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Test Info:
- Manifest: dom/canvas/test/mochitest.toml
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
</head>
<body>
<script>
"use strict";
SimpleTest.waitForExplicitFinish();
async function expectInvalidStateMessage(promise, expectedSubstring, label) {
try {
await promise;
ok(false, `${label}: expected rejection, got resolution`);
} catch (e) {
is(e.name, "InvalidStateError", `${label}: error name`);
ok(
typeof e.message === "string" && e.message.includes(expectedSubstring),
`${label}: message should include "${expectedSubstring}" (got: "${e.message}")`
);
}
}
async function run() {
// HTMLImageElement that has no source data. Per HTML, an <img> with no src
// is "complete", so this exercises the GetSurfaceFromElement no-surface
// path rather than the !Complete() branch.
await expectInvalidStateMessage(
createImageBitmap(new Image()),
"could not be decoded",
"HTMLImageElement, no source"
);
// HTMLVideoElement with no src (NETWORK_EMPTY).
await expectInvalidStateMessage(
createImageBitmap(document.createElement("video")),
"has not loaded any data",
"HTMLVideoElement, NETWORK_EMPTY"
);
// <canvas> with width 0.
{
const canvas = document.createElement("canvas");
canvas.width = 0;
canvas.height = 10;
await expectInvalidStateMessage(
createImageBitmap(canvas),
"width 0",
"HTMLCanvasElement, width 0"
);
}
// <canvas> with height 0.
{
const canvas = document.createElement("canvas");
canvas.width = 10;
canvas.height = 0;
await expectInvalidStateMessage(
createImageBitmap(canvas),
"height 0",
"HTMLCanvasElement, height 0"
);
}
// Closed (detached) ImageBitmap.
{
const canvas = document.createElement("canvas");
canvas.width = 10;
canvas.height = 10;
const bitmap = await createImageBitmap(canvas);
bitmap.close();
await expectInvalidStateMessage(
createImageBitmap(bitmap),
"closed or transferred",
"Detached ImageBitmap"
);
}
// Blob whose contents cannot be decoded as an image (Jake's headline case
await expectInvalidStateMessage(
createImageBitmap(new Blob(["YO"])),
"could not be decoded",
"Undecodable Blob"
);
SimpleTest.finish();
}
run();
</script>
</body>
</html>