Hands-On Design Patterns with C# and .NET Core

UpdateQuantityCommandTest

UpdateQuantityCommandTest contains a test to validate a scenario where a book is updated in an existing collection. The creation of the expected interface and existing collection are shown in the following code (note that the test involves adding 6 to the quantity of an existing book):

const string expectedBookName = "UpdateQuantityUnitTest";var expectedInterface = new Helpers.TestUserInterface(    new List<Tuple<string, string>>    {        new Tuple<string, string>("Enter name:", expectedBookName),        new Tuple<string, string>("Enter quantity:", "6")    },    new List<string>(),    new List<string>());var context = new TestInventoryContext(new Dictionary<string, Book>{ { "Beavers", new Book { Id = 1, Name = "Beavers", Quantity = 3 } }, ...