blocks|key|21950|text|您可能是this+problem的受害者，该问题(理论上)已在15.6.3中解决。根据this+answer的说法，尝试删除您的%25temp%25\VisualStudioTestExplorerExtensions文件夹。这为其他一些用户解决了这个问题。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|21951|entityMap|0|LINK|mutability|MUTABLE|url|https://developercommunity.visualstudio.com/content/problem/209020/last-update-studion-2017-cannot-run-nunit-tests.html|1|https://developercommunity.visualstudio.com/comments/213947/view.html^0|1S|15|4|C|0|17|B|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]|$9|V|A|W|1|X]]|E|$]]|$1|F|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]|N|$5|I|J|K|E|$L|O]]]]

You may have been a casualty of <a href="https://developercommunity.visualstudio.com/content/problem/209020/last-update-studion-2017-cannot-run-nunit-tests.html" rel="nofollow noreferrer">this problem</a> that was (theoretically) resolved in 15.6.3. According to <a href="https://developercommunity.visualstudio.com/comments/213947/view.html" rel="nofollow noreferrer">this answer</a>, try deleting your <code>%temp%\VisualStudioTestExplorerExtensions</code> folder. That has resolved the issue for some other users.

blocks|key|22075|text|您是否可以在解决方案上右键单击并从那里运行单元测试，而不是使用Test+Explorer？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|22076|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Rather than using the Test Explorer, can you right click on the solution and Run Unit Tests from there?

blocks|key|21990|text|你能检查下面的步骤，看看它是否工作吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|21991|21992|在Visual+Studio菜单中，如果选择了X86，则转到Test+>+Test+Settings+>+Default+Processor+Architecture并记下，或者转到项目的Build窗口中的Properties部分，测试就是在这里编写的。确保将Platform+target下拉菜单选择为Any+CPU或至少与上述step+1.|unordered-list-item|offset|length|style|CODE|21993|
中的体系结构相匹配|21994|现在，如果您构建解决方案并尝试运行这些测试，您应该会看到它们现在正在运行。|21995|entityMap^0|0|0|N|3|U|1H|2M|5|2V|A|3M|F|48|7|4L|6|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|R|8|@$F|S|G|T|H|I]|$F|U|G|V|H|I]|$F|W|G|X|H|I]|$F|Y|G|Z|H|I]|$F|10|G|11|H|I]|$F|12|G|13|H|I]|$F|14|G|15|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|16|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|17|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|O|$]]

Can you check the following steps and see if it works?

<ol>
<li>In the Visual Studio menu, go to <code>Test &gt; Test Settings &gt; Default Processor Architecture</code> and make a note if <code>X86</code> is selected or <code>X64</code></li>
<li>Now go to the <code>Build</code> section in the <code>Properties</code> window of the project where the tests are written. Make sure the <code>Platform target</code> drop-down is selected to either <code>Any CPU</code> or at least it matches the architecture from the above <code>step 1</code>.</li>
</ol>

Now if you build the solution and try running those tests, you should see that they are now running.

blocks|key|22079|text|我发现我的构建事件是错误的。无效的复制命令破坏了我所有的测试和半天：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|22080|Copy+C:\repo\Architecture\*.json+$(ProjectPath)/Y
Copy+C:\repo\Architecture\*.json+$(TargetPath)+/Y|code-block|syntax|javascript|22081|而不是|22082|Copy+C:\repo\Architecture\*.json+$(ProjectDir)/Y
Copy+C:\repo\Architecture\*.json+$(TargetDir)+/Y|22083|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I found that my Build Events were wrong. Invalid copy command blew all my tests and half a day:

<pre><code>Copy C:\repo\Architecture\*.json $(ProjectPath)/Y
Copy C:\repo\Architecture\*.json $(TargetPath) /Y
</code></pre>

instead of 

<pre><code>Copy C:\repo\Architecture\*.json $(ProjectDir)/Y
Copy C:\repo\Architecture\*.json $(TargetDir) /Y
</code></pre>

blocks|key|2475920|text|我遇到了和Amete+Blessed相同的问题，并且注释掉了其他的Test方法，使Test+Explorer工作并运行我的测试|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2475921|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had the same problem as Amete Blessed and commenting out other Test methods made Test Explorer work and run my test

blocks|key|2686206|text|确保已从此处安装NUnit3测试适配器|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2686207|https://marketplace.visualstudio.com/items?itemName=NUnitDevelopers.NUnit3TestAdapter|offset|length|2686208|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|2D|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

Make sure you have installed the NUnit3 Test Adapter from here

<a href="https://marketplace.visualstudio.com/items?itemName=NUnitDevelopers.NUnit3TestAdapter" rel="noreferrer">https://marketplace.visualstudio.com/items?itemName=NUnitDevelopers.NUnit3TestAdapter</a>

blocks|key|2476037|text|我在使用Xamarin.Forms时也遇到了类似的问题。解决方案是从NuGet安装NUnit.XForms并添加|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2476038|<PackageReference+Include="Microsoft.NET.Test.Sdk"+Version="15.3.0"+/>|code-block|syntax|javascript|2476039|到测试所在项目的csproj文件。|2476040|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I had similar problem when using Xamarin.Forms.
The solution was to install NUnit.XForms from NuGet and add

<pre><code>&lt;PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.3.0" /&gt;
</code></pre>

to csproj file of the project where the tests are.

blocks|key|2476050|text|测试输出窗口中的消息("NUnit无法加载程序集“、”没有可用的测试...“等)可以隐藏导致runner无法加载测试程序集的潜在问题。这包括隐藏加载测试程序集或测试项的依赖项的失败。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2476051|如果测试资源管理器窗口中显示了一个测试程序集，但测试拒绝运行，则有必要暂时启用融合日志记录，以查看在尝试运行测试时是否发生任何程序集绑定错误。|2476052|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

The messages in the Test Output window ("NUnit failed to load [assembly]", "No test is available...", etc.) can hide the underlying issue that's causing the runner to not load the test assembly. This includes hiding failures to load dependencies of the test assembly or the item under test.

If there's a test assembly that's showing up in the Test Explorer window, but the tests refuse to run, it's worth temporarily enabling fusion logging to see if any assembly binding errors occur when trying to run the tests.

blocks|key|2476065|text|在通过nuget安装NUnit之后，测试已经出现在测试资源管理器中，但是当我运行它们时，我得到的结果是“没有可用的测试”。安装NUnit测试适配器已修复此问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2476066|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

After installing NUnit through nuget tests have appeared into Test Explorer 
but when I ran them I got "No test is available". 
Installing NUnit Test Adapter fixed the issue.

blocks|key|22036|text|也有同样的问题。在我的例子中，我发现如果您的测试项目包含对MSTest的引用，test+Explorer将不会使用NUnit测试适配器。通常是Microsoft.VisualStudio.TestPlatform.TestFramework.dll，但也要检查.csproj文件中的"MSTest“和packages.config文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|22037|我首先为Visual+Studio测试启用了诊断日志记录，从而发现了这一点。这可以在"Tools“”->“"Options”“->+"Tests”->“"Logging+Level”下找到。|22038|在我的日志中，我发现了这个条目：|22039|22/11/2018+10:36:42诊断项目C:\Git\myProject\src\myProject.Tests\myProject.Tests.csproj参考测试适配器:+MSTest.TestAdapter，版本1.1.18|22040|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Had the same problem. In my case I found that the NUnit test adapter will not be used by Test Explorer if your test project contains a reference to MSTest. Typically the Microsoft.VisualStudio.TestPlatform.TestFramework.dll but also check your .csproj file for "MSTest" and your packages.config file.

I discovered this by first enabling diagnostic logging for Visual Studio tests. This is found under "Tools" -> "Options" -> "Tests" -> "Logging Level".

In my log I found this entry:

[22/11/2018 10:36:42 Diagnostic] Project C:\Git\myProject\src\myProject.Tests\myProject.Tests.csproj references test adapter: MSTest.TestAdapter, version 1.1.18

blocks|key|23566|text|对我来说起作用的是删除位于%25localappdata%25\Microsoft\VisualStudio\<version>的ComponentModelCache文件夹|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|23567|entityMap^0|D|1B|1P|J|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

What worked for me was to delete the <code>ComponentModelCache</code> folder located at <code>%localappdata%\Microsoft\VisualStudio\&lt;version&gt;</code>

blocks|key|22226|text|我也遇到过同样的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|22227|解决此问题的步骤-|offset|length|style|BOLD|22228|+1.+Install/Reinstall+NUnit3TestAdapter+package
+2.+Delete+Debug+folder+from+the+Bin
+3.+Clean+-->+Build+the+project|code-block|syntax|javascript|22229|注意-还要确保所有软件包都已正确安装。|22230|现在尝试执行测试。|22231|entityMap^0|0|6|3|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@$D|U|E|V|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|W|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

I have also encountered the same issue. 

Steps to resolve this issue - 

<pre><code> 1. Install/Reinstall NUnit3TestAdapter package
 2. Delete Debug folder from the Bin
 3. Clean --&gt; Build the project
</code></pre>

Note - Also ensure all the packages are installed properly.

Now try to execute the tests.

blocks|key|2686436|text|我也遇到过同样的问题，但是在通过NuGet将"NUnit+3+TestAdapter+version+3.16.1“安装到我的项目中之后，这个问题就被修复了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2686437|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had the same issue, but it was fixed after installing "NUnit 3 TestAdapter version 3.16.1" via NuGet to my project.

I am using the latest VS2017 version 15.6.4, NUnit3TestAdapter 3.10.0 and Nunit version 3.9.0.0. 

When I try to run a unit test in Test Explorer the test are grayed out, when I right click and and run selected tests I see the following error: No test is available
Here is how my test class looks

<pre><code> [TestFixture]
 public partial class ListViewBOTest
 {
 [Test]
 public void TestSearch_DateTime()
 {
 Assert.AreEqual(1,0);
 }

 }
</code></pre>

<a href="https://i.stack.imgur.com/MVaQb.png" rel="noreferrer"><img src="https://i.stack.imgur.com/MVaQb.png" alt="Here is a screenshot of my tests"></a>

Text from output:

<pre><code>[3/26/2018 10:53:55 AM Informational] ------ Run test started ------
[3/26/2018 10:53:55 AM Informational] NUnit Adapter 3.10.0.21: Test execution started
[3/26/2018 10:53:55 AM Informational] Running all tests in C:\Projects\MVPPlant\DEV\CMMSdg.Plant\CMMSdg.Plant\Sln.2010\CMMSdg.Plant.BusinessObjects.Test\bin\Debug\CMMSdg.Plant.BusinessObjects.Test.dll
[3/26/2018 10:53:56 AM Informational] NUnit failed to load C:\Projects\MVPPlant\DEV\CMMSdg.Plant\CMMSdg.Plant\Sln.2010\CMMSdg.Plant.BusinessObjects.Test\bin\Debug\CMMSdg.Plant.BusinessObjects.Test.dll
[3/26/2018 10:53:56 AM Informational] NUnit Adapter 3.10.0.21: Test execution complete
[3/26/2018 10:53:56 AM Warning] No test is available in C:\Projects\MVPPlant\DEV\CMMSdg.Plant\CMMSdg.Plant\Sln.2010\CMMSdg.Plant.BusinessObjects.Test\bin\Debug\CMMSdg.Plant.BusinessObjects.Test.dll. Make sure that test discoverer &amp; executors are registered and platform &amp; framework version settings are appropriate and try again.
[3/26/2018 10:53:56 AM Informational] ========== Run test finished: 0 run (0:00:01.0435303) ==========
</code></pre>

VS2017 and NUnit 3.9 No test is available

Visual Studio

单元测试

Xamarin

我使用的是最新的VS2017版本15.6.4、NUnit3TestAdapter 3.10.0和Nunit版本3.9.0.0。当我尝试在测试资源管理器中运行单元测试时，测试将呈灰色显示，当我右键单击并运行选定的测试时，我看到以下错误：No test is available Here是我的测试类的外观    [Test...

问VS2017和NUnit 3.9没有可用的测试
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