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Improve "ellipsis string" (#32989)
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@ -11,6 +11,30 @@ import (
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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 += ellipsisGuessDisplayWidth(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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@ -37,6 +61,15 @@ func TestEllipsisString(t *testing.T) {
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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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