public void Bankkonto_can_withdraw()
{
var konto = new Bankkonto();
konto.Einzahlen(10m);
konto.Abheben(2m);
Assert.AreEqual(8m, konto.Kontostand);
konto.Abheben(5m);
Assert.AreEqual(3m, konto.Kontostand);
}
public void Abheben_with_invalid_amount_throws_ArgumentException(double invalidAmountDouble)
{
Bankkonto konto = new Bankkonto(10m);
decimal invalidAmount = Convert.ToDecimal(invalidAmountDouble);
Assert.ThrowsException <ArgumentException>(() => konto.Abheben(invalidAmount));
}
public void Abheben_with_more_than_Balance_throws_InvalidOperationException(double validAmountDouble)
{
Bankkonto konto = new Bankkonto(10m);
decimal validAmount = Convert.ToDecimal(validAmountDouble);
Assert.ThrowsException <InvalidOperationException>(() => konto.Abheben(validAmount));
}
public void Abheben_mit_ungültigem_Wert_wirft_ArgumentException()
{
Bankkonto konto = new Bankkonto(0);
decimal betrag = -100_000m;
Assert.ThrowsException <ArgumentException>(() => konto.Abheben(betrag));
}
public void Abheben_mit_gültigem_Wert_aber_mehr_als_Kontostand_wift_InvalidOperationException()
{
Bankkonto konto = new Bankkonto(100);
decimal betrag = 200;
Assert.ThrowsException <InvalidOperationException>(() => konto.Abheben(betrag));
}
public void Bankkonto_withdraw_over_balance_throws_ArgumentException()
{
var konto = new Bankkonto();
konto.Einzahlen(5m);
Assert.ThrowsException <ArgumentException>(() => konto.Abheben(10m));
}
public void Bankkonto_withdraw_negative_value_throws_ArgumentException()
{
var konto = new Bankkonto();
konto.Einzahlen(10m);
Assert.ThrowsException <ArgumentException>(() => konto.Abheben(-2m));
}
public void Abheben_with_valid_amount_decreases_Balance(double validAmountDouble)
{
Bankkonto konto = new Bankkonto(1000m);
decimal oldBalance = konto.Kontostand;
decimal validAmount = Convert.ToDecimal(validAmountDouble); // vorsicht: konvertierungsfehler
konto.Abheben(validAmount);
Assert.AreEqual(oldBalance - validAmount, konto.Kontostand);
}
public void Abheben_mit_gültigem_Wert_verringert_Kontostand()
{
Bankkonto konto = new Bankkonto(100);
decimal betrag = 80;
decimal alterKontostand = konto.Kontostand;
konto.Abheben(betrag);
Assert.AreEqual(alterKontostand - betrag, konto.Kontostand);
}