Fix InvalidOperationException in Selectors when running parallel tests (#3208)

Copilot · web-flow · commit 888c0538b19b · 2025-07-30T14:58:23.000+02:00
diff --git a/src/Playwright/Core/Selectors.cs b/src/Playwright/Core/Selectors.cs
@@ -53,7 +53,7 @@ public async Task RegisterAsync(string name, SelectorsRegisterOptions? options =
         {
             engine["contentScript"] = options.ContentScript;
         }
-        foreach (var context in _contextsForSelectors)
+        foreach (var context in _contextsForSelectors.ToArray())
         {
             await context.SendMessageToServerAsync("registerSelectorEngine", new Dictionary<string, object?>
             {
@@ -67,7 +67,7 @@ public void SetTestIdAttribute(string attributeName)
     {
         Locator.SetTestIdAttribute(attributeName);
         _testIdAttributeName = attributeName;
-        foreach (var context in _contextsForSelectors)
+        foreach (var context in _contextsForSelectors.ToArray())
         {
             context.SendMessageToServerAsync(
             "setTestIdAttributeName",

Original file line number	Diff line number	Diff line change
`@@ -53,7 +53,7 @@ public async Task RegisterAsync(string name, SelectorsRegisterOptions? options =`
`53`	`53`	`{`
`54`	`54`	`engine["contentScript"] = options.ContentScript;`
`55`	`55`	`}`
`56`		`- foreach (var context in _contextsForSelectors)`
	`56`	`+ foreach (var context in _contextsForSelectors.ToArray())`
`57`	`57`	`{`
`58`	`58`	`await context.SendMessageToServerAsync("registerSelectorEngine", new Dictionary<string, object?>`
`59`	`59`	`{`
`@@ -67,7 +67,7 @@ public void SetTestIdAttribute(string attributeName)`
`67`	`67`	`{`
`68`	`68`	`Locator.SetTestIdAttribute(attributeName);`
`69`	`69`	`_testIdAttributeName = attributeName;`
`70`		`- foreach (var context in _contextsForSelectors)`
	`70`	`+ foreach (var context in _contextsForSelectors.ToArray())`
`71`	`71`	`{`
`72`	`72`	`context.SendMessageToServerAsync(`
`73`	`73`	`"setTestIdAttributeName",`