public async void Handle_ShouldReturnPostAndIgnoreCase_IfValidSlug()
{
// Arrange
const string slug = "A-POST-SLUG";
await th.CreatePost(new Post { Slug = slug });
var query = new GetPost.Query(slug.ToLower());
var postDto = new PostDto();
mapper.Setup(x => x.Map <Post, PostDto>(It.IsAny <Post>())).Returns(postDto);
// Act
var result = await sut.Handle(query, default);
// Assert
Assert.Equal(postDto, result.Value);
}