private void VerifyNoImposterWasRetrieved()
 {
     _retrievedImposter.Should().BeNull();
 }
 private void VerifyImposterWasRetrieved()
 {
     _retrievedImposter.Should().NotBeNull("Expected imposter to have been retrieved");
     _retrievedImposter.Port.Should().Equals(_imposter.Port);
 }
 private void VerifyRequestProxiedToSource()
 {
     _retrievedImposter.Should().NotBeNull("Expected imposter to have been retrieved");
     _retrievedImposter.NumberOfRequests.Should().Be(1);
 }