Jest

Recipes that cleanup Jest code.

Recipes

• Disallow Jasmine globals
• Disallow alias methods
• Disallow use of deprecated functions from before version 27
• Disallow using jest.mock() factories without an explicit type parameter
• Enforce lowercase test names
• Enforce test and it usage conventions
• Enforce valid titles
• Prefer await expect(...).resolves over expect(await ...) syntax
• Prefer mock resolved/rejected shorthands for promises
• Recommended Jest code cleanup
• Require using .only and .skip over f and x
• Suggest using jest.spyOn()
• Suggest using test.todo
• Suggest using the built-in comparison matchers
• Suggest using toBe() for primitive literals
• Suggest using toContain()
• Suggest using toHaveLength()