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// 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)
}
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