x-platform func for spawning pwd in tests

Fixes test-child-process-buffering

test/common.js

@@ -61,6 +61,16 @@ exports.ddCommand = function(filename, kilobytes) {
 };
 
 
+exports.spawnPwd = function(options) {
+  var spawn = require('child_process').spawn;
+
+  if (process.platform == "win32") {
+    return spawn('cmd.exe', ['/c', 'cd'], options);
+  } else {
+    return spawn('pwd', [], options);
+  }
+};
+
 
 // Turn this off if the test should not check for global leaks.
 exports.globalCheck = true;

test/simple/test-child-process-buffering.js

@@ -28,7 +28,7 @@ var pwd_called = false;
 
 function pwd(callback) {
   var output = '';
-  var child = spawn('pwd');
+  var child = common.spawnPwd();
 
   child.stdout.setEncoding('utf8');
   child.stdout.addListener('data', function(s) {

test/simple/test-child-process-cwd.js

@@ -33,13 +33,10 @@ var returns = 0;
     (after removing traling whitespace)
 */
 function testCwd(options, forCode, forData) {
-  var child, data = '';
+  var data = '';
+
+  var child = common.spawnPwd(options);
 
-  if (process.platform == "win32") {
-    child = spawn('cmd.exe', ['/c', 'cd'], options);
-  } else {
-    child = spawn('pwd', [], options);
-  }
   child.stdout.setEncoding('utf8');
 
   child.stdout.addListener('data', function(chunk) {