public void GetLineColumnFromPositionTest()
{
var tb = new TextBufferMock("a\r\nb", "R");
int line, col;
tb.GetLineColumnFromPosition(0, out line, out col);
line.Should().Be(0);
col.Should().Be(0);
tb.GetLineColumnFromPosition(1, out line, out col);
line.Should().Be(0);
col.Should().Be(1);
tb.GetLineColumnFromPosition(3, out line, out col);
line.Should().Be(1);
col.Should().Be(0);
}