summarizer-summarize-streaming.tentative.https.window.js

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This test has a WPT meta file that expects 3 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /ai/summarizer/speed/summarizer-summarize-streaming.tentative.https.window.html - WPT Dashboard Interop Dashboard

// META: title=Summarizer Speed Preference Summarize Streaming

// META: script=/resources/testdriver.js

// META: script=../../resources/util.js

// META: timeout=long

'use strict';

const kSpeedOptions = {preference: 'speed', outputLanguage: 'en'};

promise_test(async () => {

  const summarizer = await createSummarizer(kSpeedOptions);

  const streamingResponse = summarizer.summarizeStreaming(kTestPrompt);

  assert_true(streamingResponse instanceof ReadableStream);

  const result = (await Array.fromAsync(streamingResponse)).join('');

  assert_greater_than(result.length, 0, 'The result should not be empty.');

}, 'Simple Summarizer.summarizeStreaming() call with speed preference');

promise_test(async t => {

  const summarizer = await createSummarizer(kSpeedOptions);

  const stream = summarizer.summarizeStreaming(kTestPrompt);

  summarizer.destroy();

  await promise_rejects_dom(

      t, 'AbortError', stream.pipeTo(new WritableStream()));

}, 'Summarizer.summarizeStreaming() with speed preference fails after destroyed');

promise_test(async () => {

  const summarizer = await createSummarizer(kSpeedOptions);

  const streamingResponse = summarizer.summarizeStreaming('');

  assert_true(streamingResponse instanceof ReadableStream);

  const {done} = await streamingResponse.getReader().read();

  assert_true(done);

}, 'Summarizer.summarizeStreaming() with speed preference returns a ReadableStream without any chunk on an empty input');