public async void TestFindByIdAsync()
{
Mock <IUnitOfWork> uowMock = new Mock <IUnitOfWork>();
Mock <IRepository <Post> > repoMock = new Mock <IRepository <Post> >();
var posts = Enumerable.Range(0, 5).Select(x => new Post()
{
Id = x,
Url = string.Format("www.someurl{0}", x)
}).ToList();
for (int i = 0; i < posts.Count; i++)
{
posts[i].PostComments.Add(new PostComment()
{
Comment = string.Format("some test comment {0}", i)
});
}
repoMock.Setup(moq => moq.GetIncludingAsync(
It.IsInRange(0, 5, Range.Inclusive),
new[] { It.IsAny <Expression <Func <Post, object> > >() }))
.Returns(
(int id, Expression <Func <Post, object> >[] includes) =>
Task.FromResult(posts.SingleOrDefault(x => x.Id == id)));
SomeService service = new SomeService(uowMock.Object, repoMock.Object);
var retrievedPost = await service.FindByIdAsync(2);
Assert.AreEqual(2, retrievedPost.Id);
}
public async Task TestFindByIdAsync()
{
var posts = Enumerable.Range(0, 5).Select(x => new Post()
{
Id = x,
Url = string.Format("www.someurl{0}", x)
}).ToList();
for (int i = 0; i < posts.Count; i++)
{
posts[i].PostComments.Add(new PostComment()
{
Comment = string.Format("some test comment {0}", i)
});
}
var queryablePosts = posts.AsQueryable();
var dbsetMock = new Mock <DbSet <Post> >();
dbsetMock.As <IDbAsyncEnumerable <Post> >()
.Setup(m => m.GetAsyncEnumerator())
.Returns(new TestDbAsyncEnumerator <Post>(queryablePosts.GetEnumerator()));
dbsetMock.As <IQueryable <Post> >()
.Setup(m => m.Provider)
.Returns(new TestDbAsyncQueryProvider <Post>(queryablePosts.Provider));
dbsetMock.As <IQueryable <Post> >().Setup(m => m.Expression).Returns(queryablePosts.Expression);
dbsetMock.As <IQueryable <Post> >().Setup(m => m.ElementType).Returns(queryablePosts.ElementType);
dbsetMock.As <IQueryable <Post> >().Setup(m => m.GetEnumerator()).Returns(queryablePosts.GetEnumerator());
//NOTE : we need to use the string version of Include as the other one that accepts
// an Expression tree is an extension method in System.Data.Entity.QueryableExtensions
// which Moq doesn't like
//
// So the following will not work, as will result in this sort of Exception from Moq
//
// Expression references a method that does not belong to
// the mocked object: m => m.Include<Post,IEnumerable`1>(It.IsAny<Expression`1>())
//
// dbsetMock.Setup(m => m.Include(It.IsAny<Expression<Func<Post,IEnumerable<PostComment>>>>()))
// .Returns(dbsetMock.Object);
dbsetMock.Setup(m => m.Include("PostComments")).Returns(dbsetMock.Object);
var mockContext = new Mock <SachaContextTestDouble>();
mockContext.Setup(c => c.Posts).Returns(dbsetMock.Object);
var service = new SomeService(mockContext.Object);
var retrievedPost = await service.FindByIdAsync(1);
Assert.AreEqual(retrievedPost.Id, 1);
Assert.IsNotNull(retrievedPost.PostComments);
Assert.AreEqual(retrievedPost.PostComments.Count, 1);
}
