public async Task CanRedeemCoupon_NullEvaluator_ArgumentNullException()
{
var couponManager = new CouponManager(_logger, _couponProvider);
var ex = await Assert.ThrowsAsync <ArgumentNullException>(() =>
couponManager.CanRedeemCoupon(new Guid(), new Guid(), null));
Assert.Equal(new ArgumentNullException("Evaluators can not be null").Message, ex.Message);
}
public async Task CanRedeemCoupon_EmptyEvaluator_ReturnTrue()
{
_mock.Mock <ICouponProvider>().Setup(m => m.Retrieve(new Guid())).ReturnsAsync(new Coupon());
var couponManager = new CouponManager(_logger, _couponProvider);
var result =
await couponManager.CanRedeemCoupon(new Guid(), new Guid(), _emptyEvaluators);
Assert.True(result);
}
public async Task CanRedeemCoupon_NullCoupon_ArgumentNullException()
{
_mock.Mock <ICouponProvider>().Setup(m => m.Retrieve(new Guid())).ReturnsAsync(null as Coupon);
var couponManager = new CouponManager(_logger, _couponProvider);
var ex = await Assert.ThrowsAsync <KeyNotFoundException>(() =>
couponManager.CanRedeemCoupon(new Guid(), new Guid(), new List <Func <Coupon, Guid, bool> >()));
Assert.NotStrictEqual(new KeyNotFoundException(), ex);
}
public async Task EvaluatorsAreNull()
{
//Arrange
var couponManager = new CouponManager(_fakeLogger, _fakeCouponProvider);
//Act and Assert
var ex = await Assert.ThrowsExceptionAsync <ArgumentNullException>(() => couponManager.CanRedeemCoupon(Guid.NewGuid(), Guid.NewGuid(), null));
Assert.AreEqual(ex.ParamName, "evaluators");
}
public async Task NoCouponFound()
{
//Arrange
A.CallTo(() => _fakeCouponProvider.Retrieve(Guid.NewGuid())).WithAnyArguments().Returns <Coupon>(null);
var func = A.Fake <IEnumerable <Func <Coupon, Guid, bool> > >();
var couponManager = new CouponManager(_fakeLogger, _fakeCouponProvider);
//Act and Assert
await Assert.ThrowsExceptionAsync <KeyNotFoundException>(() => couponManager.CanRedeemCoupon(Guid.NewGuid(), Guid.NewGuid(), func));
}
public async Task WithCouponButNoEvaluator()
{
//Arrange
var func = A.Fake <IEnumerable <Func <Coupon, Guid, bool> > >();
//Assuming a coupon is found
A.CallTo(() => _fakeCouponProvider.Retrieve(Guid.NewGuid())).WithAnyArguments().Returns <Coupon>(new Coupon());
//Act
var couponManager = new CouponManager(_fakeLogger, _fakeCouponProvider);
var result = await couponManager.CanRedeemCoupon(Guid.NewGuid(), Guid.NewGuid(), func);
//Assert
Assert.IsTrue(result);
}
public async Task WithCouponButFailingEvaluation()
{
//Arrange
var fakeFuncs = A.CollectionOfFake <Func <Coupon, Guid, bool> >(10);
//Assuming a coupon is found
A.CallTo(() => _fakeCouponProvider.Retrieve(Guid.NewGuid())).WithAnyArguments().Returns <Coupon>(new Coupon());
foreach (var fakeFunc in fakeFuncs)
{
//Assuming all the evaluators resulted to false
A.CallTo(() => fakeFunc.Invoke(new Coupon(), Guid.NewGuid())).Returns(false);
}
//Act
var couponManager = new CouponManager(_fakeLogger, _fakeCouponProvider);
var result = await couponManager.CanRedeemCoupon(Guid.NewGuid(), Guid.NewGuid(), fakeFuncs.AsEnumerable());
//Assert
Assert.IsFalse(result);
}