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zeekayandHanzo Dev
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Source files keep their SPDX-License-Identifier and Hanzo copyright line; the Gitea, Gogs and LFS Test Server copyrights they used to repeat now live once in NOTICE, alongside LICENSE. The header lint accepts any copyright line above the SPDX line, so it no longer demands an upstream one. Co-authored-by: Hanzo Dev <[email protected]>
132 lines
4.6 KiB
Go
132 lines
4.6 KiB
Go
// Copyright 2026 Hanzo AI, Inc. All rights reserved.
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// SPDX-License-Identifier: MIT
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package util
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import (
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"fmt"
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"strconv"
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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestEllipsisGuessDisplayWidth(t *testing.T) {
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cases := []struct {
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r string
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want int
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}{
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{r: "a", want: 1},
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{r: "é", want: 1},
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{r: "测", want: 2},
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{r: "⚽", want: 2},
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{r: "☁️", want: 3}, // 2 runes, it has a mark
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{r: "\u200B", want: 1}, // ZWSP
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{r: "\u3000", want: 2}, // ideographic space
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}
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for _, c := range cases {
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t.Run(c.r, func(t *testing.T) {
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w := 0
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for _, r := range c.r {
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w += ellipsisDisplayGuessWidth(r)
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}
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assert.Equal(t, c.want, w, "hex=% x", []byte(c.r))
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})
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}
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}
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func TestEllipsisString(t *testing.T) {
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cases := []struct {
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limit int
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input, left, right string
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}{
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{limit: 0, input: "abcde", left: "", right: "…abcde"},
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{limit: 1, input: "abcde", left: "", right: "…abcde"},
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{limit: 2, input: "abcde", left: "", right: "…abcde"},
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{limit: 3, input: "abcde", left: "…", right: "…abcde"},
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{limit: 4, input: "abcde", left: "a…", right: "…bcde"},
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{limit: 5, input: "abcde", left: "abcde", right: ""},
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{limit: 6, input: "abcde", left: "abcde", right: ""},
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{limit: 7, input: "abcde", left: "abcde", right: ""},
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// a CJK char or emoji is considered as 2-ASCII width, the ellipsis is 3-ASCII width
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{limit: 0, input: "测试文本", left: "", right: "…测试文本"},
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{limit: 1, input: "测试文本", left: "", right: "…测试文本"},
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{limit: 2, input: "测试文本", left: "", right: "…测试文本"},
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{limit: 3, input: "测试文本", left: "…", right: "…测试文本"},
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{limit: 4, input: "测试文本", left: "…", right: "…测试文本"},
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{limit: 5, input: "测试文本", left: "测…", right: "…试文本"},
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{limit: 6, input: "测试文本", left: "测…", right: "…试文本"},
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{limit: 7, input: "测试文本", left: "测试…", right: "…文本"},
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{limit: 8, input: "测试文本", left: "测试文本", right: ""},
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{limit: 9, input: "测试文本", left: "测试文本", right: ""},
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{limit: 6, input: "测试abc", left: "测…", right: "…试abc"},
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{limit: 7, input: "测试abc", left: "测试abc", right: ""}, // exactly 7-width
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{limit: 8, input: "测试abc", left: "测试abc", right: ""},
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{limit: 7, input: "测abc试啊", left: "测ab…", right: "…c试啊"},
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{limit: 8, input: "测abc试啊", left: "测abc…", right: "…试啊"},
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{limit: 9, input: "测abc试啊", left: "测abc试啊", right: ""}, // exactly 9-width
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{limit: 10, input: "测abc试啊", left: "测abc试啊", right: ""},
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}
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for _, c := range cases {
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t.Run(fmt.Sprintf("%s(%d)", c.input, c.limit), func(t *testing.T) {
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left, right := EllipsisDisplayStringX(c.input, c.limit)
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assert.Equal(t, c.left, left, "left")
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assert.Equal(t, c.right, right, "right")
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})
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}
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t.Run("LongInput", func(t *testing.T) {
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left, right := EllipsisDisplayStringX(strings.Repeat("abc", 240), 90)
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assert.Equal(t, strings.Repeat("abc", 29)+"…", left)
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assert.Equal(t, "…"+strings.Repeat("abc", 211), right)
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})
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t.Run("InvalidUtf8", func(t *testing.T) {
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invalidCases := []struct {
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limit int
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left, right string
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}{
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{limit: 0, left: "", right: "...\xef\x03\xfe\xef\x03\xfe"},
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{limit: 1, left: "", right: "...\xef\x03\xfe\xef\x03\xfe"},
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{limit: 2, left: "", right: "...\xef\x03\xfe\xef\x03\xfe"},
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{limit: 3, left: "...", right: "...\xef\x03\xfe\xef\x03\xfe"},
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{limit: 4, left: "...", right: "...\xef\x03\xfe\xef\x03\xfe"},
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{limit: 5, left: "\xef\x03\xfe...", right: "...\xef\x03\xfe"},
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{limit: 6, left: "\xef\x03\xfe\xef\x03\xfe", right: ""},
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{limit: 7, left: "\xef\x03\xfe\xef\x03\xfe", right: ""},
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}
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for _, c := range invalidCases {
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t.Run(strconv.Itoa(c.limit), func(t *testing.T) {
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left, right := EllipsisDisplayStringX("\xef\x03\xfe\xef\x03\xfe", c.limit)
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assert.Equal(t, c.left, left, "left")
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assert.Equal(t, c.right, right, "right")
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})
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}
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})
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t.Run("IsLikelyEllipsisLeftPart", func(t *testing.T) {
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assert.True(t, IsLikelyEllipsisLeftPart("abcde…"))
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assert.True(t, IsLikelyEllipsisLeftPart("abcde..."))
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})
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}
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func TestTruncateRunes(t *testing.T) {
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assert.Empty(t, TruncateRunes("", 0))
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assert.Empty(t, TruncateRunes("", 1))
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assert.Empty(t, TruncateRunes("ab", 0))
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assert.Equal(t, "a", TruncateRunes("ab", 1))
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assert.Equal(t, "ab", TruncateRunes("ab", 2))
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assert.Equal(t, "ab", TruncateRunes("ab", 3))
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assert.Empty(t, TruncateRunes("测试", 0))
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assert.Equal(t, "测", TruncateRunes("测试", 1))
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assert.Equal(t, "测试", TruncateRunes("测试", 2))
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assert.Equal(t, "测试", TruncateRunes("测试", 3))
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}
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