private void CheckPurchaseBtn_Click(object sender, EventArgs e)
{
Notification status;
string userPlate = this.userPlateTxtBox.Text;
string hourToCheck = this.dateTimePicker.Value.ToString();
status = systemParking.AnyPurchaseMatchesPlateAndHour(userPlate, hourToCheck);
this.outputErrorLbl.Text = status.HasErrors() ? $"Error: {status.Message()}" : status.Message();
this.outputErrorLbl.ForeColor = status.HasErrors() ? Color.Red : Color.Green;
}
public void AnyPurchaseMatchesPlatesAndHourTrueTest()
{
system.AddPurchase(purchase);
Assert.IsTrue(system.AnyPurchaseMatchesPlateAndHour("ABC1234", DateTime.Now.AddMinutes(10).ToString("HH:mm")).HasSuccess());
}