truncate_test.go

package text

import (
	"testing"
)

func TestTruncate(t *testing.T) {
	type args struct {
		max int
		s   string
	}
	tests := []struct {
		name string
		args args
		want string
	}{
		{
			name: "Japanese",
			args: args{
				max: 11,
				s:   "テストテストテストテスト",
			},
			want: "テストテ...",
		},
		{
			name: "Japanese filled",
			args: args{
				max: 11,
				s:   "aテストテストテストテスト",
			},
			want: "aテスト... ",
		},
		{
			name: "Chinese",
			args: args{
				max: 11,
				s:   "幫新舉報違章工廠新增編號",
			},
			want: "幫新舉報...",
		},
		{
			name: "Chinese filled",
			args: args{
				max: 11,
				s:   "a幫新舉報違章工廠新增編號",
			},
			want: "a幫新舉... ",
		},
		{
			name: "Korean",
			args: args{
				max: 11,
				s:   "프로젝트 내의",
			},
			want: "프로젝트...",
		},
		{
			name: "Korean filled",
			args: args{
				max: 11,
				s:   "a프로젝트 내의",
			},
			want: "a프로젝... ",
		},
		{
			name: "Emoji",
			args: args{
				max: 11,
				s:   "💡💡💡💡💡💡💡💡💡💡💡💡",
			},
			want: "💡💡💡💡...",
		},
		{
			name: "Accented characters",
			args: args{
				max: 11,
				s:   "é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́é́́",
			},
			want: "é́́é́́é́́é́́é́́é́́é́́é́́...",
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := Truncate(tt.args.max, tt.args.s); got != tt.want {
				t.Errorf("Truncate() = %q, want %q", got, tt.want)
			}
		})
	}
}

func TestDisplayWidth(t *testing.T) {
	tests := []struct {
		name string
		text string
		want int
	}{
		{
			name: "check mark",
			text: `✓`,
			want: 1,
		},
		{
			name: "bullet icon",
			text: `•`,
			want: 1,
		},
		{
			name: "middle dot",
			text: `·`,
			want: 1,
		},
		{
			name: "ellipsis",
			text: `…`,
			want: 1,
		},
		{
			name: "right arrow",
			text: `→`,
			want: 1,
		},
		{
			name: "smart double quotes",
			text: `“”`,
			want: 2,
		},
		{
			name: "smart single quotes",
			text: `‘’`,
			want: 2,
		},
		{
			name: "em dash",
			text: `—`,
			want: 1,
		},
		{
			name: "en dash",
			text: `–`,
			want: 1,
		},
		{
			name: "emoji",
			text: `👍`,
			want: 2,
		},
		{
			name: "accent character",
			text: `é́́`,
			want: 1,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := DisplayWidth(tt.text); got != tt.want {
				t.Errorf("DisplayWidth() = %v, want %v", got, tt.want)
			}
		})
	}
}