dotnet/test/common/NetworkInterceptionTests.cs

// <copyright file="NetworkInterceptionTests.cs" company="Selenium Committers">
// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The SFC licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
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// </copyright>

using NUnit.Framework;
using OpenQA.Selenium.DevTools;
using System.Threading.Tasks;

namespace OpenQA.Selenium
{
    [TestFixture]
    public class NetworkInterceptionTests : DriverTestFixture
    {
        [TearDown]
        public void RemoveHandlers()
        {
            if (driver is IDevTools)
            {
                INetwork network = driver.Manage().Network;
                network.ClearAuthenticationHandlers();
                network.ClearRequestHandlers();
                network.ClearResponseHandlers();
            }
        }

        [Test]
        [IgnoreBrowser(Browser.Firefox, "Firefox does not implement the CDP Fetch domain required for network interception")]
        public async Task TestCanInterceptNetworkCalls()
        {
            if (driver is IDevTools)
            {
                INetwork network = driver.Manage().Network;
                NetworkResponseHandler handler = new NetworkResponseHandler();
                handler.ResponseMatcher = (responseData) => responseData.Url.Contains("simpleTest.html");
                handler.ResponseTransformer = (responseData) =>
                {
                    responseData.Body = "<html><body><p>I intercepted you</p></body></html>";
                    return responseData;
                };
                network.AddResponseHandler(handler);
                await network.StartMonitoring();
                driver.Url = simpleTestPage;
                string text = driver.FindElement(By.CssSelector("p")).Text;
                await network.StopMonitoring();
                Assert.That(text, Is.EqualTo("I intercepted you"));
            }
        }

        [Test]
        [IgnoreBrowser(Browser.Firefox, "Firefox does not implement the CDP Fetch domain required for network interception")]
        public async Task TestCanUseAuthorizationHandler()
        {
            if (driver is IDevTools)
            {
                INetwork network = driver.Manage().Network;
                NetworkAuthenticationHandler handler = new NetworkAuthenticationHandler()
                {
                    UriMatcher = (uri) => uri.PathAndQuery.Contains("basicAuth"),
                    Credentials = new PasswordCredentials("test", "test")
                };
                network.AddAuthenticationHandler(handler);
                await network.StartMonitoring();
                driver.Url = authenticationPage;
                string text = driver.FindElement(By.CssSelector("h1")).Text;
                await network.StopMonitoring();
                Assert.That(text, Is.EqualTo("authorized"));
            }
        }

        [Test]
        [IgnoreBrowser(Selenium.Browser.Firefox, "Firefox does not support Chrome DevTools Protocol")]
        public async Task TransformNetworkResponse()
        {
            if (driver is IDevTools)
            {
                var handler = new NetworkResponseHandler()
                {
                    ResponseMatcher = _ => true,
                    ResponseTransformer = _ => new HttpResponseData
                    {
                        StatusCode = 200,
                        Body = "Creamy, delicious cheese!"
                    }
                };
                INetwork networkInterceptor = driver.Manage().Network;
                networkInterceptor.AddResponseHandler(handler);
                await networkInterceptor.StartMonitoring();

                driver.Navigate().GoToUrl("https://www.selenium.dev");
                await networkInterceptor.StopMonitoring();

                var body = driver.FindElement(By.TagName("body"));
                Assert.AreEqual("Creamy, delicious cheese!", body.Text);
            }
        }
    }
}