public async Task DeleteByIdAsync_WithNonExistentId_ShouldThrowArgumentNullException()
{
// Arrange
MapperInitializer.InitializeMapper();
var context = ApplicationDbContextInMemoryFactory.InitializeContext();
var shoppingListRepository = new EfDeletableEntityRepository <ShoppingList>(context);
var shoppingListService = new ShoppingListService(shoppingListRepository);
var nonExistentId = Guid.NewGuid().ToString();
// Act
// Assert
await Assert.ThrowsAsync <ArgumentNullException>(async() =>
{
await shoppingListService.DeleteByIdAsync(nonExistentId);
});
}
public async Task DeleteByIdAsync_WithExistentId_ShouldReturnCorrectResult()
{
var errorMessagePrefix = "ShoppingListService DeleteByIdAsync() method does not work properly.";
// Arrange
MapperInitializer.InitializeMapper();
var context = ApplicationDbContextInMemoryFactory.InitializeContext();
await this.SeedDataAsync(context);
var shoppingListRepository = new EfDeletableEntityRepository <ShoppingList>(context);
var shoppingListService = new ShoppingListService(shoppingListRepository);
var existentId = shoppingListRepository.All().First().Id;
// Act
var result = await shoppingListService.DeleteByIdAsync(existentId);
// Assert
Assert.True(result, errorMessagePrefix + " " + "Returns false.");
}
public async Task DeleteByIdAsync_WithExistentId_ShouldSuccessfullyDelete()
{
var errorMessagePrefix = "ShoppingListService DeleteByIdAsync() method does not work properly.";
// Arrange
MapperInitializer.InitializeMapper();
var context = ApplicationDbContextInMemoryFactory.InitializeContext();
await this.SeedDataAsync(context);
var shoppingListRepository = new EfDeletableEntityRepository <ShoppingList>(context);
var shoppingListService = new ShoppingListService(shoppingListRepository);
var existentId = shoppingListRepository.All().First().Id;
// Act
var shoppingListsCount = shoppingListRepository.All().Count();
await shoppingListService.DeleteByIdAsync(existentId);
var actualResult = shoppingListRepository.All().Count();
var expectedResult = shoppingListsCount - 1;
// Assert
Assert.True(actualResult == expectedResult, errorMessagePrefix + " " + "ShoppingLists count is not reduced.");
}