Happo.io vs Fluent Assertions: What are the differences?

Developers describe Happo.io as "Cross-platform, cross-browser screenshot testing for modern user interfaces". Happo is a visual regression testing tool. It hooks into your CI environment to compare the visual appearance of UI components before and after a change. Screenshots are taken in different browsers and across different screen sizes to ensure consistent cross-browser and responsive styling of your application. On the other hand, Fluent Assertions is detailed as "Library to build fluent assertions for unity testing". A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. Targets .NET Framework 4.5 and 4.7, as well as .NET Core 2.0, .NET Core 3.0, .NET Standard 1.3, 1.6 and 2.0.

Happo.io and Fluent Assertions can be primarily classified as "Testing Frameworks" tools.

Some of the features offered by Happo.io are:

• No more manual parsing of CSS
• See the effects of changes directly
• Test individual components in isolation

On the other hand, Fluent Assertions provides the following key features:

• Intention-Revealing Unit Tests
• Targets .NET 4.5, .NET 4.7, .NET Core 2.0, .NET Standard 1.3, 1.6 and 2.0 and is compatible .NET Core 3.0
• Supports MSTest, xUnit, NUnit, Gallio, MBUnit, MSpec and NSpec.