public async Task Should_return_null_when_no_author_found()
{
// Arrange
string author = Guid.NewGuid().ToString();
IEnumerable <Item> expectedData = MockDataItems.Where(i => i.Author == author);
ItemRepositoryMock.Setup(x => x.GetItemsByAuthorAsync(author, default(CancellationToken))).ReturnsAsync(expectedData);
// Act
IEnumerable <Item> resultItems = await ServiceUnderTest.GetItemsByAuthorAsync(author, default(CancellationToken));
// Assert
Assert.Null(resultItems);
}
public async Task Should_return_single_item_by_identity()
{
// Arrange
Item expectedResult = MockDataItems[1];
string id = expectedResult.Id;
ItemRepositoryMock.Setup(x => x.GetItemByIdAsync(id, default(CancellationToken))).ReturnsAsync(expectedResult);
// Act
Item resultItem = await ServiceUnderTest.GetItemByIdAsync(id, default(CancellationToken));
// Assert
Assert.Same(expectedResult, resultItem);
}
public async Task Should_return_items_by_author()
{
// Arrange
string author = MockDataItems[2].Author;
IEnumerable <Item> expectedData = MockDataItems.Where(i => i.Author == author);
ItemRepositoryMock.Setup(x => x.GetItemsByAuthorAsync(author, default(CancellationToken))).ReturnsAsync(expectedData);
// Act
IEnumerable <Item> resultItems = await ServiceUnderTest.GetItemsByAuthorAsync(author, default(CancellationToken));
// Assert
Assert.Same(expectedData, resultItems);
}
public async Task Should_fail_update_missing_identity()
{
// Arrange
Item newItem = new Item {
Id = string.Empty, Author = "Jane Smith", HideAuthor = true, Title = "Adding new items is too simple", Description = "I think it needs to have more clicks to add an item", Votes = -7
};
ItemRepositoryMock.Setup(x => x.UpdateItemAsync(newItem, default(CancellationToken))).ReturnsAsync(newItem.Id);
// Act
ArgumentNullException exception = await Assert.ThrowsAsync <ArgumentNullException>(() => ServiceUnderTest.UpdateItemAsync(newItem, default(CancellationToken)));
// Assert
Assert.Equal(nameof(newItem.Id), exception.ParamName);
}
public async Task Should_return_null_when_no_match()
{
// Arrange
Item badResult = new Item {
Id = Guid.NewGuid().ToString(), Author = "Bob Marley", HideAuthor = true, Title = "No women", Description = "No cry", Votes = 2
};
ItemRepositoryMock.Setup(x => x.GetItemByIdAsync(badResult.Id, default(CancellationToken))).ReturnsAsync(MockDataItems.FirstOrDefault(i => i.Id == badResult.Id));
// Act
Item resultItem = await ServiceUnderTest.GetItemByIdAsync(badResult.Id, default(CancellationToken));
// Assert
Assert.Null(resultItem);
}
public async Task Should_update_an_existing_item()
{
// Arrange
Item newItem = new Item {
Id = Guid.NewGuid().ToString(), Author = "Jane Smith", HideAuthor = true, Title = "Adding new items is too simple", Description = "I think it needs to have more clicks to add an item", Votes = -7
};
ItemRepositoryMock.Setup(x => x.UpdateItemAsync(newItem, default(CancellationToken))).ReturnsAsync(newItem.Id);
ItemRepositoryMock.Setup(x => x.GetItemByIdAsync(newItem.Id, default(CancellationToken))).ReturnsAsync(newItem);
// Act
Item resultItem = await ServiceUnderTest.UpdateItemAsync(newItem, default(CancellationToken));
// Assert
Assert.Equal(newItem, resultItem);
}
public async Task Should_create_new_item()
{
// Arrange
Item newItem = new Item {
Id = Guid.NewGuid().ToString(), Author = "J. K. Rowling", HideAuthor = false, Title = "Fly Phising", Description = "I was wondering if you could tell if you have a book...", Votes = 0
};
ItemRepositoryMock.Setup(x => x.CreateNewItemAsync(newItem, default(CancellationToken))).ReturnsAsync(newItem.Id);
ItemRepositoryMock.Setup(x => x.GetItemByIdAsync(newItem.Id, default(CancellationToken))).ReturnsAsync(newItem);
// Act
Item resultItem = await ServiceUnderTest.CreateItemAsync(newItem, default(CancellationToken));
// Assert
Assert.Same(newItem, resultItem);
}
