From 9ec076e4f62bf41b6c4a5491e6428a27d70a3c23 Mon Sep 17 00:00:00 2001
From: Samuel Berthe <dev@samuel-berthe.fr>
Date: Mon, 20 Mar 2023 17:59:52 +0100
Subject: [PATCH] test: adding some tests to Substring (see #288)

---
 string_example_test.go | 6 ++++++
 string_test.go         | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/string_example_test.go b/string_example_test.go
index ad93fda0..b659ea14 100644
--- a/string_example_test.go
+++ b/string_example_test.go
@@ -9,14 +9,20 @@ func ExampleSubstring() {
 	result1 := Substring("hello", 2, 3)
 	result2 := Substring("hello", -4, 3)
 	result3 := Substring("hello", -2, math.MaxUint)
+	result4 := Substring("🏠🐶🐱", 0, 2)
+	result5 := Substring("你好，世界", 0, 3)
 
 	fmt.Printf("%v\n", result1)
 	fmt.Printf("%v\n", result2)
 	fmt.Printf("%v\n", result3)
+	fmt.Printf("%v\n", result4)
+	fmt.Printf("%v\n", result5)
 	// Output:
 	// llo
 	// ell
 	// lo
+	// 🏠🐶
+	// 你好，
 }
 
 func ExampleChunkString() {
diff --git a/string_test.go b/string_test.go
index e32e5c52..42832586 100644
--- a/string_test.go
+++ b/string_test.go
@@ -75,6 +75,7 @@ func TestSubstring(t *testing.T) {
 	str11 := Substring("hello", -4, 1)
 	str12 := Substring("hello", -4, math.MaxUint)
 	str13 := Substring("🏠🐶🐱", 0, 2)
+	str14 := Substring("你好，世界", 0, 3)
 
 	is.Equal("", str1)
 	is.Equal("", str2)
@@ -89,6 +90,7 @@ func TestSubstring(t *testing.T) {
 	is.Equal("e", str11)
 	is.Equal("ello", str12)
 	is.Equal("🏠🐶", str13)
+	is.Equal("你好，", str14)
 }
 
 func TestRuneLength(t *testing.T) {