public void CtorTest()
{
var target = new Uri("https://www.baidu.com/");
var uri = "http://localhost:5533/";
var proxy = new HttpProxy(uri);
Assert.True(proxy.Host == "localhost" && proxy.Port == 5533);
Assert.True(proxy.GetProxy(target) == new Uri(uri));
Assert.True(proxy.UserName == null);
Assert.True(((IWebProxy)proxy).Credentials == null);
proxy = new HttpProxy(new Uri(uri));
Assert.True(proxy.Host == "localhost" && proxy.Port == 5533);
Assert.True(proxy.GetProxy(target) == new Uri(uri));
Assert.True(proxy.UserName == null);
Assert.True(((IWebProxy)proxy).Credentials == null);
proxy = new HttpProxy("localhost", 5533, "laojiu", "123456");
Assert.True(proxy.Host == "localhost" && proxy.Port == 5533);
Assert.True(proxy.GetProxy(target) == new Uri(uri));
Assert.True(proxy.UserName == "laojiu");
Assert.True(proxy.Password == "123456");
Assert.True(((IWebProxy)proxy).Credentials.GetCredential(null, null).UserName == "laojiu");
Assert.True(((IWebProxy)proxy).Credentials.GetCredential(null, null).Password == "123456");
}