Agent skill

dotnet-verify

This skill should be used when working with Verify snapshot tests in .NET projects. Use when updating verified snapshots after intentional code changes, accepting new snapshots, discovering verify tests, or troubleshooting snapshot mismatches. Trigger phrases include "verify tests", "update snapshots", "accept snapshots", "verified files", ".verified.txt".

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Install this agent skill to your Project

npx add-skill https://github.com/NikiforovAll/claude-code-rules/tree/main/plugins/handbook-dotnet/skills/dotnet-verify

SKILL.md

.NET Verify Snapshot Testing

Manage Verify snapshot tests using the verify.tool dotnet local tool.

Discovery

To list all test files using Verify snapshots:

bash
rg -l "Verifier\.Verify|UsesVerify|\.verified\." --type cs

To scope to a specific directory:

bash
rg -l "Verifier\.Verify|UsesVerify|\.verified\." --type cs <path/to/test/directory>

Update Snapshots

To update snapshots after intentional code changes:

  1. Build the solution:

    bash
    dotnet build -p:WarningLevel=0 /clp:ErrorsOnly --verbosity minimal

  2. Run affected verify tests (they fail, generating .received. files):

    bash
    dotnet test <test-project> --no-build --filter "FullyQualifiedName~<TestClass>" -v m

  3. Accept all new snapshots:

    bash
    dotnet verify accept -y

    To scope to a specific directory:

    bash
    dotnet verify accept -y -w <path/to/test/directory>

  4. Re-run tests to confirm they pass:

    bash
    dotnet test <test-project> --no-build --filter "FullyQualifiedName~<TestClass>" -v m

File Conventions

  • ClassName.MethodName.verified.txt — accepted snapshot (committed to git)
  • ClassName.MethodName.received.txt — latest test output (not committed, gitignored)
  • Parameterized tests: ClassName.MethodName_param=value.verified.txt

Quick Reference

Command Purpose
dotnet verify accept -y Accept all pending snapshots
dotnet verify accept -y -w <dir> Accept snapshots in specific directory
rg -l "Verifier\.Verify|UsesVerify|\.verified\." --type cs List all test files using Verify

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