Testing Blazor components overview

Testing software is a crucial part of the development process, not only in SPAs and Blazor WebAssembly but in all elements of software. Testing as a term has multiple meanings and approaches in the software industry and long books could be written about it, but we will focus on component testing developed in Blazor WebAssembly. We will examine the two testing types: unit testing and E2E testing.

For every feature we have developed so far, if we run the project, navigate to the target page or component, and use it to see if it will behave as expected, we are only conducting one type of testing. This type of testing is called end user testing, which is not reliable. To ensure the app logic, behavior, and components are working as expected, tests should be written at the code level, so more common and rare scenarios can be simulated.

The first type of testing we will examine is called unit testing, which is a fundamental type of testing in software...