step5 2->II

roman_test.go

package roman

import "testing"

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