42 lines
1.2 KiB
JavaScript
42 lines
1.2 KiB
JavaScript
module.exports = {
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/**
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* Validate whether a selector is visible in viewport
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*
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* @param {Object} page Page object
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* @param {String} selector Selector to validate
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* @returns Boolean
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*/
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isIntersectingViewport: async (page, selector) => {
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return page.$eval(selector, async el => {
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const bottom = window.innerHeight
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const rect = el.getBoundingClientRect()
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return rect.top < bottom && rect.top > 0 - rect.height
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})
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},
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/**
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* Override page DateTime with a new value
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*
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* @param {Object} page Page object
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* @param {Object} dateTimeOverride New DateTime object
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*/
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overridePageDateTime: async (page, dateTimeOverride) => {
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await page.addInitScript(`{
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// Extend Date constructor to default to fixed time
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Date = class extends Date {
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constructor(...args) {
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if (args.length === 0) {
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super(${dateTimeOverride.toMillis()});
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} else {
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super(...args);
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}
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}
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}
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// Override Date.now() to start from fixed time
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const __DateNowOffset = ${dateTimeOverride.toMillis()} - Date.now();
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const __DateNow = Date.now;
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Date.now = () => __DateNow() + __DateNowOffset;
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}`)
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}
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}
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