// Copyright 2021 The Gitea Authors. All rights reserved.// SPDX-License-Identifier: MIT package util import (	"testing" 	"github.com/stretchr/testify/assert") func TestSplitString(t *testing.T) {	type testCase struct {		input    string		n        int		leftSub  string		ellipsis string	} 	test := func(tc []*testCase, f func(input string, n int) (left, right string)) {		for _, c := range tc {			l, r := f(c.input, c.n)			if c.ellipsis != "" {				assert.Equal(t, c.leftSub+c.ellipsis, l, "test split %q at %d, expected leftSub: %q", c.input, c.n, c.leftSub)				assert.Equal(t, c.ellipsis+c.input[len(c.leftSub):], r, "test split %s at %d, expected rightSub: %q", c.input, c.n, c.input[len(c.leftSub):])			} else {				assert.Equal(t, c.leftSub, l, "test split %q at %d, expected leftSub: %q", c.input, c.n, c.leftSub)				assert.Empty(t, r, "test split %q at %d, expected rightSub: %q", c.input, c.n, "")			}		}	} 	tc := []*testCase{		{"abc123xyz", 0, "", utf8Ellipsis},		{"abc123xyz", 1, "", utf8Ellipsis},		{"abc123xyz", 4, "a", utf8Ellipsis},		{"啊bc123xyz", 4, "", utf8Ellipsis},		{"啊bc123xyz", 6, "啊", utf8Ellipsis},		{"啊bc", 5, "啊bc", ""},		{"啊bc", 6, "啊bc", ""},		{"abc\xef\x03\xfe", 3, "", asciiEllipsis},		{"abc\xef\x03\xfe", 4, "a", asciiEllipsis},		{"\xef\x03", 1, "\xef\x03", ""},	}	test(tc, SplitStringAtByteN)}