public void GetSalePeriodTest()
{
var saleInformation = new SaleInformation();
saleInformation.SaleStarted = false;
saleInformation.SaleFinished = false;
Assert.Equal("不明", saleInformation.GetSalePeriod());
saleInformation.SaleStarted = true;
saleInformation.EndDate = DateTime.Parse("2017/08/31");
Assert.Equal("8/31まで", saleInformation.GetSalePeriod());
saleInformation.StartDate = DateTime.Parse("2017/08/01");
Assert.Equal("8/1～8/31", saleInformation.GetSalePeriod());
saleInformation.SaleFinished = true;
Assert.Equal("終了", saleInformation.GetSalePeriod());
}
