public void TestPayBillNoSuchBill()
{
var billManagerMock = new Mock <IBillManager>();
billManagerMock.Setup(m =>
m.GetBill(It.IsAny <int>()))
.Returns <Bill>(null);
var billAPI = new BillAPI(billManagerMock.Object, null);
var result = billAPI.PayBill(1, 100);
Assert.AreEqual(BillErrorCodes.NoSuchBill, result);
billManagerMock.Verify(m =>
m.PayBill(It.IsAny <Bill>(), It.IsAny <int>()), Times.Never);
}
public void TestPayBillExactAmount()
{
var billManagerMock = new Mock <IBillManager>();
billManagerMock.Setup(m =>
m.GetBill(It.IsAny <int>()))
.Returns(new Bill {
BillID = 1, Amount = 100
});
var billAPI = new BillAPI(billManagerMock.Object, null);
var result = billAPI.PayBill(1, 100);
Assert.AreEqual(BillErrorCodes.okTheWholeBillIsPayed, result);
billManagerMock.Verify(m =>
m.PayBill(It.IsAny <Bill>(), It.IsAny <double>()), Times.Once);
}
public void TestPayBillTooLargeAmount()
{
var billManagerMock = new Mock <IBillManager>();
billManagerMock.Setup(m =>
m.GetBill(It.IsAny <int>()))
.Returns(new Bill {
BillID = 1, Amount = 100
});
var billAPI = new BillAPI(billManagerMock.Object, null);
var result = billAPI.PayBill(1, 101);
Assert.AreEqual(BillErrorCodes.ToLargeAmount, result);
billManagerMock.Verify(m =>
m.PayBill(It.IsAny <Bill>(), It.IsAny <int>()), Times.Never);
}