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Improve "ellipsis string" (#32989)

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This commit is contained in:
wxiaoguang
2024-12-26 14:19:35 +08:00
committed by GitHub
parent 9bfa9f450d
commit 550abdbc24
2 changed files with 60 additions and 8 deletions
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33
modules/util/truncate_test.go
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@ -11,6 +11,30 @@ import (
"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 += ellipsisGuessDisplayWidth(r)
}
assert.Equal(t, c.want, w, "hex=% x", []byte(c.r))
})
}
}
func TestEllipsisString(t *testing.T) {
cases := []struct {
limit int
@ -37,6 +61,15 @@ func TestEllipsisString(t *testing.T) {
{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) {