public void ExportAllJournalsWithNullStreamThrowsArgumentNullException()
{
// Arrange
var journalsExport = new JournalsExport(Mock.Of<IJournalRepository>());
Stream nullStream = null;
// Act
// Assert
Assert.Throws<ArgumentNullException>(() => journalsExport.ExportAllJournals(nullStream));
}
public void ExportAllJournalsExportAllJournalsInCorrectCsvFormat()
{
// Arrange
var mockJournalRepository = new Mock<IJournalRepository>();
mockJournalRepository.Setup(j => j.AllIncluding(It.IsAny<Expression<Func<Journal, object>>[]>())).Returns(CreateJournals());
var journalsExport = new JournalsExport(mockJournalRepository.Object);
var memoryStream = new MemoryStream();
// Act
journalsExport.ExportAllJournals(memoryStream);
// Assert
var csvContent = Encoding.Default.GetString(memoryStream.ToArray());
Assert.Equal(ExpectedJournalsCsv, csvContent);
}