CaptureHttpTrafficTests.cs

[Test]
public void TestNoLargeImages_When_NavigateToHomePage()
{
    _driver.Navigate().GoToUrl("https://automatetheplanet.com/");

    AssertNoLargeImagesRequested();
}

private void AssertNoLargeImagesRequested()
{
    bool areThereLargeImages = 
        _requestsHistory.Values.Any(r => 
        r.ContentType != null 
        && r.ContentType.StartsWith("image") 
        && r.ContentLength < 40000);
    Assert.IsFalse(areThereLargeImages);
}