跟踪查看器

介绍

Playwright Trace Viewer 是一个 GUI 工具，可让您探索录制的 Playwright 跟踪，这意味着您可以向前或向后查看测试的每个操作，并直观地看到每个操作期间发生的情况。

您将学到

• 如何录制跟踪
• 如何打开跟踪查看器

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，并将其放置在 bin/Debug/net8.0/playwright-traces/ 目录中。

打开跟踪

您可以使用 Playwright CLI 或在浏览器中通过 trace.playwright.dev 打开保存的跟踪。请确保添加您的跟踪 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之前和之后的页面状态。您还可以在测试的每个步骤中检查日志、源代码和网络。跟踪查看器会创建一个 DOM 快照，因此您可以与其完全交互、打开开发工具等。

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

请查阅我们关于跟踪查看器的详细指南，以了解更多关于跟踪查看器的信息以及如何设置您的测试以仅在测试失败时录制跟踪。

下一步

• 使用 GitHub Actions 在 CI 上运行测试
• 了解更多关于 MSTest、NUnit 和 xUnit 基类的信息