1 files changed, 7 insertions, 0 deletions
diff --git a/test/test_strutil.cc b/test/test_strutil.cc
index 4b65218..038851d 100644
--- a/test/test_strutil.cc
+++ b/test/test_strutil.cc
@@ -217,3 +217,10 @@ TEST(strutil, join_view) {
   EXPECT_EQ(",foo,", str::join(std::vector<std::string_view>({",", ","}),
                                "foo"));
 }
+
+TEST(strutil, to_lower_ascii) {
+  EXPECT_EQ("", str::to_lower_ascii(""));
+  EXPECT_EQ("foo", str::to_lower_ascii("foo"));
+  EXPECT_EQ("foo", str::to_lower_ascii("FOO"));
+  EXPECT_EQ("smÖrgÅs", str::to_lower_ascii("SMÖRGÅS"));
+}