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Getting Started Wizard

Home > Linux > Other > Prefer CLI > Xunit > Azure DevOps

Add NuGet packages

Add the following packages to the test project:

dotnet add package Microsoft.NET.Test.Sdk
dotnet add package Verify.Xunit
dotnet add package Xunit
dotnet add package xunit.runner.visualstudio

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().

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

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

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}.{txt,xml,json}]
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

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

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

dotnet add package Verify.DiffPlex

Enable

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

Verify.Terminal

Verify.Terminal is a dotnet tool for managing snapshots from the command line.

This is optional.

Install the tool

dotnet tool install -g verify.tool

Sample Test

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

snippet source | anchor

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 Linux:

Getting .received in output on Azure DevOps

Directly after the test runner step add a build step to set a flag if the testrunner failed. This is done by using a failed condition. This flag will be evaluated in the CopyFiles and PublishBuildArtifacts steps below.

- task: CmdLine@2
  displayName: 'Set flag to publish Verify *.received.* files when test step fails'
  condition: failed()
  inputs:
    script: 'echo ##vso[task.setvariable variable=publishverify]Yes'

Since the PublishBuildArtifacts step in DevOps does not allow a wildcard it is necessary to need stage the 'received' files before publishing:

- task: CopyFiles@2
  condition: eq(variables['publishverify'], 'Yes')
  displayName: 'Copy Verify *.received.* files to Artifact Staging'
  inputs:
    contents: '**\*.received.*' 
    targetFolder: '$(Build.ArtifactStagingDirectory)\Verify'
    cleanTargetFolder: true
    overWrite: true

Publish the staged files as a build artifact:

- task: PublishBuildArtifacts@1
  displayName: 'Publish Verify *.received.* files as Artifacts'
  name: 'verifypublish'
  condition: eq(variables['publishverify'], 'Yes')
  inputs:
    PathtoPublish: '$(Build.ArtifactStagingDirectory)\Verify'
    ArtifactName: 'Verify'
    publishLocation: 'Container'