Matchers
Everything on SkillVeris tagged Matchers — collected across the glossary, study notes, blog, and cheat sheets.
3 resources across 1 library
Study Notes(3)
Common Matchers: toBe, toEqual, toContain
Learn how Jest's core matchers toBe, toEqual, and toContain compare values, objects, and collections, and when to reach for each one.
Writing Custom Matchers
Learn how to extend Jest's expect with expect.extend() to write custom matchers that produce clearer, more expressive assertions and failure messages.
Truthiness and Number Matchers
Master Jest's matchers for null, undefined, and boolean-like values, plus numeric comparisons including safe handling of floating-point precision.