Trouble running tests

[bunit-dev]

Trouble running tests

[egil]

Hi Chanan,

I am not sure why your repo is failing, but the following code worked on my computer:

1. Create a new folder, e.g. BlazorStyledTests. In that folder, add the following three files (download - BlazorStyledTests.zip):

BlazorStyledTests.csproj:

<Project Sdk="Microsoft.NET.Sdk.Razor">

  <PropertyGroup>
    <TargetFramework>netcoreapp3.0</TargetFramework>
    <RazorLangVersion>3.0</RazorLangVersion>
  </PropertyGroup>


  <ItemGroup>
    <PackageReference Include="BlazorStyled" Version="1.0.0-preview9-01" />
    <PackageReference Include="Microsoft.AspNetCore.Components" Version="3.0.0-preview9.19424.4" />
    <PackageReference Include="Microsoft.AspNetCore.Components.Web" Version="3.0.0-preview9.19424.4" />
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
    <PackageReference Include="Razor.Components.Testing.Library" Version="0.1.0-preview9-19424-4-1" />
    <PackageReference Include="xunit.assert" Version="2.4.1" />
    <PackageReference Include="xunit.core" Version="2.4.1" />
    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1">
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
      <PrivateAssets>all</PrivateAssets>
    </PackageReference>
  </ItemGroup>

</Project>

_Imports.razor:

@inherits Egil.RazorComponents.Testing.RazorComponentTest

@using Microsoft.AspNetCore.Components.Web
@using Microsoft.Extensions.DependencyInjection
@using Microsoft.JSInterop
@using Xunit
@using Egil.RazorComponents.Testing
@using BlazorStyled

SimpleStyleTests.razor:

<Fact DisplayName="red paragraph">
    <TestSetup>
        <ServerSideStyled />
        <Styled>
            p {
                color: red;
            }
        </Styled>
    </TestSetup>
    <ExpectedHtml>
        <div class="alert fade show" role="alert"></div>
    </ExpectedHtml>
</Fact>

2. From a command line inside the created folder, run dotnet build:

C:\Users\egh\Source\repos\BlazorStyledTests> dotnet build
Microsoft (R) Build Engine version 16.3.0-preview-19426-01+faf5e5d75 for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

  Restore completed in 3,37 sec for C:\Users\egh\Source\repos\BlazorStyledTests\BlazorStyledTests.csproj.
  You are using a preview version of .NET Core. See: https://aka.ms/dotnet-core-preview
  BlazorStyledTests -> C:\Users\egh\Source\repos\BlazorStyledTests\bin\Debug\netcoreapp3.0\BlazorStyledTests.dll

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:05.33

3. From a command line inside the created folder, run dotnet test:

C:\Users\egh\Source\repos\BlazorStyledTests> dotnet test
Test run for C:\Users\egh\Source\repos\BlazorStyledTests\bin\Debug\netcoreapp3.0\BlazorStyledTests.dll(.NETCoreApp,Version=v3.0)
Microsoft (R) Test Execution Command Line Tool Version 16.3.0-preview-20190820-01
Copyright (c) Microsoft Corporation.  All rights reserved.

Starting test execution, please wait...

A total of 1 test files matched the specified pattern.
[xUnit.net 00:00:00.56]     Rendered HTML should be the same as expected HTML [FAIL]
  X Rendered HTML should be the same as expected HTML [1ms]
  Error Message:
   System.AggregateException : One or more errors occurred. (Cannot provide a value for property 'StyleSheet' on type 'BlazorStyled.ServerSideStyled'. There is no registered service of type 'BlazorStyled.Stylesheets.IStyleSheet'.)
---- System.InvalidOperationException : Cannot provide a value for property 'StyleSheet' on type 'BlazorStyled.ServerSideStyled'. There is no registered service of type 'BlazorStyled.Stylesheets.IStyleSheet'.
  Stack Trace:
     at Egil.RazorComponents.Testing.Rendering.RazerComponentTestRenderer.GetResult(Task`1 task)
   at Egil.RazorComponents.Testing.Rendering.RazerComponentTestRenderer.GetTestResults(HtmlRenderer htmlRenderer, RenderFragment renderFragment)
   at Egil.RazorComponents.Testing.Rendering.RazerComponentTestRenderer.Render(RenderFragment renderFragment, IServiceCollection services)
   at Egil.RazorComponents.Testing.RazorComponentTest.Render()
   at Egil.RazorComponents.Testing.RazorComponentTest..ctor()
   at BlazorStyledTests.SimpleStyleTests..ctor()
----- Inner Stack Trace -----
   at Microsoft.AspNetCore.Components.ComponentFactory.<>c__DisplayClass5_0.<CreateInitializer>g__Initialize|2(IServiceProvider serviceProvider, IComponent component)
   at Microsoft.AspNetCore.Components.ComponentFactory.PerformPropertyInjection(IServiceProvider serviceProvider, IComponent instance)
   at Microsoft.AspNetCore.Components.ComponentFactory.InstantiateComponent(IServiceProvider serviceProvider, Type componentType)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.InstantiateComponent(Type componentType)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.InstantiateChildComponentOnFrame(RenderTreeFrame& frame, Int32 parentComponentId)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewComponentFrame(DiffContext& diffContext, Int32 frameIndex)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(DiffContext& diffContext, Int32 frameIndex)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(DiffContext& diffContext, Int32 newFrameIndex)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.ComputeDiff(Renderer renderer, RenderBatchBuilder batchBuilder, Int32 componentId, ArrayRange`1 oldTree, ArrayRange`1 newTree)
   at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderInExistingBatch(RenderQueueEntry renderQueueEntry)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
--- End of stack trace from previous location where exception was thrown ---
   at Egil.RazorComponents.Testing.Rendering.HtmlRenderer.HandleException(Exception exception)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessPendingRender()
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToRenderQueue(Int32 componentId, RenderFragment renderFragment)
   at Microsoft.AspNetCore.Components.RenderHandle.Render(RenderFragment renderFragment)
   at Microsoft.AspNetCore.Components.ComponentBase.StateHasChanged()
   at Microsoft.AspNetCore.Components.ComponentBase.CallOnParametersSetAsync()
   at Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync()
   at Egil.RazorComponents.Testing.Rendering.HtmlRenderer.HandleException(Exception exception)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToPendingTasks(Task task)
   at Microsoft.AspNetCore.Components.Rendering.ComponentState.SetDirectParameters(ParameterView parameters)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderRootComponentAsync(Int32 componentId, ParameterView initialParameters)
   at Egil.RazorComponents.Testing.Rendering.HtmlRenderer.CreateInitialRenderAsync(Type componentType, ParameterView initialParameters)
   at Egil.RazorComponents.Testing.Rendering.HtmlRenderer.RenderComponentAsync(Type componentType, ParameterView initialParameters)
   at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.<>c__11`1.<<InvokeAsync>b__11_0>d.MoveNext()

Test Run Failed.
Total tests: 2
     Passed: 1
     Failed: 1
 Total time: 1,2930 Seconds

It looks as if you need to pass in some services to using the trick shown here https://github.com/egil/razor-components-testing-library#injecting-services - then you should actually get an output validation error message.

My dotnet --info gives this output, for comparison:

C:\Users\egh\Source\repos\BlazorStyledTests> dotnet --info
.NET Core SDK (reflecting any global.json):
 Version:   3.0.100-preview9-014004
 Commit:    8e7ef240a5

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.16299
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\3.0.100-preview9-014004\

Host (useful for support):
  Version: 3.0.0-preview9-19423-09
  Commit:  2be172345a

.NET Core SDKs installed:
  2.2.401 [C:\Program Files\dotnet\sdk]
  3.0.100-preview9-014004 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.0.0-preview8.19405.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.0.0-preview9.19424.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.0.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.0.0-preview8-28405-07 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.0.0-preview9-19423-09 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 3.0.0-preview8-28405-07 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.0.0-preview9-19423-09 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

[chanan]

Working now, thanks. I think the difference might have been:

I had:

<Project Sdk="Microsoft.NET.Sdk">

And yours:

<Project Sdk="Microsoft.NET.Sdk.Razor">

[sheeley820]

Working now, thanks. I think the difference might have been:

I had:

<Project Sdk="Microsoft.NET.Sdk">

And yours:

<Project Sdk="Microsoft.NET.Sdk.Razor">

@chanan Consider yourself virtually hugged. This was exactly what my issue ended up being. Thanks for solving it first.