step6 テストリファクタ

roman_test.go

func TestToRoman(t *testing.T) {
	testCases := []struct {
		in   uint16
		want string
	}{
		{1, "I"},
		{2, "II"},
		{5, "V"},
	}
	for _, test := range testCases {
		name := fmt.Sprintf("%v=>%vと変換できること", test.in, test.want)
		t.Run(name, func(t *testing.T) {
			if got := ToRoman(test.in); got != test.want {
				t.Errorf("ToRoman(%v): got %v want %v", test.in, got, test.want)
			}
		})
	}
}