Update test scripts to deal with current VM behavior on optional constructor arguments.

tests/standalone/src/TestRunnerTest.dart

 // Copyright (c) 2011, 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("TestRunnerTest");
 
 #import("../../../tools/testing/dart/test_runner.dart");
 #import("../../../tools/testing/dart/status_file_parser.dart");
-
-// TODO(whesse) source("ProcessTestUtil.dart"); when it is committed.
+#source("ProcessTestUtil.dart");
 
 class TestController {
   static final int numTests = 4;
   static int numCompletedTests = 0;
 
   // Used as TestCase.completedCallback.
   static processCompletedTest(TestCase testCase) {
     TestOutput output = testCase.output;
     print("Test: ${testCase.commandLine}");
     if (output.unexpectedOutput) {
       throw "Unexpected output: ${output.result}";
     }
     print("stdout: ");
     for (var line in output.stdout) print(line);
     print("stderr: ");
     for (var line in output.stderr) print(line);
     
     print("Time: ${output.time}");
     print("Exit code: ${output.exitCode}");
 
     ++numCompletedTests;
     print("$numCompletedTests/$numTests");
     if (numCompletedTests == numTests) {
       print("TestRunnerTest.dart PASSED");
     }
   }
 }
 
+
 TestCase MakeTestCase(String testName, List<String> expectations) {
   String test_path = "tests/standalone/src/${testName}.dart";
   // Working directory may be dart/runtime rather than dart.
   if (!new File(test_path).existsSync()) {
     test_path = "../tests/standalone/src/${testName}.dart";
   }
 
   var timeout = 2;
   return new TestCase(testName,
                       getDartBinName(),
                       <String>["--ignore-unrecognized-flags",
                                "--enable_type_checks",
                                test_path],
                       timeout,
                       TestController.processCompletedTest,
                       new Set<String>.from(expectations));
 }
 
 
 String getDartBinName() {
-  var names = ["out/Debug_ia32/dart",
-               "out/Release_ia32/dart",
-               "xcodebuild/Debug_ia32/dart",
-               "xcodebuild/Release_ia32/dart",
-               "Debug_ia32/dart.exe",
-               "Release_ia32/dart.exe"];
+  var os = new Platform().operatingSystem();
+
+  var outDir = '';
+  if (os == 'linux') {
+    outDir = 'out';
+  } else if (os == 'macos') {
+    outDir = 'xcodebuild';
+  }
+
+  var names = ['$outDir/Debug_ia32/dart',
+               '$outDir/Release_ia32/dart'];
+
   for (var name in names) {
     if (new File(name).existsSync()) {
       return name;
     }
   }
 }
 
 
-String getProcessTestFileName() {
-  var names = ['out/Release_ia32/process_test',
-               'out/Debug_ia32/process_test',
-               'xcodebuild/Release_ia32/process_test',
-               'xcodebuild/Debug_ia32/process_test',
-               'Release_ia32/process_test.exe',
-               'Debug_ia32/process_test.exe'];
-  for (var name in names) {
-    if (new File(name).existsSync()) {
-      return name;
-    }
-  }
-  Expect.fail('Could not find the process_test program.');
-}
-
 void main() {
   int timeout = 2;
   new RunningProcess(MakeTestCase("PassTest", [PASS]), timeout).start();
   new RunningProcess(MakeTestCase("FailTest", [FAIL]), timeout).start();
   new RunningProcess(MakeTestCase("TimeoutTest", [TIMEOUT]), timeout).start();
 
   new RunningProcess(new TestCase("CrashTest",
                                   getProcessTestFileName(),
                                   const ["0", "0", "1", "1"],
                                   timeout,
                                   TestController.processCompletedTest,
                                   new Set<String>.from([CRASH])),
                      timeout).start();
   Expect.equals(4, TestController.numTests);
   // Throw must be from body of start() function for this test to work.
   Expect.throws(
       new RunningProcess(MakeTestCase("PassTest", [SKIP]), timeout).start);
 }