<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/61103>61103</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            llvm/Testing/Support/Error.h
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          tschuett
      </td>
    </tr>
</table>

<pre>
    https://llvm.org/doxygen/classllvm_1_1Expected.html

LLVM has testing facilities for `llvm::Expected`, the `EXPECT_THAT_EXPECTED` macro.

In my local build, I could not find an install target:
```console
ninja -t targets | grep Testing | grep install
```
Is the testing support only for internal users?
</pre>
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