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SetParametersAndRender will breaks with .NET 8

See original GitHub issue

Describe the bug The extension function SetParametersAndRender throws a NullPointerException since the ComponentState.SetDirectParameters methods vilisbility is changed to internal in .NET 8.0 Preview 4.

The exception is raised here: https://github.com/bUnit-dev/bUnit/blob/e654d6d21b269e1e7a15a812968532a17795caff/src/bunit.core/Rendering/TestRenderer.cs#L211-L213

Example: Testing this component:

<div>
    @Test
</div>

@code {
    [Parameter]
    public string? Test { get; set; }
}

With this test:

        // Arrange
        var test = "Hello";
        var nextTest = "World";

        // Act
        var cut = RenderComponent<ExampleComponent>(p => p.Add(x => x.Test, test));
        cut.SetParametersAndRender(p => p.Add(x => x.Test, nextTest));

        // Assert
        cut.MarkupMatches($"<div>{nextTest}</div>");

Results in this output:

Message: 
System.NullReferenceException : Object reference not set to an instance of an object.

  Stack Trace: 
<>c__DisplayClass32_0.<SetDirectParameters>b__0() line 213
<>c.<InvokeAsync>b__8_0(Object state)
--- End of stack trace from previous location ---
TestRenderer.AssertNoUnhandledExceptions() line 582
TestRenderer.SetDirectParameters(IRenderedFragmentBase renderedComponent, ParameterView parameters) line 232
RenderedComponentRenderExtensions.SetParametersAndRender[TComponent](IRenderedComponentBase`1 renderedComponent, ParameterView parameters) line 33
RenderedComponentRenderExtensions.SetParametersAndRender[TComponent](IRenderedComponentBase`1 renderedComponent, Action`1 parameterBuilder) line 68
Tests.UpdatesCorrectly() line 39
RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)

Version info:

bUnit version: 1.22.19
.NET Runtime and Blazor version: 8.0.0-preview.6.23329.11

Additional context:

Related changes in dotnet/aspnetcore:

Commit: #ff2241b
Pull Request: 47555

Issue Analytics

State:
Created 2 months ago
Comments:7 (1 by maintainers)

Top GitHub Comments

2reactions

linkdotnetcommented, Jul 30, 2023

@egil: I have a PR ready when I get back from the holidays (tomorrow evening). I have a new laptop and my ssh settings and stuff are not ported - therefore I want to set this up tomorrow for signed commits and stuff

1reaction

a2ercommented, Aug 1, 2023

SetParametersAndRender is working as expected. I will continue playing around with .NET 8 Blazor (but WASM only) you may hear from me.

Thanks for the quick fix guys!

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