Fixed Gyp Xcode generator for libraries with identical names.

test/mac/gyptest-identical-name.py

Index: test/mac/gyptest-identical-name.py
diff --git a/test/mac/gyptest-identical-name.py b/test/mac/gyptest-identical-name.py
new file mode 100644
index 0000000000000000000000000000000000000000..0d358df9210f878244c5bf53b6b85af5d69866bf
--- /dev/null
+++ b/test/mac/gyptest-identical-name.py
@@ -0,0 +1,45 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2014 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 libraries (in identical-names) are properly handeled by xcode.
+
+The names for all libraries participating in this build are:
+libtestlib.a - identical-name/testlib
+libtestlib.a - identical-name/proxy/testlib
+libproxy.a   - identical-name/proxy
+The first two libs produce a hash collision in Xcode when Gyp is executed,
+because they have the same name and would be copied to the same directory with
+Xcode default settings.
+For this scenario to work one needs to change the Xcode variables SYMROOT and
+CONFIGURATION_BUILD_DIR. Setting these to per-lib-unique directories, avoids
+copying the libs into the same directory.
+
+The test consists of two steps. The first one verifies that by setting both
+vars, there is no hash collision anymore during Gyp execution and that the libs
+can actually be be built. The second one verifies that there is still a hash
+collision if the vars are not set and thus the current behavior is preserved.
+"""
+
+import TestGyp
+
+import sys
+
+def IgnoreOutput(string, expected_string):
+  return True
+
+if sys.platform == 'darwin':
+  test = TestGyp.TestGyp(formats=['xcode'])
+
+
+  test.run_gyp('test.gyp', chdir='identical-name')
+  test.build('test.gyp', test.ALL, chdir='identical-name')
+
+  test.run_gyp('test-should-fail.gyp', chdir='identical-name')
+  test.built_file_must_not_exist('test-should-fail.xcodeproj')
+
+  test.pass_test()
+