public async void Delete_ShouldRemoveUserFromDatabase_WhenUserHaSpecifiedId()
{
var loggerMock = new Mock <ILogger <UserService> >();
var contextMock = new Mock <IDatabaseContext>();
var user = GetUserSample("name", "password");
var dbSet = new TestDbSet <User>();
dbSet.Add(user);
contextMock.Setup(x => x.Users)
.Returns(dbSet);
contextMock.Setup(x => x.SaveChanges())
.Verifiable();
var userService = new UserService(loggerMock.Object, contextMock.Object);
await userService.DeleteAsync(user.Id);
Assert.True(!dbSet.Any(x => x.Id == user.Id));
contextMock.Verify(x => x.SaveChanges());
}