_csharp

TL;DR - Show Me The Code

6-open-new-window/code/csharp/NewWindowNewTabTest.cs

using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using OpenQA.Selenium;
using OpenQA.Selenium.Firefox;

namespace csharp
{
    [TestClass]
    public class NewWindowNewTabTest
    {
        IWebDriver _driver;

        [TestInitialize]
        public void SetUp()
        {
            _driver = new FirefoxDriver();
        }

        [TestCleanup]
        public void TearDown()
        {
            _driver.Quit();
        }

        [TestMethod]
        public void NewWindowTest()
        {
            _driver.Navigate().GoToUrl("https://the-internet.herokuapp.com/windows");
            _driver.SwitchTo().NewWindow(WindowType.Window);
            _driver.Navigate().GoToUrl("https://the-internet.herokuapp.com/typos");
            Assert.AreEqual(2, _driver.WindowHandles.Count);
        }

        [TestMethod]
        public void NewTabTest()
        {
            _driver.Navigate().GoToUrl("https://the-internet.herokuapp.com/windows");
            _driver.SwitchTo().NewWindow(WindowType.Tab);
            _driver.Navigate().GoToUrl("https://the-internet.herokuapp.com/typos");
            Assert.AreEqual(2, _driver.WindowHandles.Count);
        }
    }
}

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Code Walkthrough

Importing Libraries

First, we are pulling in our requisite classes for interacting with the operating system (e.g., using System.IO;), our testing framework (e.g., using Microsoft.VisualStudio.TestTools.UnitTesting;), driving the browser with Selenium (e.g., using OpenQA.Selenium;), and launching an instance of Firefox (e.g., using OpenQA.Selenium.Firefox;).

Setup and Teardown

After specifying the namespace and the class (e.g., public class NewWindowNewTabTest), we are setting up and tearing down the browser instance.

First we create a field variable (e.g., IWebDriver _driver;) to store our WebDriver instance for reuse throughout the class. We then create a SetUp() method with a [TestInitialize] attribute, so it runs before our test. In this method we are creating an instance of WebDriver with Firefox (e.g., _driver = new FirefoxDriver();).

After our test executes, the TearDown() method will run thanks to the [TestCleanup] attribute. This calls _driver?.Quit(); which will close the browser instance.

Open New Window

NewWindowTest shows how to open a new window, switch to it, and assert the number of window handles open. They key to this is the _driver.SwitchTo().NewWindow(WindowType.Window) line. Which opens a new window and switches to it.

Open New Tab

NewTabTest shows how to open a new tab, switch to it, and assert the number of window handles open. They key to this is the _driver.SwitchTo().NewWindow(WindowType.Tab) line. Which opens a new tab and switches to it.

Executing the Test

Before executing the test, we need to make sure the required dependencies are declared on the project file (e.g., csharp.csproj in this case).

Toggle to see the csharp.csproj file.

6-open-new-window/code/csharp/csharp.csproj

<Project Sdk="Microsoft.NET.Sdk">

    <PropertyGroup>
        <TargetFramework>net6.0</TargetFramework>
    </PropertyGroup>

    <ItemGroup>
      <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
      <PackageReference Include="MSTest.TestAdapter" Version="3.6.3" />
      <PackageReference Include="MSTest.TestFramework" Version="3.6.3" />
      <PackageReference Include="Selenium.Support" Version="4.26.1" />
      <PackageReference Include="Selenium.WebDriver" Version="4.26.1" />
    </ItemGroup>

</Project>

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Finally, we can run the test by executing dotnet test from the command-line.