Clean up process spawning.

tests/standalone/io/platform_executable_test.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.
 //
 // Process test program to test process communication.
 
 library PlatformExecutableTest;
 
 import "dart:io";
 
@@ skipping 25 matching lines @@
 
   var result = processResult.stdout.trim();
   expectEquals(Platform.executable, result);
 }
 
 void testDartExecShouldNotBeInCurrentDir() {
   var type = FileSystemEntity.typeSync(platformExeName);
   expectEquals(FileSystemEntityType.NOT_FOUND, type);
 }
 
-void testShouldFailOutsidePath() {
-  var threw = false;
-  try {
-    Process.runSync(platformExeName, ['--version'],
-                    includeParentEnvironment: false,
-                    environment: {_SCRIPT_KEY: 'yes', 'PATH': ''});
-  } catch (_) {
-    threw = true;
-  }
-
-  if (!threw) {
-    throw 'Expected running the dart executable – "$platformExeName" without'
-          ' the parent environment or path to fail.';
-  }
+void testShouldSucceedWithEmptyPathEnvironment() {
+  Process.runSync(platformExeName, ['--version'],
+                  includeParentEnvironment: false,
+                  environment: {_SCRIPT_KEY: 'yes', 'PATH': ''});
 }
 
 void testShouldSucceedWithSourcePlatformExecutable() {
   //print('*** Running normally');
   verify(Platform.executable);
 }
 
 void testExeSymLinked(Directory dir) {
   var dirUri = new Uri.directory(dir.path);
   var link = new Link.fromUri(dirUri.resolve('dart_exe_link'));
@@ skipping 72 matching lines @@
     return;
   }
 
   testDartExecShouldNotBeInCurrentDir();
   testShouldSucceedWithSourcePlatformExecutable(); /// 00: ok
   withTempDir(testExeSymLinked); /// 01: ok
   withTempDir(testExeDirSymLinked); /// 02: ok
   testPathToSDKDir(); /// 03: ok
   withTempDir(testPathPointsToSymLinkedSDKPath); /// 04: ok
   withTempDir(testPathToDirWithExeSymLinked); /// 05: ok
-  testShouldFailOutsidePath(); /// 06: ok

[kevmoo, 2015/06/10 10:06:42]

This test existed for a very explicit reason: make sure running just 'dart' (or
'dart.exe') without the PATH set fails.

+  testShouldSucceedWithEmptyPathEnvironment(); /// 06: ok
 }