async-custom-formats-write-read-web-prefix.tentative.https.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /clipboard-apis/async-custom-formats-write-read-web-prefix.tentative.https.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset="utf-8">

<title>Async Clipboard web custom format read/write test.</title>

<link rel="help" href="https://w3c.github.io/clipboard-apis/#async-clipboard-api">

<body>Body needed for test_driver.click()</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>

<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 navigator.clipboard.read();

  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');

</script>