How do I handle dynamic values like current dates or GUIDs in snapshots?

The skill utilizes 'scrubbing,' a technique where non-deterministic values are automatically replaced with stable placeholders (like Guid_1 or DateTime_1) during the verification process.

What version of .NET is required?

This skill is designed for modern .NET development, specifically targeting a .NET 8.0 baseline and Verify 20.x or higher.

Can this skill help with integration testing?

Yes, it specifically covers verifying HTTP responses, which is a common use case when combined with WebApplicationFactory for API integration tests.

What is snapshot testing in .NET?

Snapshot testing, also known as approval testing, involves capturing the output of a test as a baseline file and comparing future test results against that 'verified' file to detect changes.

Which .NET test frameworks are compatible with this skill?

The skill provides guidance for the Verify library, which supports all major .NET test frameworks including xUnit, NUnit, and MSTest.

.NET Snapshot Testing with Verify

Name: .NET Snapshot Testing with Verify
Author: rudironsoni

byrudironsoni

0•

Security & Testing

Implements robust snapshot and approval testing for .NET applications using the Verify library to validate complex objects and API responses.

This skill provides comprehensive guidance for implementing snapshot (approval) testing in .NET environments using the popular Verify library. It enables developers to capture, review, and approve complex outputs—ranging from serialized objects and API responses to rendered HTML emails—by comparing them against stable baseline files. The skill focuses on managing the test lifecycle, implementing 'scrubbers' to handle non-deterministic data like GUIDs and timestamps, and integrating seamlessly with xUnit, NUnit, or MSTest to ensure high-fidelity regression testing with minimal manual assertions.

Key Features

01Automated baseline comparison for complex .NET objects and API responses

02Customizable serialization and domain-specific converters for specialized types

03Verification support for HTTP responses, streams, and rendered email templates

040 GitHub stars

05Advanced scrubbing patterns for non-deterministic values like dates and GUIDs

06Deep integration with xUnit, NUnit, and MSTest frameworks

Use Cases

01Locking down REST API contracts by verifying full HTTP response objects and headers

02Testing complex object serialization and domain model states without writing hundreds of manual assertions

03Validating the visual and structural integrity of rendered HTML reports or email templates

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add rudironsoni/rulesync-dotnet dotnet-snapshot-testing

For use in Claude.ai and ChatGPT

Key Features

01Automated baseline comparison for complex .NET objects and API responses

02Customizable serialization and domain-specific converters for specialized types

03Verification support for HTTP responses, streams, and rendered email templates

040 GitHub stars

05Advanced scrubbing patterns for non-deterministic values like dates and GUIDs

06Deep integration with xUnit, NUnit, and MSTest frameworks

Use Cases

01Locking down REST API contracts by verifying full HTTP response objects and headers

02Testing complex object serialization and domain model states without writing hundreds of manual assertions

03Validating the visual and structural integrity of rendered HTML reports or email templates