public void PerformBorrowingProcess_CanFetchBorrowingDetails() { var bookId = _screenHelper.Object.GetBookId(); var reader = _screenHelper.Object.GetNewReader(); var days = _screenHelper.Object.GetBorrowDays(); _borrow.PerformBorrowingProcess(); _bookRepository.Verify(b => b.BorrowABook(bookId, reader, days), Times.Once); }