Add firefox jsshell support in testing scripts.

tools/testing/dart/test_runner.dart

 // Copyright (c) 2012, 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.
 
 /**
  * Classes and methods for executing tests.
  *
  * This module includes:
  * - Managing parallel execution of tests, including timeout checks.
  * - Evaluating the output of each test as pass/fail/crash/timeout.
@@ skipping 14 matching lines @@
 typedef bool EnqueMoreWork(ProcessQueue queue);
 
 /** A command executed as a step in a test case. */
 class Command {
   /** Path to the executable of this command. */
   String executable;
 
   /** Command line arguments to the executable. */
   List<String> arguments;
 
+  /** Environment variables set when running the command */
+  Map<String, String> environment;
+
   /** The actual command line that will be executed. */
   String commandLine;
 
-  Command(this.executable, this.arguments) {
+  Command(this.executable, this.arguments, [this.environment = const {}]) {
     if (Platform.operatingSystem == 'windows') {
       // Windows can't handle the first command if it is a .bat file or the like
       // with the slashes going the other direction.
       // TODO(efortuna): Remove this when fixed (Issue 1306).
       executable = executable.replaceAll('/', '\\');
     }
     commandLine = "$executable ${Strings.join(arguments, ' ')}";
   }
 
   String toString() => commandLine;
@@ skipping 577 matching lines @@
         // This RunningProcess object is done, and hands over control to
         // BatchRunner.startTest(), which handles reporting, etc.
         timeoutTimer.cancel();
         processQueue._getBatchRunner(testCase).startTest(testCase);
       } else {
         runCommand(testCase.commands[currentStep++], stepExitHandler);
       }
     }
   }
 
-  VoidFunction makeReadHandler(StringInputStream source, List<String> destination) {
+  VoidFunction makeReadHandler(StringInputStream source,
+                               List<String> destination) {
     void handler () {
       if (source.closed) return;  // TODO(whesse): Remove when bug is fixed.
       var line = source.readLine();
       while (null != line) {
         destination.add(line);
         line = source.readLine();
       }
     }
     return handler;
   }
 
   void start() {
     Expect.isFalse(testCase.expectedOutcomes.contains(SKIP));
     stdout = new List<String>();
     stderr = new List<String>();
     currentStep = 0;
     startTime = new Date.now();
     runCommand(testCase.commands[currentStep++], stepExitHandler);
   }
 
   void runCommand(Command command,
                   void exitHandler(int exitCode)) {
-    process = Process.start(command.executable, command.arguments);
+    ProcessOptions options = new ProcessOptions();
+    options.environment = command.environment;
+    process = Process.start(command.executable,
+                            command.arguments,
+                            options);
     process.onExit = exitHandler;
     process.onError = (e) {
       print("Error starting process:");
       print("  Command: $command");
       print("  Error: $e");
       testComplete(-1, false);
     };
     InputStream stdoutStream = process.stdout;
     InputStream stderrStream = process.stderr;
     StringInputStream stdoutStringStream = new StringInputStream(stdoutStream);
@@ skipping 566 matching lines @@
         // the developer doesn't waste his or her time trying to fix a bunch of
         // tests that appear to be broken but were actually just flakes that
         // didn't get retried because there had already been one failure.
         bool allowRetry = _MAX_FAILED_NO_RETRY > _progress.numFailedTests;
         new RunningProcess(test, allowRetry, this).start();
       }
       _numProcesses++;
     }
   }
 }