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Vitest · Matcher

toSatisfy

toSatisfy checks a value with a custom predicate. The assertion passes when the predicate returns true; use .not to reverse the check.

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Syntax

expect(value).toSatisfy(predicate)

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  • expect
  • not
  • toBe
  • toEqual

Source: Using Matchers | Guide | Vitest. Checked 2026-11-03.