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Getting Started Wizard

Home > Windows > Visual Studio > Prefer GUI > NUnit > GitHub Actions

Add NuGet packages

Add the following packages to the test project:

<PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
<PackageReference Include="NUnit" Version="4.6.1" />
<PackageReference Include="Verify.NUnit" Version="31.20.0" />
<PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />

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Implicit Usings

All examples use Implicit Usings. Ensure <ImplicitUsings> is set to enable to ensure examples compile correctly.

<ImplicitUsings>enable</ImplicitUsings>

If ImplicitUsings are not enabled, substitute usages of Verify() with Verifier.Verify().

Conventions

Source Control Includes/Excludes

  • All *.received.* files should be excluded from source control.

eg. add the following to .gitignore

*.received.*

If using UseSplitModeForUniqueDirectory also include:

*.received/

All *.verified.* files should be committed to source control.

Text file settings

Text variants of verified and received have the following characteristics:

This manifests in several ways:

Source control settings

All text extensions of *.verified.* should have:

  • eol set to lf
  • working-tree-encoding set to UTF-8

Note: working-tree-encoding=UTF-8 is correct even though Verify writes files with a BOM. Git does not strip or add the BOM — it passes through transparently. The UTF-8-BOM encoding would explicitly add a BOM on checkout and strip it on commit (so the internal blob differs from the working tree), but that is not the desired behavior since Verify writes the BOM itself and it should be preserved in the blob.

All Binary files should also be marked to avoid merging and line ending issues with binary files.

eg add the following to .gitattributes

*.verified.txt text eol=lf working-tree-encoding=UTF-8
*.verified.xml text eol=lf working-tree-encoding=UTF-8
*.verified.json text eol=lf working-tree-encoding=UTF-8
*.verified.bin binary

Line ending autocrlf

On Windows, if core.autocrlf is set to true, files may show as modified with no actual content changes. To fix this:

git config --global core.autocrlf input

EditorConfig settings

If modifying text verified/received files in an editor, it is desirable for the editor to respect the above conventions. For EditorConfig enabled the following can be used:

# Verify settings
[*.{received,verified}.{json,txt,xml}]
charset = utf-8-bom
end_of_line = lf
indent_size = unset
indent_style = unset
insert_final_newline = false
tab_width = unset
trim_trailing_whitespace = false

[*.{received,verified}.{json,xml,html,htm,yaml,svg}]
indent_size = 2
indent_style = space

Note that the above are suggested for subset of text extension. Add others as required based on the text file types being verified.

Conventions check

Conventions can be checked by calling VerifyChecks.Run() in a test

[TestFixture]
public class VerifyChecksTests
{
    [Test]
    public Task Run() =>
        VerifyChecks.Run();
}

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DiffEngineTray

Install DiffEngineTray

DiffEngineTray sits in the Windows tray. It monitors pending changes in snapshots, and provides a mechanism for accepting or rejecting those changes.

dotnet tool install -g DiffEngineTray

This is optional, but recommended. Also consider enabling Run at startup.

DiffPlex

The text comparison behavior of Verify is pluggable. The default behaviour, on failure, is to output both the received and the verified contents as part of the exception. This can be noisy when verifying large strings.

Verify.DiffPlex changes the text compare result to highlighting text differences inline.

This is optional, but recommended.

Add the NuGet

<PackageReference Include="Verify.DiffPlex" Version="*" />

Enable

[ModuleInitializer]
public static void Initialize() =>
    VerifyDiffPlex.Initialize();

Sample Test

[TestFixture]
public class Sample
{
    [Test]
    public Task Test()
    {
        var person = ClassBeingTested.FindPerson();
        return Verify(person);
    }
}

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Diff Tool

Verify supports many Diff Tools for comparing received to verified. While IDEs are supported, due to their MDI nature, using a different Diff Tool is recommended.

Tools supported by Windows:

Getting .received in output on GitHub Actions

Use a if: failure() condition to upload any *.received.* files if the build fails.

- name: Upload Test Results
  if: failure()
  uses: actions/upload-artifact@v4
  with:
    name: verify-test-results
    path: |
      **/*.received.*