Trace viewer

简介

Playwright Trace Viewer 是一个 GUI 工具，可让您浏览已录制的 Playwright 测试跟踪，这意味着您可以来回浏览测试的每个操作，并直观地查看每个操作期间发生的情况。

您将学习

• 如何录制跟踪
• 如何打开 Trace Viewer

录制跟踪

可以使用 BrowserContext.Tracing API 录制跟踪，如下所示

MSTest

namespace PlaywrightTests;

[Parallelizable(ParallelScope.Self)]
[TestFixture]
public class Tests : PageTest
{
    [SetUp]
    public async Task Setup()
    {
        await Context.Tracing.StartAsync(new()
        {
            Title = $"{TestContext.CurrentContext.Test.ClassName}.{TestContext.CurrentContext.Test.Name}",
            Screenshots = true,
            Snapshots = true,
            Sources = true
        });
    }

    [TearDown]
    public async Task TearDown()
    {
        await Context.Tracing.StopAsync(new()
        {
            Path = Path.Combine(
                TestContext.CurrentContext.WorkDirectory,
                "playwright-traces",
                $"{TestContext.CurrentContext.Test.ClassName}.{TestContext.CurrentContext.Test.Name}.zip"
            )
        });
    }

    [Test]
    public async Task GetStartedLink()
    {
        // ..
    }
}

NUnit

using System.Text.RegularExpressions;
using Microsoft.Playwright;
using Microsoft.Playwright.MSTest;

namespace PlaywrightTests;

[TestClass]
public class ExampleTest : PageTest
{
    [TestInitialize]
    public async Task TestInitialize()
    {
         await Context.Tracing.StartAsync(new()
        {
            Title = $"{TestContext.FullyQualifiedTestClassName}.{TestContext.TestName}",
            Screenshots = true,
            Snapshots = true,
            Sources = true
        });
    }

    [TestCleanup]
    public async Task TestCleanup()
    {
        await Context.Tracing.StopAsync(new()
        {
            Path = Path.Combine(
                Environment.CurrentDirectory,
                "playwright-traces",
                $"{TestContext.FullyQualifiedTestClassName}.{TestContext.TestName}.zip"
            )
        });
    }

    [TestMethod]
    public async Task GetStartedLink()
    {
        // ...
    }
}

xUnit

using System.Reflection;
using Microsoft.Playwright;
using Microsoft.Playwright.Xunit;
using Xunit.Sdk;

namespace PlaywrightTests;

[WithTestName]
public class UnitTest1 : PageTest
{
    public override async Task InitializeAsync()
    {
        await base.InitializeAsync().ConfigureAwait(false);
        await Context.Tracing.StartAsync(new()
        {
            Title = $"{WithTestNameAttribute.CurrentClassName}.{WithTestNameAttribute.CurrentTestName}",
            Screenshots = true,
            Snapshots = true,
            Sources = true
        });
    }

    public override async Task DisposeAsync()
    {
        await Context.Tracing.StopAsync(new()
        {
            Path = Path.Combine(
                Environment.CurrentDirectory,
                "playwright-traces",
               $"{WithTestNameAttribute.CurrentClassName}.{WithTestNameAttribute.CurrentTestName}.zip"
            )
        });
        await base.DisposeAsync().ConfigureAwait(false);
    }

    [Fact]
    public async Task GetStartedLink()
    {
        // ...
        await Page.GotoAsync("https://playwright.net.cn/dotnet/docs/intro");
    }
}

public class WithTestNameAttribute : BeforeAfterTestAttribute
{
    public static string CurrentTestName = string.Empty;
    public static string CurrentClassName = string.Empty;

    public override void Before(MethodInfo methodInfo)
    {
        CurrentTestName = methodInfo.Name;
        CurrentClassName = methodInfo.DeclaringType!.Name;
    }

    public override void After(MethodInfo methodInfo)
    {
    }
}

这将为每个测试录制一个 zip 文件，例如 PlaywrightTests.ExampleTest.GetStartedLink.zip 并将其放入 bin/Debug/net8.0/playwright-traces/ 目录中。

打开跟踪

您可以使用 Playwright CLI 或在浏览器上通过 trace.playwright.dev 打开保存的跟踪。请务必添加您的跟踪 zip 文件所在的完整路径。打开后，您可以单击每个操作或使用时间线查看每个操作前后页面的状态。您还可以在测试的每个步骤中检查日志、源代码和网络。Trace Viewer 创建 DOM 快照，因此您可以完全与之交互，打开 devtools 等。

pwsh bin/Debug/net8.0/playwright.ps1 show-trace bin/Debug/net8.0/playwright-traces/PlaywrightTests.ExampleTest.GetStartedLink.zip

请查看我们关于 Trace Viewer 的详细指南，以了解有关 Trace Viewer 的更多信息，以及如何设置测试以仅在测试失败时录制跟踪。

下一步

• 在 CI 上使用 GitHub Actions 运行测试
• 了解有关 MSTest、NUnit 和 xUnit 基类的更多信息