public void SubscriptionsService_PayPurchase_calls_Update_method()
{
int id = 12;
bool isUpdateCalled = true;
var mock = new Mock <IUnitOfWork>();
mock.Setup(a => a.Purchases.Find(It.IsAny <Func <Purchase, bool> >())).Returns(new List <Purchase>
{
new Purchase {
Id = id, IsPaid = false, UserId = 1
}
});
mock.Setup(a => a.Purchases.Update(It.Is <Purchase>(p =>
(p.Id == id) &&
(p.IsPaid == true) &&
(p.UserId == 1)))).Callback(() => isUpdateCalled = true);
service = new SubscriptionsService(mock.Object);
service.PayPurchase(id);
Assert.IsTrue(isUpdateCalled);
}