1 files changed, 15 insertions, 0 deletions
diff --git a/src/mongo/util/stringutils_test.cpp b/src/mongo/util/stringutils_test.cpp
index a17a66423f9..10f6f7491b5 100644
--- a/src/mongo/util/stringutils_test.cpp
+++ b/src/mongo/util/stringutils_test.cpp
@@ -19,6 +19,7 @@
 
 #include "mongo/bson/util/misc.h"
 #include "mongo/util/stringutils.h"
+#include "mongo/util/hex.h"
 
 namespace mongo {
 
@@ -170,4 +171,18 @@ namespace mongo {
         assertCmp( 0, StringData("0001", 3), StringData("0000", 3), false );
 
     }
+
+    TEST( IntegerToHex, VariousConversions ) {
+        ASSERT_EQUALS(std::string("0"), integerToHex(0));
+        ASSERT_EQUALS(std::string("1"), integerToHex(1));
+        ASSERT_EQUALS(std::string("1337"), integerToHex(0x1337));
+        ASSERT_EQUALS(std::string("FFFFD499"), integerToHex(-11111));
+        ASSERT_EQUALS(std::string("F1FE60C4"), integerToHex(-234987324));
+        ASSERT_EQUALS(std::string("80000000"), integerToHex(std::numeric_limits<int>::min()));
+        ASSERT_EQUALS(std::string("7FFFFFFF"), integerToHex(std::numeric_limits<int>::max()));
+        ASSERT_EQUALS(std::string("7FFFFFFFFFFFFFFF"), 
+                      integerToHex(std::numeric_limits<long long>::max()));
+        ASSERT_EQUALS(std::string("8000000000000000"), 
+                      integerToHex(std::numeric_limits<long long>::min()));
+    }
 }