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test-mixer

v4.1.14

Published

Test helper to generate function opts object variations

Downloads

58,875

Readme

Install

This package is pure ESM. If you're not ready yet, install an older version of this program, 2.1.0 (npm i [email protected]).

npm i test-mixer

Quick Take

import { strict as assert } from "assert";

import { mixer } from "test-mixer";

// check all possible combinations of all boolean opts:
const defaultOpts = {
  scrapeWindshield: true,
  checkOil: true,
  inflateTires: false,
  extinguishersCount: 1, // as non-boolean will be ignored
};

// generates 2^3 = 8 combinations all possible bools
assert.deepEqual(
  mixer(
    {
      // empty first arg object means you want all combinations
    },
    defaultOpts,
  ),
  [
    {
      scrapeWindshield: false,
      checkOil: false,
      inflateTires: false,
      extinguishersCount: 1,
    },
    {
      scrapeWindshield: true,
      checkOil: false,
      inflateTires: false,
      extinguishersCount: 1,
    },
    {
      scrapeWindshield: false,
      checkOil: true,
      inflateTires: false,
      extinguishersCount: 1,
    },
    {
      scrapeWindshield: true,
      checkOil: true,
      inflateTires: false,
      extinguishersCount: 1,
    },
    {
      scrapeWindshield: false,
      checkOil: false,
      inflateTires: true,
      extinguishersCount: 1,
    },
    {
      scrapeWindshield: true,
      checkOil: false,
      inflateTires: true,
      extinguishersCount: 1,
    },
    {
      scrapeWindshield: false,
      checkOil: true,
      inflateTires: true,
      extinguishersCount: 1,
    },
    {
      scrapeWindshield: true,
      checkOil: true,
      inflateTires: true,
      extinguishersCount: 1,
    },
  ],
);

// let's "pin" a value, prepare two sets of options objects,
// one where scrapeWindshield === true and another with "false"

// you'll get 2 ^ (3-1) = 4 variations:
const variationsWithScrapeWindshieldOn = mixer(
  {
    scrapeWindshield: true,
  },
  defaultOpts,
);
assert.deepEqual(variationsWithScrapeWindshieldOn, [
  {
    scrapeWindshield: true, // <--- pinned
    checkOil: false,
    inflateTires: false,
    extinguishersCount: 1,
  },
  {
    scrapeWindshield: true, // <--- pinned
    checkOil: true,
    inflateTires: false,
    extinguishersCount: 1,
  },
  {
    scrapeWindshield: true, // <--- pinned
    checkOil: false,
    inflateTires: true,
    extinguishersCount: 1,
  },
  {
    scrapeWindshield: true, // <--- pinned
    checkOil: true,
    inflateTires: true,
    extinguishersCount: 1,
  },
]);

// also 4 variations, similar but with scrapeWindshield === false pinned:
const variationsWithScrapeWindshieldOff = mixer(
  {
    scrapeWindshield: false,
  },
  defaultOpts,
);
assert.equal(variationsWithScrapeWindshieldOff.length, 4);

Documentation

Please visit codsen.com for a full description of the API.

Contributing

To report bugs or request features or assistance, raise an issue on GitHub.

Licence

MIT License.

Copyright © 2010-2024 Roy Revelt and other contributors.