Testing in Blazor: A complete tutorial

Blazor, a C# development extension, allows developers to build applications for browsers without relying on traditional JavaScript frameworks like React, Vue.js, or Angular. Testing Blazor apps can be complex, requiring specific tools and packages to effectively set up and test the applications. This guide details the process of setting up a test environment for a Blazor application using Visual Studio, creating both application and test projects, and linking them. It emphasizes using bUnit, xUnit, and Moq for testing Blazor components, including rendering components, passing parameters, injecting services, and triggering events. The guide also covers advanced testing techniques such as mocking JavaScript interactions with IJSRuntime, simulating HTTP requests using mocked clients, and ensuring asynchronous data states are correctly handled. The article concludes by suggesting that while bUnit is primarily discussed in the context of xUnit, it can also be utilized with other frameworks like nUnit, with further advanced use cases available in the bUnit documentation.

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