MSVS: Fix to ensure that actions are re-run when the action command changes

test/actions-args-change/gyptest-all.py

Index: test/actions-args-change/gyptest-all.py
diff --git a/test/actions-args-change/gyptest-all.py b/test/actions-args-change/gyptest-all.py
new file mode 100755
index 0000000000000000000000000000000000000000..0a9a3e33cde554feb0b6ef3fdcb450f1cac4477b
--- /dev/null
+++ b/test/actions-args-change/gyptest-all.py
@@ -0,0 +1,48 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2012 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Verifies that actions get re-run when their arguments change.
+
+This is a regression test for http://code.google.com/p/gyp/issues/detail?id=262
+"""
+
+import os
+
+import TestGyp
+
+
+def ReadFile(filename):
+  fh = open(filename, "r")
+  try:
+    return fh.read()
+  finally:
+    fh.close()
+
+
+def WriteFile(filename, data):
+  fh = open(filename, "w")
+  try:
+    fh.write(data)
+  finally:
+    fh.close()
+
+
+test = TestGyp.TestGyp()
+
+test.run_gyp('arg-action.gyp', chdir='src')
+test.build('arg-action.gyp', chdir='src')
+test.built_file_must_match('dest-file.txt', 'ARG_VALUE_1', chdir='src')
+
+gypi_file = os.path.join(test.workdir, 'src', 'arg-action.gypi')
+data = ReadFile(gypi_file)
+WriteFile(gypi_file, data.replace('ARG_VALUE_1', 'ARG_VALUE_2'))
+
+test.run_gyp('arg-action.gyp', chdir='src')
+test.build('arg-action.gyp', chdir='src')
+test.built_file_must_match('dest-file.txt', 'ARG_VALUE_2', chdir='src')
+
+test.pass_test()