BudgetAnalyser.Engine.Ledger.LedgerBook.UnlockMostRecentLine C# (CSharp) Method

        internal LedgerEntryLine UnlockMostRecentLine()
        {
            var line = Reconciliations.FirstOrDefault();
            line?.Unlock();

            return line;
        }
    }

        public void UnlockMostRecentLineShouldNotThrowIfBookIsEmpty()
        {
            var subject = new LedgerBook(new FakeLogger())
            {
                Name = "Foo", Modified = new DateTime(2011, 12, 4), FileName = @"C:\TestLedgerBook.xml",
            };
            LedgerEntryLine result = subject.UnlockMostRecentLine();

            Assert.IsNull(result);
        }