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-rw-r--r--test/gleam/string_test.gleam14
1 files changed, 14 insertions, 0 deletions
diff --git a/test/gleam/string_test.gleam b/test/gleam/string_test.gleam
index 3f958d4..3306f0e 100644
--- a/test/gleam/string_test.gleam
+++ b/test/gleam/string_test.gleam
@@ -985,3 +985,17 @@ if erlang {
) -> List(anything) =
"gleam_stdlib_test_ffi" "improper_list_append"
}
+
+pub fn byte_size_test() {
+ let assert 0 = string.byte_size("")
+ let assert 1 = string.byte_size("a")
+ let assert 2 = string.byte_size("ab")
+ let assert 3 = string.byte_size("abc")
+
+ // Unicode graphemes. These will be multiple bytes.
+ let assert 1 = string.byte_size("a")
+ let assert 2 = string.byte_size("รค")
+ let assert 4 = string.byte_size("๐Ÿ‘ฉ")
+ let assert 8 = string.byte_size("๐Ÿ‘ฉ๐Ÿพ")
+ let assert 15 = string.byte_size("๐Ÿ‘ฉ๐Ÿพโ€๐Ÿฆฐ")
+}