1 files changed, 40 insertions, 0 deletions
diff --git a/third_party/python/gyp/test/gyp-defines/gyptest-regyp.py b/third_party/python/gyp/test/gyp-defines/gyptest-regyp.py
new file mode 100644
index 0000000000..0895d81d4f
--- /dev/null
+++ b/third_party/python/gyp/test/gyp-defines/gyptest-regyp.py
@@ -0,0 +1,40 @@
+#!/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 when the same value is repeated for a gyp define, duplicates are
+stripped from the regeneration rule.
+"""
+
+import os
+import TestGyp
+
+# Regenerating build files when a gyp file changes is currently only supported
+# by the make generator.
+test = TestGyp.TestGyp(formats=['make'])
+
+os.environ['GYP_DEFINES'] = 'key=repeated_value key=value1 key=repeated_value'
+test.run_gyp('defines.gyp')
+test.build('defines.gyp')
+
+# The last occurrence of a repeated set should take precedence over other
+# values. See gyptest-multiple-values.py.
+test.must_contain('action.txt', 'repeated_value')
+
+# So the regeneration rule needs to use the correct order.
+test.must_not_contain(
+    'Makefile', '"-Dkey=repeated_value" "-Dkey=value1" "-Dkey=repeated_value"')
+test.must_contain('Makefile', '"-Dkey=value1" "-Dkey=repeated_value"')
+
+# Sleep so that the changed gyp file will have a newer timestamp than the
+# previously generated build files.
+test.sleep()
+os.utime("defines.gyp", None)
+
+test.build('defines.gyp')
+test.must_contain('action.txt', 'repeated_value')
+
+test.pass_test()