1 files changed, 11 insertions, 0 deletions
diff --git a/test/common/StringTest.cpp b/test/common/StringTest.cpp
index a0895af9..53ed359f 100644
--- a/test/common/StringTest.cpp
+++ b/test/common/StringTest.cpp
@@ -11,6 +11,17 @@ TEST(String, Append) {
   ASSERT_EQ(s, String(u"haha"));
 }
 
+TEST(String, IndexConvert) {
+  using cru::String;
+
+  String s(u"123");
+  ASSERT_EQ(s.IndexFromCodePointToCodeUnit(1), 1);
+  ASSERT_EQ(s.IndexFromCodeUnitToCodePoint(1), 1);
+  ASSERT_EQ(s.IndexFromCodeUnitToCodePoint(3), 3);
+  ASSERT_EQ(s.IndexFromCodeUnitToCodePoint(3), 3);
+
+}
+
 TEST(String, Format) {
   using cru::Format;
   using cru::String;