Automatically install required browser files for Playwright #3190
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xjc90s
approved these changes
Sep 7, 2025
Ensuring that playwright is properly installed can be done by running the following code: ```csharp var playwright = new Microsoft.Playwright.Program(); var exitCode = playwright.Run(["install", "--with-deps"]); ``` This is fine when the installation succeeds and the exit code is 0. But when running under xUnit.net (which [does **not** capture the console output](https://xunit.net/docs/capturing-output)) and the installation fails with exit code 1, then it becomes impossibly hard to diagnose the root cause of the failure. For example, a failure can be triggered by deleting the installed browers in the `ms-playwright` cache directory and setting the `https_proxy` environment variable to an invalid proxy: `http://127.0.0.1:33333`. Under these conditions, running with the new `throwOnError` parameter becomes diagnosable. ```csharp var playwright = new Microsoft.Playwright.Program(); var exitCode = playwright.Run(["install", "--with-deps", "firefox"], throwOnError: true); ``` This throws a `PlaywrightException` with the exact command executed and its output, making it clear what the problem is. > Failed to run ~/playwright-dotnet/src/playwright-xunit/bin/Debug/net8.0/.playwright/node/darwin-x64/node "~/playwright-dotnet/src/playwright-xunit/bin/Debug/net8.0/.playwright/package/cli.js" "install" "--with-deps" "firefox" > Downloading Firefox 132.0 (playwright build v1466) from https://playwright.azureedge.net/builds/firefox/1466/firefox-mac.zip > Error: connect ECONNREFUSED 127.0.0.1:33333 > at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1610:16) { > errno: -61, > code: 'ECONNREFUSED', > syscall: 'connect', > address: '127.0.0.1', > port: 33333 > } > Downloading Firefox 132.0 (playwright build v1466) from https://playwright-akamai.azureedge.net/builds/firefox/1466/firefox-mac.zip > Error: connect ECONNREFUSED 127.0.0.1:33333 > at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1610:16) { > errno: -61, > code: 'ECONNREFUSED', > syscall: 'connect', > address: '127.0.0.1', > port: 33333 > } > Downloading Firefox 132.0 (playwright build v1466) from https://playwright-verizon.azureedge.net/builds/firefox/1466/firefox-mac.zip > Error: connect ECONNREFUSED 127.0.0.1:33333 > at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1610:16) { > errno: -61, > code: 'ECONNREFUSED', > syscall: 'connect', > address: '127.0.0.1', > port: 33333 > } > Failed to install browsers > Error: Failed to download Firefox 132.0 (playwright build v1466), caused by > Error: Download failure, code=1
This will prevent this exception: > Microsoft.Playwright.PlaywrightException > Executable doesn't exist at ~/Library/Caches/ms-playwright/chromium-1148/chrome-mac/Chromium.app/Contents/MacOS/Chromium > ╔════════════════════════════════════════════════════════════╗ > ║ Looks like Playwright was just installed or updated. ║ > ║ Please run the following command to download new browsers: ║ > ║ ║ > ║ pwsh bin/Debug/netX/playwright.ps1 install ║ > ║ ║ > ║ <3 Playwright Team ║ > ╚════════════════════════════════════════════════════════════╝ > at Microsoft.Playwright.Transport.Connection.InnerSendMessageToServerAsync[T](ChannelOwner object, String method, Dictionary`2 dictionary, Boolean keepNulls) in /_/src/Playwright/Transport/Connection.cs:line 206 > at Microsoft.Playwright.Transport.Connection.WrapApiCallAsync[T](Func`1 action, Boolean isInternal) in /_/src/Playwright/Transport/Connection.cs:line 535 > at Microsoft.Playwright.Core.BrowserType.LaunchAsync(BrowserTypeLaunchOptions options) in /_/src/Playwright/Core/BrowserType.cs:line 56 > at Microsoft.Playwright.Xunit.BrowserService.CreateBrowser(IBrowserType browserType) in /_/src/Playwright.Xunit/BrowserService.cs:line 56 > at Microsoft.Playwright.Xunit.BrowserService.<>c__DisplayClass5_0.<<Register>b__0>d.MoveNext() in /_/src/Playwright.Xunit/BrowserService.cs:line 46 > --- End of stack trace from previous location --- > at Microsoft.Playwright.Xunit.WorkerAwareTest.RegisterService[T](String name, Func`1 factory) in /_/src/Playwright.Xunit/WorkerAwareTest.cs:line 54 > at Microsoft.Playwright.Xunit.BrowserTest.InitializeAsync() in /_/src/Playwright.Xunit/BrowserTest.cs:line 45 > at Microsoft.Playwright.Xunit.ContextTest.InitializeAsync() in /_/src/Playwright.Xunit/ContextTest.cs:line 35 > at Microsoft.Playwright.Xunit.PageTest.InitializeAsync() in /_/src/Playwright.Xunit/PageTest.cs:line 35 This helps with microsoft#2286.
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xjc90s
approved these changes
Sep 8, 2025
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This will prevent this exception when
Playwright.MSTest,Playwright.NUnitorPlaywright.Xunitis used:This helps with #2286.
Aslo note that this pull request is stacked on top of #3140.