Chapter 12. Writing snapshot tests
This chapter covers
- Understanding snapshot tests
- Adding snapshot tests to your workflow
- Writing snapshot tests for components
In this chapter, you’ll learn what snapshot tests are, how they fit in to the testing workflow, and how to use them to make sure components aren’t changed unintentionally.
Definition
Snapshot testing is a way of comparing two pictures of an application automatically.
Up until this chapter, you’ve learned to write unit tests. Now it’s time to add a new type of test to your testing tool belt. If you remember from back in chapter 1, I showed you how to use the frontend pyramid as a guide for how to structure a test suite (figure 12.1). The next type of tests in the ...
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