public void Get_LibraryCard_By_Id()
{
var mockSet = BuildMock();
var mockCtx = new Mock <LibraryDbContext>();
mockCtx.Setup(c => c.LibraryCards).Returns(mockSet.Object);
var sut = new LibraryCardService(mockCtx.Object);
var queryResult = sut.Get(2);
queryResult.Should().BeEquivalentTo(new LibraryCard {
Id = 2
});
}