public void SeekReaderBackwardToMatchByteSignature_WhenReaderNull_Throws()
{
var exception = Assert.Throws <ArgumentNullException>(
() => SignedPackageArchiveIOUtility.SeekReaderBackwardToMatchByteSignature(
reader: null,
byteSignature: new byte[] { 0 }));
Assert.Equal("reader", exception.ParamName);
}
public void SeekReaderBackwardToMatchByteSignature_WhenByteSignatureNullOrEmpty_Throws(byte[] byteSignature)
{
using (var test = new ReadTest())
{
test.Reader.BaseStream.Seek(offset: 0, origin: SeekOrigin.End);
var exception = Assert.Throws <ArgumentException>(
() => SignedPackageArchiveIOUtility.SeekReaderBackwardToMatchByteSignature(
test.Reader,
byteSignature));
Assert.Equal("byteSignature", exception.ParamName);
Assert.Equal(test.Reader.BaseStream.Length, test.Reader.BaseStream.Position);
}
}
public void SeekReaderBackwardToMatchByteSignature_WhenInitialPositionNearEndAndByteSignatureNotFound_Throws()
{
using (var test = new ReadTest())
{
var byteSignature = new byte[] { 3, 2 };
test.Reader.BaseStream.Seek(offset: -byteSignature.Length, origin: SeekOrigin.End);
Assert.Throws <InvalidDataException>(
() => SignedPackageArchiveIOUtility.SeekReaderBackwardToMatchByteSignature(
test.Reader,
byteSignature));
Assert.Equal(4, test.Reader.BaseStream.Position);
}
}
public void SeekReaderBackwardToMatchByteSignature_WhenInitialPositionNearEndAndByteSignatureAtStart_Seeks()
{
using (var test = new ReadTest())
{
var byteSignature = new byte[] { 0, 1 };
test.Reader.BaseStream.Seek(offset: -byteSignature.Length, origin: SeekOrigin.End);
SignedPackageArchiveIOUtility.SeekReaderBackwardToMatchByteSignature(test.Reader, byteSignature);
Assert.Equal(0, test.Reader.BaseStream.Position);
var actual = test.Reader.ReadBytes(byteSignature.Length);
Assert.Equal(byteSignature, actual);
}
}
public void SeekReaderBackwardToMatchByteSignature_WhenInitialPositionAtEnd_Throws()
{
using (var test = new ReadTest())
{
var byteSignature = new byte[] { 2, 3 };
test.Reader.BaseStream.Seek(offset: 0, origin: SeekOrigin.End);
var exception = Assert.Throws <ArgumentOutOfRangeException>(
() => SignedPackageArchiveIOUtility.SeekReaderBackwardToMatchByteSignature(
test.Reader,
byteSignature));
Assert.Equal("byteSignature", exception.ParamName);
Assert.Equal(test.Reader.BaseStream.Length, test.Reader.BaseStream.Position);
}
}
public void SeekReaderBackwardToMatchByteSignature_WhenByteSignatureNotFound_MessageContainsByteSignature()
{
using (var test = new ReadTest())
{
var byteSignature = new byte[] { 6, 7 };
test.Reader.BaseStream.Seek(offset: -byteSignature.Length, origin: SeekOrigin.End);
var exception = Assert.Throws <InvalidDataException>(
() => SignedPackageArchiveIOUtility.SeekReaderBackwardToMatchByteSignature(
test.Reader,
byteSignature));
Assert.Contains(BitConverter.ToString(byteSignature).Replace("-", ""), exception.Message);
Assert.Equal(4, test.Reader.BaseStream.Position);
}
}