diff --git a/unittests/ADT/TripleTest.cpp b/unittests/ADT/TripleTest.cpp
index 479046e01d7..3b7558436d9 100644
--- a/unittests/ADT/TripleTest.cpp
+++ b/unittests/ADT/TripleTest.cpp
@@ -390,4 +390,69 @@ TEST(TripleTest, BitWidthArchVariants) {
   EXPECT_EQ(Triple::x86_64, T.get64BitArchVariant().getArch());
 }
 
+TEST(TripleTest, getOSVersion) {
+  Triple T;
+  unsigned Major, Minor, Micro;
+
+  T = Triple("i386-apple-darwin9");
+  T.getMacOSXVersion(Major, Minor, Micro);
+  EXPECT_EQ((unsigned)10, Major);
+  EXPECT_EQ((unsigned)5, Minor);
+  EXPECT_EQ((unsigned)0, Micro);
+  T.getiOSVersion(Major, Minor, Micro);
+  EXPECT_EQ((unsigned)3, Major);
+  EXPECT_EQ((unsigned)0, Minor);
+  EXPECT_EQ((unsigned)0, Micro);
+
+  T = Triple("x86_64-apple-darwin9");
+  T.getMacOSXVersion(Major, Minor, Micro);
+  EXPECT_EQ((unsigned)10, Major);
+  EXPECT_EQ((unsigned)5, Minor);
+  EXPECT_EQ((unsigned)0, Micro);
+  T.getiOSVersion(Major, Minor, Micro);
+  EXPECT_EQ((unsigned)3, Major);
+  EXPECT_EQ((unsigned)0, Minor);
+  EXPECT_EQ((unsigned)0, Micro);
+
+  T = Triple("x86_64-apple-macosx");
+  T.getMacOSXVersion(Major, Minor, Micro);
+  EXPECT_EQ((unsigned)10, Major);
+  EXPECT_EQ((unsigned)4, Minor);
+  EXPECT_EQ((unsigned)0, Micro);
+  T.getiOSVersion(Major, Minor, Micro);
+  EXPECT_EQ((unsigned)3, Major);
+  EXPECT_EQ((unsigned)0, Minor);
+  EXPECT_EQ((unsigned)0, Micro);
+
+  T = Triple("x86_64-apple-macosx10.7");
+  T.getMacOSXVersion(Major, Minor, Micro);
+  EXPECT_EQ((unsigned)10, Major);
+  EXPECT_EQ((unsigned)7, Minor);
+  EXPECT_EQ((unsigned)0, Micro);
+  T.getiOSVersion(Major, Minor, Micro);
+  EXPECT_EQ((unsigned)3, Major);
+  EXPECT_EQ((unsigned)0, Minor);
+  EXPECT_EQ((unsigned)0, Micro);
+
+  T = Triple("armv7-apple-ios");
+  T.getMacOSXVersion(Major, Minor, Micro);
+  EXPECT_EQ((unsigned)10, Major);
+  EXPECT_EQ((unsigned)4, Minor);
+  EXPECT_EQ((unsigned)0, Micro);
+  T.getiOSVersion(Major, Minor, Micro);
+  EXPECT_EQ((unsigned)3, Major);
+  EXPECT_EQ((unsigned)0, Minor);
+  EXPECT_EQ((unsigned)0, Micro);
+
+  T = Triple("armv7-apple-ios5.0");
+  T.getMacOSXVersion(Major, Minor, Micro);
+  EXPECT_EQ((unsigned)10, Major);
+  EXPECT_EQ((unsigned)4, Minor);
+  EXPECT_EQ((unsigned)0, Micro);
+  T.getiOSVersion(Major, Minor, Micro);
+  EXPECT_EQ((unsigned)5, Major);
+  EXPECT_EQ((unsigned)0, Minor);
+  EXPECT_EQ((unsigned)0, Micro);
+}
+
 }