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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/the-img-element/decode/image-decode.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<meta charset=utf-8>
<meta name="timeout" content="long">
<title>HTMLImageElement.prototype.decode(), basic tests.</title>
<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
"use strict";
// src tests
// -------------------
promise_test(function() {
var img = new Image();
img.src = "/images/green.png";
return img.decode().then(function(arg) {
assert_equals(arg, undefined);
});
}, document.title + " Image with PNG src decodes with undefined.");
promise_test(function() {
var img = new Image();
img.src = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAA" +
"D91JpzAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH4QUSEioKsyAgyw" +
"AAABl0RVh0Q29tbWVudABDcmVhdGVkIHdpdGggR0lNUFeBDhcAAAAWSURBVA" +
"jXY9y3bx8DAwPL58+fGRgYACktBRltLfebAAAAAElFTkSuQmCC";
return img.decode().then(function(arg) {
assert_equals(arg, undefined);
});
}, document.title + " Image with PNG data URL src decodes with undefined.");
promise_test(function() {
var img = new Image();
img.src = "/images/green.svg";
return img.decode().then(function(arg) {
assert_equals(arg, undefined);
});
}, document.title + " Image with SVG src decodes with undefined.");
promise_test(function(t) {
var img = new Image();
img.src = "/non/existent/path.png";
var promise = img.decode();
return promise_rejects_dom(t, "EncodingError", promise);
}, document.title + " Non-existent src fails decode.");
promise_test(function(t) {
var inactive_doc = document.implementation.createHTMLDocument();
var img = inactive_doc.createElement("img");
img.src = "/images/green.png";
var promise = img.decode();
return promise_rejects_dom(t, "EncodingError", promise);
}, document.title + " Inactive document fails decode.");
promise_test(function(t) {
var inactive_doc = document.implementation.createHTMLDocument();
var img = document.createElement("img");
img.src = "/images/green.png";
var promise = img.decode();
inactive_doc.body.appendChild(img);
return promise_rejects_dom(t, "EncodingError", promise);
}, document.title + " Adopted active image into inactive document fails decode.");
promise_test(function() {
var inactive_doc = document.implementation.createHTMLDocument();
var img = inactive_doc.createElement("img");
img.src = "/images/green.png";
document.body.appendChild(img);
return img.decode().then(function(arg) {
assert_equals(arg, undefined);
});
}, document.title + " Adopted inactive image into active document succeeds.");
promise_test(function(t) {
var img = new Image();
img.src = "data:image/png;base64,iVBO00PDR0BADBEEF00KGg";
var promise = img.decode();
return promise_rejects_dom(t, "EncodingError", promise);
}, document.title + " Corrupt image in src fails decode.");
promise_test(function(t) {
var img = new Image();
var promise = img.decode();
return promise_rejects_dom(t, "EncodingError", promise);
}, document.title + " Image without src/srcset fails decode.");
promise_test(function() {
var img = new Image();
img.src = "/images/green.png";
var first_promise = img.decode();
var second_promise = img.decode();
assert_not_equals(first_promise, second_promise);
return Promise.all([
first_promise,
second_promise
]);
}, document.title + " Multiple decodes for images with src succeed.");
// srcset tests
// -------------------
promise_test(function() {
var img = new Image();
img.srcset = "/images/green.png 100w";
return img.decode().then(function(arg) {
assert_equals(arg, undefined);
});
}, document.title + " Image with PNG srcset decodes with undefined.");
promise_test(function() {
var img = new Image();
img.srcset = "/images/green.svg 100w";
return img.decode().then(function(arg) {
assert_equals(arg, undefined);
});
}, document.title + " Image with SVG srcset decodes with undefined.");
promise_test(function(t) {
var img = new Image();
img.srcset = "/non/existent/path.png 100w";
var promise = img.decode();
return promise_rejects_dom(t, "EncodingError", promise);
}, document.title + " Non-existent srcset fails decode.");
promise_test(function() {
var img = new Image();
img.srcset = "/images/green.png 100w";
var first_promise = img.decode();
var second_promise = img.decode();
assert_not_equals(first_promise, second_promise);
return Promise.all([
first_promise,
second_promise
]);
}, document.title + " Multiple decodes for images with srcset succeed.");
</script>