public void when_get_free_port_it_should_find_same_port_few_times()
{
var freePort = NetworkTools.GetFreeTcpPort();
NetworkTools.GetFreeTcpPort().Should().Be(freePort);
NetworkTools.GetFreeTcpPort().Should().Be(freePort);
}
public void when_there_is_no_free_ports_in_range_it_should_fail()
{
const ushort rangeStart = 50000;
const ushort rangeFinish = 50002;
var occupiedPorts = OccupyPortRange(rangeStart, rangeFinish).ToArray();
Action sut = () => NetworkTools.GetFreeTcpPort(rangeStart, rangeFinish);
sut.Should().ThrowExactly <ArgumentException>().Which.Message.Should().Contain("range");
FreePortRange(occupiedPorts);
}