public void UpdateAllChildItemValuesTest()
{
// Arrange: set up a context mock with an initial collection of child items (obtained from mocked root items), exposed through a provider mock.
Mock <IMyContext> myContextMock = new Mock <IMyContext>();
var myChildItems = new DbSetMock <MyChildItem>(MyMockedRootItems.SelectMany(r => r.MyChildItems));
myContextMock.Setup(m => m.MyChildItems).Returns(myChildItems);
Mock <IMyContextProvider> myContextProvider = new Mock <IMyContextProvider>();
myContextProvider.Setup(m => m.CreateContext()).Returns(myContextMock.Object);
// Act: create the service instance and call UpdateAllChildItemValues operation with a specific argument.
var service = new MyService(myContextProvider.Object);
const string postfix = "(postfix)";
service.UpdateAllChildItemValues(postfix);
// Assert: verify that the context is created, and that the side effects are as expected.
myContextProvider.Verify(m => m.CreateContext());
Assert.IsTrue(myChildItems.All(c => c.MyChildValue.EndsWith($" {postfix}")));
}
public void RemoveItemsTest()
{
// Arrange: set up a context mock with initial collections of root items and child items, exposed through a provider mock.
Mock <IMyContext> myContextMock = new Mock <IMyContext>();
var myRootItems = new DbSetMock <MyRootItem>(MyMockedRootItems);
myContextMock.Setup(m => m.MyRootItems).Returns(myRootItems);
var myChildItems = new DbSetMock <MyChildItem>(MyMockedRootItems.SelectMany(r => r.MyChildItems));
myContextMock.Setup(m => m.MyChildItems).Returns(myChildItems);
Mock <IMyContextProvider> myContextProvider = new Mock <IMyContextProvider>();
myContextProvider.Setup(m => m.CreateContext()).Returns(myContextMock.Object);
// Act: create the service instance and call RemoveItems operation.
var service = new MyService(myContextProvider.Object);
service.RemoveItems();
// Assert: verify that the context is created, and that the side effects are as expected.
myContextProvider.Verify(m => m.CreateContext());
Assert.AreEqual(0, myRootItems.Count());
}