public void NegativeOffset(long offset)
{
// Given that there is a text source
// and the text length is 3
// When Seek is called with a negative offset
// Then an ArgumentOutOfRangeException is thrown
using (var sut = new StringTextSource("abc"))
{
Assert.Throws <ArgumentOutOfRangeException>(() => sut.Seek(offset));
}
}
public void SeekWithoutRecording()
{
// Given that there is a text source
// and the text length is 10
// When reading 1 character
// and seeking to offset 0
// Then an exception is thrown
using (var sut = new StringTextSource("1234567890"))
{
sut.Read(new char[2], 0, 2);
Assert.Throws <ArgumentOutOfRangeException>(() => sut.Seek(0));
}
}
public void SimpleForwardSeek()
{
// Given that there is a text source
// and the text length is 3
// When Seek is called
// and the seek offset is 2
// Then the current offset becomes 2
using (var sut = new StringTextSource("abc"))
{
sut.Seek(2);
Assert.Equal(2, sut.Offset);
}
}