| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>Blob methods from detached frame work as expected</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <iframe id="emptyDocumentIframe" src="../support/empty-document.html"></iframe> |
| |
| <script> |
| const BlobPrototypeFromDetachedFramePromise = new Promise(resolve => { |
| emptyDocumentIframe.onload = () => { |
| const BlobPrototype = emptyDocumentIframe.contentWindow.Blob.prototype; |
| emptyDocumentIframe.remove(); |
| resolve(BlobPrototype); |
| }; |
| }); |
| |
| const charCodeArrayToString = charCodeArray => Array.from(charCodeArray, c => String.fromCharCode(c)).join(""); |
| const charCodeBufferToString = charCodeBuffer => charCodeArrayToString(new Uint8Array(charCodeBuffer)); |
| |
| promise_test(async () => { |
| const { slice } = await BlobPrototypeFromDetachedFramePromise; |
| const blob = new Blob(["foobar"]); |
| |
| const slicedBlob = slice.call(blob, 1, 3); |
| assert_true(slicedBlob instanceof Blob); |
| |
| assert_equals(await slicedBlob.text(), "oo"); |
| assert_equals(charCodeBufferToString(await slicedBlob.arrayBuffer()), "oo"); |
| |
| const reader = slicedBlob.stream().getReader(); |
| const { value } = await reader.read(); |
| assert_equals(charCodeArrayToString(value), "oo"); |
| }, "slice()"); |
| |
| promise_test(async () => { |
| const { text } = await BlobPrototypeFromDetachedFramePromise; |
| const blob = new Blob(["foo"]); |
| |
| assert_equals(await text.call(blob), "foo"); |
| }, "text()"); |
| |
| promise_test(async () => { |
| const { arrayBuffer } = await BlobPrototypeFromDetachedFramePromise; |
| const blob = new Blob(["bar"]); |
| |
| const charCodeBuffer = await arrayBuffer.call(blob); |
| assert_equals(charCodeBufferToString(charCodeBuffer), "bar"); |
| }, "arrayBuffer()"); |
| |
| promise_test(async () => { |
| const { stream } = await BlobPrototypeFromDetachedFramePromise; |
| const blob = new Blob(["baz"]); |
| |
| const reader = stream.call(blob).getReader(); |
| const { value } = await reader.read(); |
| assert_equals(charCodeArrayToString(value), "baz"); |
| }, "stream()"); |
| </script> |
