初始提交: Gitea 项目代码

2026-05-30 22:47:36 +08:00
commit f288f76350
6116 changed files with 776822 additions and 0 deletions
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+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package util
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestEllipsisGuessDisplayWidth(t *testing.T) {
+	cases := []struct {
+		r    string
+		want int
+	}{
+		{r: "a", want: 1},
+		{r: "é", want: 1},
+		{r: "测", want: 2},
+		{r: "⚽", want: 2},
+		{r: "☁️", want: 3},     // 2 runes, it has a mark
+		{r: "\u200B", want: 1}, // ZWSP
+		{r: "\u3000", want: 2}, // ideographic space
+	}
+	for _, c := range cases {
+		t.Run(c.r, func(t *testing.T) {
+			w := 0
+			for _, r := range c.r {
+				w += ellipsisDisplayGuessWidth(r)
+			}
+			assert.Equal(t, c.want, w, "hex=% x", []byte(c.r))
+		})
+	}
+}
+
+func TestEllipsisString(t *testing.T) {
+	cases := []struct {
+		limit int
+
+		input, left, right string
+	}{
+		{limit: 0, input: "abcde", left: "", right: "…abcde"},
+		{limit: 1, input: "abcde", left: "", right: "…abcde"},
+		{limit: 2, input: "abcde", left: "", right: "…abcde"},
+		{limit: 3, input: "abcde", left: "…", right: "…abcde"},
+		{limit: 4, input: "abcde", left: "a…", right: "…bcde"},
+		{limit: 5, input: "abcde", left: "abcde", right: ""},
+		{limit: 6, input: "abcde", left: "abcde", right: ""},
+		{limit: 7, input: "abcde", left: "abcde", right: ""},
+
+		// a CJK char or emoji is considered as 2-ASCII width, the ellipsis is 3-ASCII width
+		{limit: 0, input: "测试文本", left: "", right: "…测试文本"},
+		{limit: 1, input: "测试文本", left: "", right: "…测试文本"},
+		{limit: 2, input: "测试文本", left: "", right: "…测试文本"},
+		{limit: 3, input: "测试文本", left: "…", right: "…测试文本"},
+		{limit: 4, input: "测试文本", left: "…", right: "…测试文本"},
+		{limit: 5, input: "测试文本", left: "测…", right: "…试文本"},
+		{limit: 6, input: "测试文本", left: "测…", right: "…试文本"},
+		{limit: 7, input: "测试文本", left: "测试…", right: "…文本"},
+		{limit: 8, input: "测试文本", left: "测试文本", right: ""},
+		{limit: 9, input: "测试文本", left: "测试文本", right: ""},
+
+		{limit: 6, input: "测试abc", left: "测…", right: "…试abc"},
+		{limit: 7, input: "测试abc", left: "测试abc", right: ""}, // exactly 7-width
+		{limit: 8, input: "测试abc", left: "测试abc", right: ""},
+
+		{limit: 7, input: "测abc试啊", left: "测ab…", right: "…c试啊"},
+		{limit: 8, input: "测abc试啊", left: "测abc…", right: "…试啊"},
+		{limit: 9, input: "测abc试啊", left: "测abc试啊", right: ""}, // exactly 9-width
+		{limit: 10, input: "测abc试啊", left: "测abc试啊", right: ""},
+	}
+	for _, c := range cases {
+		t.Run(fmt.Sprintf("%s(%d)", c.input, c.limit), func(t *testing.T) {
+			left, right := EllipsisDisplayStringX(c.input, c.limit)
+			assert.Equal(t, c.left, left, "left")
+			assert.Equal(t, c.right, right, "right")
+		})
+	}
+
+	t.Run("LongInput", func(t *testing.T) {
+		left, right := EllipsisDisplayStringX(strings.Repeat("abc", 240), 90)
+		assert.Equal(t, strings.Repeat("abc", 29)+"…", left)
+		assert.Equal(t, "…"+strings.Repeat("abc", 211), right)
+	})
+
+	t.Run("InvalidUtf8", func(t *testing.T) {
+		invalidCases := []struct {
+			limit       int
+			left, right string
+		}{
+			{limit: 0, left: "", right: "...\xef\x03\xfe\xef\x03\xfe"},
+			{limit: 1, left: "", right: "...\xef\x03\xfe\xef\x03\xfe"},
+			{limit: 2, left: "", right: "...\xef\x03\xfe\xef\x03\xfe"},
+			{limit: 3, left: "...", right: "...\xef\x03\xfe\xef\x03\xfe"},
+			{limit: 4, left: "...", right: "...\xef\x03\xfe\xef\x03\xfe"},
+			{limit: 5, left: "\xef\x03\xfe...", right: "...\xef\x03\xfe"},
+			{limit: 6, left: "\xef\x03\xfe\xef\x03\xfe", right: ""},
+			{limit: 7, left: "\xef\x03\xfe\xef\x03\xfe", right: ""},
+		}
+		for _, c := range invalidCases {
+			t.Run(strconv.Itoa(c.limit), func(t *testing.T) {
+				left, right := EllipsisDisplayStringX("\xef\x03\xfe\xef\x03\xfe", c.limit)
+				assert.Equal(t, c.left, left, "left")
+				assert.Equal(t, c.right, right, "right")
+			})
+		}
+	})
+
+	t.Run("IsLikelyEllipsisLeftPart", func(t *testing.T) {
+		assert.True(t, IsLikelyEllipsisLeftPart("abcde…"))
+		assert.True(t, IsLikelyEllipsisLeftPart("abcde..."))
+	})
+}
+
+func TestTruncateRunes(t *testing.T) {
+	assert.Empty(t, TruncateRunes("", 0))
+	assert.Empty(t, TruncateRunes("", 1))
+
+	assert.Empty(t, TruncateRunes("ab", 0))
+	assert.Equal(t, "a", TruncateRunes("ab", 1))
+	assert.Equal(t, "ab", TruncateRunes("ab", 2))
+	assert.Equal(t, "ab", TruncateRunes("ab", 3))
+
+	assert.Empty(t, TruncateRunes("测试", 0))
+	assert.Equal(t, "测", TruncateRunes("测试", 1))
+	assert.Equal(t, "测试", TruncateRunes("测试", 2))
+	assert.Equal(t, "测试", TruncateRunes("测试", 3))
+}