public void ShouldFakeAddingNewEntityToContext()
{
var dinner = new Dinner {
DinnerID = 1
};
IList <Dinner> dinners = new List <Dinner>();
// ARRANGE
NerdDinners nerdDinners = new NerdDinners();
// Arranging: When nerdDinners.Dinners.Add() is called with a Dinner argument, that equals dinner, it should add that argument
// to the dinners collection instead.
Mock.Arrange(() => nerdDinners.Dinners.Add(dinner)).DoInstead((Dinner d) => dinners.Add(d));
// Then we arrange that SaveChanges() should do nothing for the nerdDinners instance.
Mock.Arrange(() => nerdDinners.SaveChanges()).DoNothing();
// ACT
nerdDinners.Dinners.Add(dinner);
nerdDinners.SaveChanges();
// ASSERT
Assert.AreEqual(1, dinners.Count);
Assert.AreEqual(1, dinners[0].DinnerID);
}
public string GetAndFormatDinnerInfo(int dinnerID)
{
StringBuilder info = new StringBuilder();
using (var dbContext = new NerdDinners())
{
Dinner checkedDinner = (from d in dbContext.Dinners
where d.DinnerID == dinnerID
select d).FirstOrDefault();
info.AppendFormat("Title: {0} \n", checkedDinner.Title);
info.AppendFormat("DinnerID: {0} \n", checkedDinner.DinnerID);
info.AppendFormat("EventDate: {0} \n", checkedDinner.EventDate.Date);
info.AppendFormat("Address: {0} \n", checkedDinner.Address);
info.AppendFormat("HostedBy: {0}", checkedDinner.HostedBy);
}
return(info.ToString());
}
public void ShouldReturnFakeCollectionWhenExpected()
{
// ARRANGE
NerdDinners nerdDinners = new NerdDinners();
// Arranging: When nerdDinners.Dinners_GET is called, it should return fake collection (fakeDinners).
Mock.Arrange(() => nerdDinners.Dinners).ReturnsCollection(FakeDinners());
// ACT - We call the nerdDinners.Dinners and search for a dinner with a certain DinnerID.
var actualQuery = from d in nerdDinners.Dinners
where d.DinnerID == 1
select d;
// ASSERT
// We assert that the nerdDinners.Dinners collection will actually return a collection with 2 items.
Assert.AreEqual(3, nerdDinners.Dinners.Count());
// We assert that there is only one item in our collection and this item has DinnerID equal to one.
Assert.AreEqual(1, actualQuery.Count());
Assert.AreEqual(1, actualQuery.First().DinnerID);
}
public void ShouldReturnFakeCollectionForFutureInstance()
{
// ARRANGE
NerdDinners nerdDinners = new NerdDinners();
// Arranging: When nerdDinners.Dinners_GET is called, it should return fake collection (fakeDinners) no matter the instance.
Mock.Arrange(() => nerdDinners.Dinners).IgnoreInstance().ReturnsCollection(FakeDinners());
// ACT
// We will create another instance of the NerdDinners class and will act on it.
NerdDinners actualNerdDinners = new NerdDinners();
var actualQuery = from d in actualNerdDinners.Dinners
where d.DinnerID == 1
select d;
// ASSERT
// We assert that the actualNerdDinners.Dinners collection will actually return a collection with 2 items.
Assert.AreEqual(3, actualNerdDinners.Dinners.Count());
// We assert that there is only one item in our collection and this item has DinnerID equal to one.
Assert.AreEqual(1, actualQuery.Count());
Assert.AreEqual(1, actualQuery.First().DinnerID);
}
