public void TryReadRecord_MultipleRecordsWithHeader_RecordsAreRead()
{
var headerBytes = new byte[4];
var record1Bytes = BitConverter.GetBytes((int)100).Concat("Record 1".Select(x => (byte)x).ToArray()).Concat(new byte[] { 0, 0 });
var record2Bytes = BitConverter.GetBytes((int)200).Concat("Record 2".Select(x => (byte)x).ToArray()).Concat(new byte[] { 0, 0 });
var fileBytes = headerBytes.Concat(record1Bytes).Concat(record2Bytes).ToArray();
File.WriteAllBytes(this.FilePath, fileBytes);
using (var fileReader = new FixedWidthBinaryFileReader(this.FilePath))
{
fileReader.HeaderSize = 4;
fileReader.RecordSize = 14;
fileReader.FooterSize = 0;
fileReader.Open();
var couldReadRecord1 = fileReader.TryReadRecord(out var record1, out var failures1);
var couldReadRecord2 = fileReader.TryReadRecord(out var record2, out var failures2);
var couldReadRecord3 = fileReader.TryReadRecord(out var record3, out var failures3);
Assert.IsTrue(couldReadRecord1);
Assert.IsTrue(couldReadRecord2);
Assert.IsFalse(couldReadRecord3);
Assert.IsNull(failures1);
Assert.IsNull(failures2);
FixedWidthBinaryFileReaderTests.AssertRecordMatches((byte[])record1, 100, "Record 1");
FixedWidthBinaryFileReaderTests.AssertRecordMatches((byte[])record2, 200, "Record 2");
}
}
public void TryReadRecord_InvalidHeader_ExceptionIsThrown()
{
var fileBytes = new byte[] { 0, 0 };
File.WriteAllBytes(this.FilePath, fileBytes);
using (var fileReader = new FixedWidthBinaryFileReader(this.FilePath))
{
fileReader.HeaderSize = 4;
fileReader.RecordSize = 14;
fileReader.FooterSize = 2;
fileReader.Open();
fileReader.TryReadRecord(out var record1, out var failures1);
}
}
public void TryReadRecord_ZeroRecords_ZeroRecordsAreRead()
{
var fileBytes = new byte[0];
File.WriteAllBytes(this.FilePath, fileBytes);
using (var fileReader = new FixedWidthBinaryFileReader(this.FilePath))
{
fileReader.HeaderSize = 0;
fileReader.RecordSize = 14;
fileReader.FooterSize = 0;
fileReader.Open();
var couldReadRecord1 = fileReader.TryReadRecord(out var record1, out var failures1);
Assert.IsFalse(couldReadRecord1);
}
}
public void TryReadRecord_InvalidRecord_ExceptionIsThrown()
{
var headerBytes = new byte[4];
var footerBytes = new byte[2];
var record1Bytes = BitConverter.GetBytes((int)100).Concat("Rec".Select(x => (byte)x).ToArray());
var fileBytes = headerBytes.Concat(record1Bytes).Concat(footerBytes).ToArray();
File.WriteAllBytes(this.FilePath, fileBytes);
using (var fileReader = new FixedWidthBinaryFileReader(this.FilePath))
{
fileReader.HeaderSize = 4;
fileReader.RecordSize = 14;
fileReader.FooterSize = 2;
fileReader.Open();
fileReader.TryReadRecord(out var record1, out var failures1);
fileReader.TryReadRecord(out var record2, out var failures2);
}
}
public void TryReadRecord_ZeroRecordsWithHeaderAndFooter_ZeroRecordsAreRead()
{
var headerBytes = new byte[4];
var footerBytes = new byte[2];
var fileBytes = headerBytes.Concat(footerBytes).ToArray();
File.WriteAllBytes(this.FilePath, fileBytes);
using (var fileReader = new FixedWidthBinaryFileReader(this.FilePath))
{
fileReader.HeaderSize = 4;
fileReader.RecordSize = 14;
fileReader.FooterSize = 2;
fileReader.Open();
var couldReadRecord1 = fileReader.TryReadRecord(out var record1, out var failures1);
Assert.IsFalse(couldReadRecord1);
}
}
