Jest TestsEdit this page
CodeSandbox has a native integration with Jest Tests for running tests.
You can run Jest tests by creating files that end with
.spec.js(x). We will automatically detect these test files and show the results in the bottom bar.
You can also open the test view instead of the browser preview by clicking on the 'Show Tests' icon in the top right.
The left side of the test view is an overview of all test files. The right side shows the details of a file when you select it.
You can decide to rerun tests manually by clicking on the Play icon. We automatically watch for file changes, you can disable this by clicking on the 'Refresh' icon on the left side.
We show failed tests in two ways: in the test overview and in the code editor itself.
A failed test looks like this in the Test View:
And will also show squiggles in the editor:
Here's an example sandbox running Jest tests: