public static async Task WriteRecordsAsync_RecordsAreWritten_InformationIsCorrect()
{
var csvWriter = new CsvStreamStreamWriter <CsvHeaderContent, CsvHeaderContentMap>();
await using var stream = new MemoryStream();
var expectedDate = DateTime.UtcNow;
var records = new[] { new CsvHeaderContent {
Created = expectedDate, Name = "Bob Builder"
} };
await csvWriter.WriteRecordsAsync(stream, records);
var attachmentData = new MemoryStream(stream.ToArray());
using var csvText = new TextFieldParser(attachmentData);
csvText.SetDelimiters(",");
string[] csvHeader = { "Name", "Created Date" };
string[] expectedData = { "Bob Builder", expectedDate.ToString("dd/MM/yyyy", CultureInfo.InvariantCulture) };
csvText.ReadFields().Should().BeEquivalentTo(csvHeader);
csvText.EndOfData.Should().BeFalse();
csvText.ReadFields().Should().BeEquivalentTo(expectedData);
csvText.EndOfData.Should().BeTrue();
}
public static void WriteRecordsAsync_StreamIsNull_ThrowsArgumentNullException(bool hasStream, bool hasRecords)
{
var csvWriter = new CsvStreamStreamWriter <CsvHeaderContent, CsvHeaderContentMap>();
Assert.ThrowsAsync <ArgumentNullException>(async() => await csvWriter.WriteRecordsAsync(
hasStream ? new MemoryStream() : null,
hasRecords ? new List <CsvHeaderContent>() : null));
}
public static async Task WriteRecordsAsync_UsesUtf8Encoding()
{
var csvWriter = new CsvStreamStreamWriter <CsvHeaderContent, CsvHeaderContentMap>();
await using var stream = new MemoryStream();
var records = new[] { new CsvHeaderContent {
Created = DateTime.UtcNow, Name = "Bob Builder"
} };
await csvWriter.WriteRecordsAsync(stream, records);
var utf8Preamble = Encoding.UTF8.GetPreamble();
stream.Seek(0, SeekOrigin.Begin);
using var reader = new BinaryReader(stream, Encoding.UTF8);
var csvPreamble = reader.ReadBytes(utf8Preamble.Length);
csvPreamble.Should().BeEquivalentTo(utf8Preamble);
}
