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System.NullReferenceException at Microsoft.Playwright.NUnit.BrowserService

See original GitHub issue

I am trying to follow the “First test” instructions here but when I run dotnet test – NUnit.NumberOfTestWorkers=5 I get the following error:

Starting test execution, please wait...
A total of 1 test files matched the specified pattern.
  Failed ShouldAdd [4 s]
  Error Message:
   System.NullReferenceException : Object reference not set to an instance of an object.
  Stack Trace:
     at Microsoft.Playwright.NUnit.BrowserService.<>c__DisplayClass4_0.<<Register>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.Playwright.NUnit.WorkerAwareTest.RegisterService[T](String name, Func`1 factory)
   at Microsoft.Playwright.NUnit.BrowserService.Register(WorkerAwareTest test, IBrowserType browserType)
   at Microsoft.Playwright.NUnit.BrowserTest.BrowserSetup()
   at NUnit.Framework.Internal.TaskAwaitAdapter.GenericAdapter`1.GetResult()
   at NUnit.Framework.Internal.AsyncToSyncAdapter.Await(Func`1 invoke)
   at NUnit.Framework.Internal.Commands.SetUpTearDownItem.RunSetUpOrTearDownMethod(TestExecutionContext context, MethodInfo method)
   at NUnit.Framework.Internal.Commands.SetUpTearDownItem.RunSetUp(TestExecutionContext context)
   at NUnit.Framework.Internal.Commands.SetUpTearDownCommand.<>c__DisplayClass0_0.<.ctor>b__0(TestExecutionContext context)
   at NUnit.Framework.Internal.Commands.BeforeAndAfterTestCommand.<>c__DisplayClass1_0.<Execute>b__0()
   at NUnit.Framework.Internal.Commands.BeforeAndAfterTestCommand.RunTestMethodInThreadAbortSafeZone(TestExecutionContext context, Action action)
  Failed ShouldMultiply [< 1 ms]
  Error Message:
   System.NullReferenceException : Object reference not set to an instance of an object.
  Stack Trace:
     at Microsoft.Playwright.NUnit.BrowserService.<>c__DisplayClass4_0.<<Register>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.Playwright.NUnit.WorkerAwareTest.RegisterService[T](String name, Func`1 factory)
   at Microsoft.Playwright.NUnit.BrowserService.Register(WorkerAwareTest test, IBrowserType browserType)
   at Microsoft.Playwright.NUnit.BrowserTest.BrowserSetup()
   at NUnit.Framework.Internal.TaskAwaitAdapter.GenericAdapter`1.GetResult()
   at NUnit.Framework.Internal.AsyncToSyncAdapter.Await(Func`1 invoke)
   at NUnit.Framework.Internal.Commands.SetUpTearDownItem.RunSetUpOrTearDownMethod(TestExecutionContext context, MethodInfo method)
   at NUnit.Framework.Internal.Commands.SetUpTearDownItem.RunSetUp(TestExecutionContext context)
   at NUnit.Framework.Internal.Commands.SetUpTearDownCommand.<>c__DisplayClass0_0.<.ctor>b__0(TestExecutionContext context)
   at NUnit.Framework.Internal.Commands.BeforeAndAfterTestCommand.<>c__DisplayClass1_0.<Execute>b__0()
   at NUnit.Framework.Internal.Commands.BeforeAndAfterTestCommand.RunTestMethodInThreadAbortSafeZone(TestExecutionContext context, Action action)

Failed!  - Failed:     2, Passed:     0, Skipped:     0, Total:     2, Duration: 4 s - Rfsmart.PointOfCare.PlaywrightTests.dll (net5.0)

Issue Analytics

State:
Created 2 years ago
Comments:6 (5 by maintainers)

Top GitHub Comments

1reaction

beamsjrcommented, Jun 21, 2021

That indeed was my issue. Thank you.

0reactions

avodovnikcommented, Jun 21, 2021

@SimonCropp see #1573 - we now fail the test, if this happens. I considered throwing an exception in the base implementation, but I didn’t see the value and it just introduces a potential (unwarranted) behavioural change.

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