chape

This exports a helper method, which can be used to check a jsverify property with with tape.

If tape is new to you, see http://www.macwright.org/2014/03/11/tape-is-cool.html for some propaganda.

Usage

npm i --save-dev chape

then

const test = require('tape').test
const jsc = require('jsverify')
const check = require('check')

Simple example, showing something obvious isn't true

const is_not_zero = function (n) { return n !== 0 }
test('all integers are non-zero', function (t) {
	check(jsc.forall('integer', is_not_zero), t)
	t.end()
})

The TAP output:

TAP version 13
# all integers are non-zero
not ok 1 property does not hold! found counter example: 0
  ---
    operator: fail
    at: Test.t.check (./chape/index.js:12:6)
  ...

1..1
# tests 1
# pass  0
# fail  1

More

YMMV, there isn't much going on here, it's just a trivial helper, check the source.