public void CanReadWrite()
{
var sut = _fixture.Create <DbaseFileHeader>();
using (var stream = new MemoryStream())
{
using (var writer = new BinaryWriter(stream, Encoding.ASCII, true))
{
sut.Write(writer);
writer.Flush();
}
stream.Position = 0;
using (var reader = new BinaryReader(stream, Encoding.ASCII, true))
{
var result = DbaseFileHeader.Read(reader);
Assert.Equal(sut.LastUpdated, result.LastUpdated);
Assert.Equal(sut.CodePage, result.CodePage);
Assert.Equal(sut.RecordCount, result.RecordCount);
Assert.Equal(sut.Schema, result.Schema);
}
}
}
public void ReadExpectsHeaderToNotExceedFieldCount()
{
var sut = _fixture.Create <DbaseFileHeader>();
using (var stream = new MemoryStream())
{
using (var writer = new BinaryWriter(stream, Encoding.ASCII, true))
{
writer.Write(Convert.ToByte(3));
writer.Write(Convert.ToByte(sut.LastUpdated.Year - 1900));
writer.Write(Convert.ToByte(sut.LastUpdated.Month));
writer.Write(Convert.ToByte(sut.LastUpdated.Day));
writer.Write(sut.RecordCount.ToInt32());
var headerLength = DbaseFileHeader.HeaderMetaDataSize + (DbaseFileHeader.FieldMetaDataSize * 129);
writer.Write(Convert.ToInt16(headerLength));
writer.Flush();
}
stream.Position = 0;
using (var reader = new BinaryReader(stream, Encoding.ASCII, true))
{
Assert.Throws <DbaseFileHeaderException>(
() => DbaseFileHeader.Read(reader)
);
}
}
}
public void ReadExpectsHeaderToEndWithTerminator()
{
var terminator = _fixture.Create <Generator <byte> >().Where(_ => _ != DbaseFileHeader.Terminator).First();
var sut = _fixture.Create <DbaseFileHeader>();
using (var outputStream = new MemoryStream())
{
using (var writer = new BinaryWriter(outputStream, Encoding.ASCII, true))
{
sut.Write(writer);
writer.Flush();
}
var buffer = outputStream.ToArray();
using (var inputStream = new MemoryStream())
{
inputStream.Write(buffer, 0, buffer.Length - 1);
inputStream.Write(new[] { terminator }, 0, 1);
inputStream.Position = 0;
using (var reader = new BinaryReader(inputStream, Encoding.ASCII, true))
{
Assert.Throws <DbaseFileHeaderException>(
() => DbaseFileHeader.Read(reader)
);
}
}
}
}
public void ReadExpectsHeaderToHaveSupportedCodePage()
{
var allSupported = Array.ConvertAll(DbaseCodePage.All, _ => _.ToByte());
var codePage = new Generator <byte>(_fixture)
.First(candidate => !Array.Exists(allSupported, supported => supported == candidate));
using (var stream = new MemoryStream())
{
using (var writer = new BinaryWriter(stream, Encoding.ASCII, true))
{
writer.Write(Convert.ToByte(3));
writer.Write(Convert.ToByte(0));
writer.Write(Convert.ToByte(1));
writer.Write(Convert.ToByte(1));
writer.Write(0);
var headerLength = DbaseFileHeader.HeaderMetaDataSize + (DbaseFileHeader.FieldMetaDataSize * 1);
writer.Write(Convert.ToInt16(headerLength));
writer.Write(Convert.ToInt16(0));
writer.Write(new byte[17]);
writer.Write(codePage);
writer.Flush();
}
stream.Position = 0;
using (var reader = new BinaryReader(stream, Encoding.ASCII, true))
{
Assert.Throws <DbaseFileHeaderException>(
() => DbaseFileHeader.Read(reader)
);
}
}
}
public void WriteOneHasExpectedResult()
{
var expectedHeader = _fixture.Create <DbaseFileHeader>();
var expectedRecord = _fixture.GenerateDbaseRecord(expectedHeader.Schema.Fields);
using (var stream = new MemoryStream())
{
using (var sut = new DbaseBinaryWriter(expectedHeader, new BinaryWriter(stream, Encoding.ASCII, true)))
{
//Act
sut.Write(expectedRecord);
}
// Assert
stream.Position = 0;
using (var reader = new BinaryReader(stream, Encoding.ASCII, true))
{
var actualHeader = DbaseFileHeader.Read(reader);
var actualRecord = new AnonymousDbaseRecord(actualHeader.Schema.Fields);
actualRecord.Read(reader);
var actualEndOfFile = reader.ReadByte();
Assert.Equal(expectedHeader, actualHeader);
Assert.Equal(expectedRecord, actualRecord, new DbaseRecordEqualityComparer());
Assert.Equal(DbaseRecord.EndOfFile, actualEndOfFile);
}
}
}
public void ReadExpectsCorrectFieldsOffsets(DbaseField[] fields)
{
var lastUpdated = _fixture.Create <DateTime>();
var codePage = _fixture.Create <DbaseCodePage>();
var recordCount = _fixture.Create <DbaseRecordCount>();
var length = fields.Aggregate(DbaseRecordLength.Initial, (current, field) => current.Plus(field.Length));
using (var stream = new MemoryStream())
{
using (var writer = new BinaryWriter(stream, Encoding.ASCII, true))
{
writer.Write(Convert.ToByte(3));
writer.Write(Convert.ToByte(lastUpdated.Year - 1900));
writer.Write(Convert.ToByte(lastUpdated.Month));
writer.Write(Convert.ToByte(lastUpdated.Day));
writer.Write(recordCount.ToInt32());
var headerLength = DbaseFileHeader.HeaderMetaDataSize +
(DbaseFileHeader.FieldMetaDataSize * fields.Length);
writer.Write(Convert.ToInt16(headerLength));
writer.Write(length.ToInt16());
writer.Write(new byte[17]);
writer.Write(codePage.ToByte());
writer.Write(new byte[2]);
foreach (var field in fields)
{
field.Write(writer);
}
writer.Write(DbaseFileHeader.Terminator);
writer.Flush();
}
stream.Position = 0;
using (var reader = new BinaryReader(stream, Encoding.ASCII, true))
{
Assert.Throws <DbaseFileHeaderException>(
() => DbaseFileHeader.Read(reader)
);
}
}
}
public void ReadExpectsHeaderRecordLengthToMatchSchemaRecordLength()
{
var sut = _fixture.Create <DbaseFileHeader>();
var length = _fixture.Create <Generator <DbaseRecordLength> >().First(_ => _ != sut.Schema.Length);
using (var stream = new MemoryStream())
{
using (var writer = new BinaryWriter(stream, Encoding.ASCII, true))
{
writer.Write(Convert.ToByte(3));
writer.Write(Convert.ToByte(sut.LastUpdated.Year - 1900));
writer.Write(Convert.ToByte(sut.LastUpdated.Month));
writer.Write(Convert.ToByte(sut.LastUpdated.Day));
writer.Write(sut.RecordCount.ToInt32());
var headerLength = DbaseFileHeader.HeaderMetaDataSize +
(DbaseFileHeader.FieldMetaDataSize * sut.Schema.Fields.Length);
writer.Write(Convert.ToInt16(headerLength));
writer.Write(length.ToInt16());
writer.Write(new byte[17]);
writer.Write(sut.CodePage.ToByte());
writer.Write(new byte[2]);
foreach (var recordField in sut.Schema.Fields)
{
recordField.Write(writer);
}
writer.Write(DbaseFileHeader.Terminator);
writer.Flush();
}
stream.Position = 0;
using (var reader = new BinaryReader(stream, Encoding.ASCII, true))
{
Assert.Throws <DbaseFileHeaderException>(
() => DbaseFileHeader.Read(reader)
);
}
}
}
public void WriteManyHasExpectedResult()
{
var expectedHeader = _fixture.Create <DbaseFileHeader>();
var expectedRecords =
_fixture.GenerateDbaseRecords(expectedHeader.Schema.Fields, expectedHeader.RecordCount);
using (var stream = new MemoryStream())
{
using (var sut = new DbaseBinaryWriter(expectedHeader, new BinaryWriter(stream, Encoding.ASCII, true)))
{
//Act
foreach (var expectedRecord in expectedRecords)
{
sut.Write(expectedRecord);
}
}
// Assert
stream.Position = 0;
using (var reader = new BinaryReader(stream, Encoding.ASCII, true))
{
var actualHeader = DbaseFileHeader.Read(reader);
var actualRecords = new DbaseRecord[actualHeader.RecordCount.ToInt32()];
for (var index = 0; index < actualRecords.Length; index++)
{
var actualRecord = new AnonymousDbaseRecord(actualHeader.Schema.Fields);
actualRecord.Read(reader);
actualRecords[index] = actualRecord;
}
var actualEndOfFile = reader.ReadByte();
Assert.Equal(expectedHeader, actualHeader);
Assert.Equal(expectedRecords, actualRecords, new DbaseRecordEqualityComparer());
Assert.Equal(DbaseRecord.EndOfFile, actualEndOfFile);
}
}
}
public void ReadExpectsHeaderToStartWithDbase3Format()
{
var start = _fixture.Create <Generator <byte> >().Where(_ => _ != DbaseFileHeader.ExpectedDbaseFormat).First();
using (var stream = new MemoryStream())
{
using (var writer = new BinaryWriter(stream, Encoding.ASCII, true))
{
writer.Write(start);
writer.Flush();
}
stream.Position = 0;
using (var reader = new BinaryReader(stream, Encoding.ASCII, true))
{
Assert.Throws <DbaseFileHeaderException>(
() => DbaseFileHeader.Read(reader)
);
}
}
}
public void ReaderCanNotBeNull()
{
new GuardClauseAssertion(_fixture)
.Verify(Methods.Select(() => DbaseFileHeader.Read(null)));
}