package tabledef

import "testing"

func TestTruncateHeader(t *testing.T) {
	tests := []struct {
		name  string
		val   string
		width int
		want  string
	}{
		{name: "fits unchanged", val: "TAX PAID ABROAD", width: 15, want: "TAX PAID ABROAD"},
		{name: "cut mid-word keeps the most runes", val: "EXPENSES AND CHARGES", width: 15, want: "EXPENSES AND C…"},
		{name: "single overlong word is hard cut", val: "ESTRANGEIRO", width: 8, want: "ESTRANG…"},
		{name: "cut ignores word boundaries", val: "IMPOSTO PAGO NO ESTRANGEIRO", width: 15, want: "IMPOSTO PAGO N…"},
		{name: "multibyte runes count as one", val: "PAÍS DA CONTRAPARTE", width: 12, want: "PAÍS DA CON…"},
		{name: "narrow width", val: "ABCD", width: 2, want: "A…"},
	}
	for _, tt := range tests {
		if got := truncateHeader(tt.val, tt.width); got != tt.want {
			t.Errorf("%s: truncateHeader(%q, %d) = %q, want %q", tt.name, tt.val, tt.width, got, tt.want)
		}
	}
}