public void TestCalculateVisibleSection1()
{
var logFile = new Mock <ILogSource>();
logFile.Setup(x => x.GetProperty(Properties.LogEntryCount)).Returns(1);
_control.LogSource = logFile.Object;
_control.CurrentLine = 600;
var section = _control.CalculateVisibleSection();
section.Should().Equal(new LogSourceSection(0, 1), "because the control should clamp the visible section until something better becomes available");
}