bypass-cache-revalidation.html

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This WPT test may be referenced by the following Test IDs:
- /html/dom/elements/images/bypass-cache-revalidation.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Cached images can bypass revalidation</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/common/utils.js"></script>

<div id="imageDiv1"></div>

<div id="imageDiv2"></div>

<canvas id="canvas"></canvas>

<script>

function getImagePixel(image)

    canvas.getContext("2d").drawImage(image, 0, 0, 10, 10);

    return canvas.getContext("2d").getImageData(0, 0, 1, 1).data;

let resolve;

promise_test(async (t) => {

   const url = "image.py?id=" + token();

   let promise = new Promise(r => resolve = r);

   imageDiv1.innerHTML = `<img src="${url}" onload="resolve()"></img>`;

   await promise;

   const url2 = "image.py?id=" + token();

   promise = new Promise(r => resolve = r);

   imageDiv1.innerHTML = `<img src="${url2}" onload="resolve()"></img>`;

   await promise;

   promise = new Promise(r => resolve = r);

   imageDiv2.innerHTML = `<img id="image2" src="${url}" onload="resolve()"></img>`;

   await promise;

   assert_array_equals(getImagePixel(image2), [0, 255, 0, 255]);

}, "Images can bypass no-cache");

</script>