A testing library for Blazor components that enables fast, comprehensive unit tests with C# or Razor syntax.
bUnit is a testing library for Blazor components that enables developers to write fast, comprehensive unit tests. It allows rendering and controlling a component's lifecycle, passing parameters, injecting services, triggering event handlers, and verifying rendered markup using semantic HTML comparison. The library runs tests in milliseconds, making it significantly faster than browser-based UI testing approaches.
Blazor developers and .NET engineers who need to write reliable unit tests for their Blazor components and applications. It's particularly useful for teams adopting test-driven development (TDD) or wanting to improve their Blazor application's test coverage.
Developers choose bUnit because it provides a familiar unit testing experience specifically tailored for Blazor components, with fast execution times and comprehensive testing capabilities. Unlike browser-based tests, bUnit tests run in milliseconds and integrate directly with existing .NET testing frameworks.
bUnit is a testing library for Blazor components that make tests look, feel, and runs like regular unit tests. bUnit makes it easy to render and control a component under test’s life-cycle, pass parameter and inject services into it, trigger event handlers, and verify the rendered markup from the component using a built-in semantic HTML comparer.
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Tests run in milliseconds, as emphasized in the README, making it dramatically faster than browser-based UI tests that take seconds.
Integrates with popular .NET testing frameworks like xUnit, NUnit, MSTest, and TUnit, allowing Blazor component tests to run like regular unit tests.
Supports defining components using C# or Razor syntax, verifying rendered markup with semantic HTML comparer, and interacting with event handlers and state.
Includes mocking for IJSRuntime, Blazor authentication, and authorization, enabling isolated testing of components without external dependencies.
Uses a built-in semantic HTML comparer to accurately verify rendered markup, reducing false positives in test assertions.
bUnit 2.x only supports .NET 8 and above, which can be a barrier for projects stuck on older .NET versions like .NET Core 3.1 to .NET 7.
It is designed exclusively for Blazor, so it cannot be used for testing components in other web frameworks, limiting its versatility.
Testing components with intricate JavaScript interop may require extensive mocking setups, which can be cumbersome and increase test maintenance overhead.