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Test Info: Warnings

<!doctype html>
<meta charset="utf-8">
<title>Async Clipboard web custom format read/write test.</title>
<body>Body needed for</body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="resources/user-activation.js"></script>
'use strict';
promise_test(async t => {
await tryGrantReadPermission();
await tryGrantWritePermission();
const format1 = 'web text/plain';
const format2 = 'web text/plain';
const blobInput1 = new Blob(['input data 1'], {type: format2});
const clipboardItemInput = new ClipboardItem(
{[format1]: blobInput1});
await waitForUserActivation();
await navigator.clipboard.write([clipboardItemInput]);
await waitForUserActivation();
const clipboardItems = await;
assert_equals(clipboardItems.length, 1);
const clipboardItem = clipboardItems[0];
assert_true(clipboardItem instanceof ClipboardItem);
// This test can't verify clipboardItem.types, because its size and values
// are both platform-dependent.
const blobOutput1 = await clipboardItem.getType(format1);
assert_equals(blobOutput1.type, format1);
const data1 = await (new Response(blobOutput1)).text();
assert_equals(data1, 'input data 1');
}, 'navigator.clipboard.write() for custom format and Blob type with web prefix');