sharp/test/unit/fixtures.js

'use strict';

const assert = require('assert');
const fixtures = require('../fixtures');

describe('Test fixtures', function () {
  describe('assertMaxColourDistance', function () {
    it('should throw an Error when images have a different number of channels', function () {
      assert.throws(function () {
        fixtures.assertMaxColourDistance(fixtures.inputPngOverlayLayer1, fixtures.inputJpg);
      });
    });
    it('should throw an Error when images have different dimensions', function () {
      assert.throws(function () {
        fixtures.assertMaxColourDistance(fixtures.inputJpg, fixtures.inputJpgWithExif);
      });
    });
    it('should accept a zero threshold when comparing an image to itself', function () {
      const image = fixtures.inputPngOverlayLayer0;
      fixtures.assertMaxColourDistance(image, image, 0);
    });
    it('should accept a numeric threshold for two different images', function () {
      fixtures.assertMaxColourDistance(fixtures.inputPngOverlayLayer0, fixtures.inputPngOverlayLayer1, 100);
    });
  });
});