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Variable: toBeErr

const toBeErr: MatcherFunction

Defined in: testing/matchers/result.ts:111

Assert that a Result is Err, optionally checking the error.

Example​

import { expect } from 'vitest'
import { ok, err } from 'receta/result'

expect(err('fail')).toBeErr()          // Pass
expect(err('fail')).toBeErr('fail')    // Pass
expect(err('fail')).toBeErr('other')   // Fail
expect(ok(5)).not.toBeErr()            // Pass