msvs: Make sure stdout/stderr from rule commands get logged

test/msvs/rules_stdout_stderr/gyptest-rules-stdout-stderr.py

+#!/usr/bin/env python
+
+# Copyright (c) 2015 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 stdout and stderr from rules get logged in the build's
+stdout."""
+
+import sys
+import TestGyp
+
+if sys.platform == 'win32':
+  test = TestGyp.TestGyp(formats=['msvs'])
+
+  test.run_gyp('rules-stdout-stderr.gyp')
+  test.build('rules-stdout-stderr.gyp', test.ALL)
+
+  expected_stdout_lines = [
+    'testing stdout',
+    'This will go to stdout',
+
+    # Note: stderr output from rules will go to the build's stdout.
+    'testing stderr',
+    'This will go to stderr',
+  ]
+  test.must_contain_all_lines(test.stdout(), expected_stdout_lines)
+
+  test.pass_test()