Utility for tape to compare numbers, arrays, or nested arrays up to some tolerance, with helpful error output on test failure. Uses allclose and inspired by test-fuzzy-array.

use npm

npm install test-allclose

require with

var allclose = require('test-allclose')

then use with a test instance t of tape or similar

var close = allclose(t)

to get a function close(a, b, [atol], [rtol]) that, when called on two arrays a and b, will execute tests using the test instance t and generate useful output on test failure

setup tests using tape as usual

var test = require('tape')

then inside a test call

test('arrays', function (t) {
  allclose(t)([1, 2], [1, 3])
  t.end()
})

you can test numbers

allclose(t)(1, 1)
> test passes

allclose(t)(1, 2)
> test fails

or arrays

allclose(t)([1, 2], [1, 2])
> test passes

allclose(t)([1, 2], [1, 3])
> test fails

or nested arrays

allclose(t)([[1, 2], [3, 4]], [[1, 2], [3, 4]])
> test passes

allclose(t)([[1, 2], [3, 4]], [[1, 2], [3, 5]])
> test fails

and you can optionally specify a tolerance

allclose(t)([1, 2], [1, 2.1])
> test fails

allclose(t)([1, 2], [1, 2.1], 0.3)
> test passes