launch(
+      bool pause_on_start,
+      bool pause_on_exit,
+      bool pause_on_unhandled_exceptions,
+      bool testeeControlsServer,
+      bool useAuthToken,
+      List<String> extraArgs) {
+    return _spawnProcess(
+        pause_on_start,
+        pause_on_exit,
+        pause_on_unhandled_exceptions,
+        testeeControlsServer,
+        useAuthToken,
+        extraArgs).then((p) {
       Completer<Uri> completer = new Completer<Uri>();
       process = p;
       Uri uri;
       var blank;
       var first = true;
-      process.stdout.transform(UTF8.decoder)
-                    .transform(new LineSplitter()).listen((line) {
+      process.stdout
+          .transform(UTF8.decoder)
+          .transform(new LineSplitter())
+          .listen((line) {
         const kObservatoryListening = 'Observatory listening on ';
         if (line.startsWith(kObservatoryListening)) {
           uri = Uri.parse(line.substring(kObservatoryListening.length));
         }
         if (pause_on_start || line == '') {
           // Received blank line.
           blank = true;
         }
         if ((uri != null) && (blank == true) && (first == true)) {
           completer.complete(uri);
           // Stop repeat completions.
           first = false;
           print('** Signaled to run test queries on $uri');
         }
         print('>testee>out> $line');
       });
-      process.stderr.transform(UTF8.decoder)
-                    .transform(new LineSplitter()).listen((line) {
+      process.stderr
+          .transform(UTF8.decoder)
+          .transform(new LineSplitter())
+          .listen((line) {
         print('>testee>err> $line');
       });
       process.exitCode.then((exitCode) {
         if ((exitCode != 0) && !killedByTester) {
           throw "Testee exited with $exitCode";
         }
         print("** Process exited");
       });
       return completer.future;
     });
   }
 
   void requestExit() {
     print('** Killing script');
     if (process.kill()) {
       killedByTester = true;
     }
   }
 }
 
 void setupAddresses(Uri serverAddress) {
   serviceWebsocketAddress =
       'ws://${serverAddress.authority}${serverAddress.path}ws';
-  serviceHttpAddress =
-      'http://${serverAddress.authority}${serverAddress.path}';
+  serviceHttpAddress = 'http://${serverAddress.authority}${serverAddress.path}';
 }
 
 class _ServiceTesterRunner {
-  void run({List<String> mainArgs,
-            List<String> extraArgs,
-            List<VMTest> vmTests,
-            List<IsolateTest> isolateTests,
-            bool pause_on_start: false,
-            bool pause_on_exit: false,
-            bool verbose_vm: false,
-            bool pause_on_unhandled_exceptions: false,
-            bool testeeControlsServer: false,
-            bool useAuthToken: false}) {
+  void run(
+      {List<String> mainArgs,
+      List<String> extraArgs,
+      List<VMTest> vmTests,
+      List<IsolateTest> isolateTests,
+      bool pause_on_start: false,
+      bool pause_on_exit: false,
+      bool verbose_vm: false,
+      bool pause_on_unhandled_exceptions: false,
+      bool testeeControlsServer: false,
+      bool useAuthToken: false}) {
     var process = new _ServiceTesteeLauncher();
     bool testsDone = false;
     runZoned(() {
-      process.launch(pause_on_start, pause_on_exit,
-                   pause_on_unhandled_exceptions,
-                   testeeControlsServer,
-                   useAuthToken, extraArgs).then((Uri serverAddress) async {
+      process
+          .launch(pause_on_start, pause_on_exit, pause_on_unhandled_exceptions,
+              testeeControlsServer, useAuthToken, extraArgs)
+          .then((Uri serverAddress) async {
         if (mainArgs.contains("--gdb")) {
           var pid = process.process.pid;
           var wait = new Duration(seconds: 10);
           print("Testee has pid $pid, waiting $wait before continuing");
           sleep(wait);
         }
         setupAddresses(serverAddress);
         var name = Platform.script.pathSegments.last;
         var vm =
             new WebSocketVM(new WebSocketVMTarget(serviceWebsocketAddress));
@@ skipping 26 matching lines @@
           }
         }
 
         print('All service tests completed successfully.');
         testsDone = true;
         await process.requestExit();
       });
     }, onError: (error, stackTrace) async {
       if (testsDone) {
         print('Ignoring late exception during process exit:\n'
-              '$error\n#stackTrace');
+            '$error\n#stackTrace');
       } else {
         await process.requestExit();
         print('Unexpected exception in service tests: $error\n$stackTrace');
         throw error;
       }
     });
   }
 
   Future<Isolate> getFirstIsolate(WebSocketVM vm) async {
     if (vm.isolates.isNotEmpty) {
@@ skipping 35 matching lines @@
       });
     }
     return await completer.future;
   }
 }
 
 /// Runs [tests] in sequence, each of which should take an [Isolate] and
 /// return a [Future]. Code for setting up state can run before and/or
 /// concurrently with the tests. Uses [mainArgs] to determine whether
 /// to run tests or testee in this invokation of the script.
-Future runIsolateTests(List<String> mainArgs,
-                       List<IsolateTest> tests,
-                       {testeeBefore(),
-                        testeeConcurrent(),
-                        bool pause_on_start: false,
-                        bool pause_on_exit: false,
-                        bool verbose_vm: false,
-                        bool pause_on_unhandled_exceptions: false,
-                        bool testeeControlsServer: false,
-                        bool useAuthToken: false,
-                        List<String> extraArgs}) async {
+Future runIsolateTests(List<String> mainArgs, List<IsolateTest> tests,
+    {testeeBefore(),
+    testeeConcurrent(),
+    bool pause_on_start: false,
+    bool pause_on_exit: false,
+    bool verbose_vm: false,
+    bool pause_on_unhandled_exceptions: false,
+    bool testeeControlsServer: false,
+    bool useAuthToken: false,
+    List<String> extraArgs}) async {
   assert(!pause_on_start || testeeBefore == null);
   if (_isTestee()) {
-    new _ServiceTesteeRunner().run(testeeBefore: testeeBefore,
-                                   testeeConcurrent: testeeConcurrent,
-                                   pause_on_start: pause_on_start,
-                                   pause_on_exit: pause_on_exit);
+    new _ServiceTesteeRunner().run(
+        testeeBefore: testeeBefore,
+        testeeConcurrent: testeeConcurrent,
+        pause_on_start: pause_on_start,
+        pause_on_exit: pause_on_exit);
   } else {
     new _ServiceTesterRunner().run(
         mainArgs: mainArgs,
         extraArgs: extraArgs,
         isolateTests: tests,
         pause_on_start: pause_on_start,
         pause_on_exit: pause_on_exit,
         verbose_vm: verbose_vm,
         pause_on_unhandled_exceptions: pause_on_unhandled_exceptions,
         testeeControlsServer: testeeControlsServer,
         useAuthToken: useAuthToken);
   }
 }
 
 /// Runs [tests] in sequence, each of which should take an [Isolate] and
 /// return a [Future]. Code for setting up state can run before and/or
 /// concurrently with the tests. Uses [mainArgs] to determine whether
 /// to run tests or testee in this invokation of the script.
 ///
 /// This is a special version of this test harness specifically for the
 /// pause_on_unhandled_exceptions_test, which cannot properly function
 /// in an async context (because exceptions are *always* handled in async
 /// functions).
-void runIsolateTestsSynchronous(List<String> mainArgs,
-                                List<IsolateTest> tests,
-                                {void testeeBefore(),
-                                 void testeeConcurrent(),
-                                 bool pause_on_start: false,
-                                 bool pause_on_exit: false,
-                                 bool verbose_vm: false,
-                                 bool pause_on_unhandled_exceptions: false,
-                                 List<String> extraArgs}) {
+void runIsolateTestsSynchronous(List<String> mainArgs, List<IsolateTest> tests,
+    {void testeeBefore(),
+    void testeeConcurrent(),
+    bool pause_on_start: false,
+    bool pause_on_exit: false,
+    bool verbose_vm: false,
+    bool pause_on_unhandled_exceptions: false,
+    List<String> extraArgs}) {
   assert(!pause_on_start || testeeBefore == null);
   if (_isTestee()) {
-    new _ServiceTesteeRunner().runSync(testeeBeforeSync: testeeBefore,
-                                       testeeConcurrentSync: testeeConcurrent,
-                                       pause_on_start: pause_on_start,
-                                       pause_on_exit: pause_on_exit);
+    new _ServiceTesteeRunner().runSync(
+        testeeBeforeSync: testeeBefore,
+        testeeConcurrentSync: testeeConcurrent,
+        pause_on_start: pause_on_start,
+        pause_on_exit: pause_on_exit);
   } else {
     new _ServiceTesterRunner().run(
         mainArgs: mainArgs,
         extraArgs: extraArgs,
         isolateTests: tests,
         pause_on_start: pause_on_start,
         pause_on_exit: pause_on_exit,
         verbose_vm: verbose_vm,
         pause_on_unhandled_exceptions: pause_on_unhandled_exceptions);
   }
 }
 
-
 /// Runs [tests] in sequence, each of which should take an [Isolate] and
 /// return a [Future]. Code for setting up state can run before and/or
 /// concurrently with the tests. Uses [mainArgs] to determine whether
 /// to run tests or testee in this invokation of the script.
-Future runVMTests(List<String> mainArgs,
-                  List<VMTest> tests,
-                  {testeeBefore(),
-                   testeeConcurrent(),
-                   bool pause_on_start: false,
-                   bool pause_on_exit: false,
-                   bool verbose_vm: false,
-                   bool pause_on_unhandled_exceptions: false,
-                   List<String> extraArgs}) async {
+Future runVMTests(List<String> mainArgs, List<VMTest> tests,
+    {testeeBefore(),
+    testeeConcurrent(),
+    bool pause_on_start: false,
+    bool pause_on_exit: false,
+    bool verbose_vm: false,
+    bool pause_on_unhandled_exceptions: false,
+    List<String> extraArgs}) async {
   if (_isTestee()) {
-    new _ServiceTesteeRunner().run(testeeBefore: testeeBefore,
-                                   testeeConcurrent: testeeConcurrent,
-                                   pause_on_start: pause_on_start,
-                                   pause_on_exit: pause_on_exit);
+    new _ServiceTesteeRunner().run(
+        testeeBefore: testeeBefore,
+        testeeConcurrent: testeeConcurrent,
+        pause_on_start: pause_on_start,
+        pause_on_exit: pause_on_exit);
   } else {
     new _ServiceTesterRunner().run(
         mainArgs: mainArgs,
         extraArgs: extraArgs,
         vmTests: tests,
         pause_on_start: pause_on_start,
         pause_on_exit: pause_on_exit,
         verbose_vm: verbose_vm,
         pause_on_unhandled_exceptions: pause_on_unhandled_exceptions);
   }
 }