public async Task Load_ShouldCreateBookWithSameNumberOfLedgers()
{
XamlOnDiskLedgerBookRepository subject = CreateSubject();
var book = await subject.LoadAsync(LoadFileName, false);
var testData2 = LedgerBookTestData.TestData2();
Assert.AreEqual(testData2.Ledgers.Count(), book.Ledgers.Count());
}