1 | /**
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2 | * Setup a mock hammer.js object, for unit testing.
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3 | *
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4 | * Inspiration: https://github.com/uber/deck.gl/pull/658
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5 | *
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6 | * @returns {{on: noop, off: noop, destroy: noop, emit: noop, get: get}}
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7 | */
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8 | function hammerMock() {
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9 | const noop = () => {};
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10 |
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11 | return {
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12 | on: noop,
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13 | off: noop,
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14 | destroy: noop,
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15 | emit: noop,
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16 |
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17 | get: function(m) { //eslint-disable-line no-unused-vars
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18 | return {
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19 | set: noop
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20 | };
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21 | }
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22 | };
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23 | }
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24 |
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25 |
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26 | if (typeof window !== 'undefined') {
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27 | var propagating = require('propagating-hammerjs');
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28 | var Hammer = window['Hammer'] || require('hammerjs');
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29 | module.exports = propagating(Hammer, {
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30 | preventDefault: 'mouse'
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31 | });
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32 | }
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33 | else {
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34 | module.exports = function () {
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35 | // hammer.js is only available in a browser, not in node.js. Replacing it with a mock object.
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36 | return hammerMock();
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37 | }
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38 | }
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