snapshot of https://github.com/mattermost/mattermost.git (master, 2026-09-16; blobs > 131072B omitted)

server/public/model/unicode_test.go

@@ -0,0 +1,36 @@
+package model
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestContainsCJK(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name string
+		s    string
+		want bool
+	}{
+		{name: "empty string", s: "", want: false},
+		{name: "latin only", s: "hello world", want: false},
+		{name: "chinese characters", s: "你好", want: true},
+		{name: "japanese hiragana", s: "こんにちは", want: true},
+		{name: "japanese katakana", s: "カタカナ", want: true},
+		{name: "korean hangul", s: "안녕하세요", want: true},
+		{name: "mixed latin and chinese", s: "hello 你好 world", want: true},
+		{name: "mixed latin and japanese", s: "test こんにちは", want: true},
+		{name: "cyrillic not CJK", s: "слово", want: false},
+		{name: "special characters only", s: "!@#$%^&*()", want: false},
+		{name: "numbers only", s: "12345", want: false},
+		{name: "single CJK char", s: "中", want: true},
+	}
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			got := ContainsCJK(tc.s)
+			require.Equal(t, tc.want, got)
+		})
+	}
+}