language-model-response-regex.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/language-model/language-model-response-regex.tentative.https.window.html - WPT Dashboard Interop Dashboard

// META: title=Language Model Response Regex

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

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

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

// META: timeout=long

'use strict';

promise_test(async t => {

  await ensureLanguageModel();

  const session = await createLanguageModel();

  const response =

      await session.prompt(kTestPrompt, {responseConstraint: /hello/});

  assert_true(typeof response === 'string');

}, 'Prompt should work with a valid regex constraint.');

promise_test(async t => {

  await ensureLanguageModel();

  const session = await createLanguageModel();

  const goodPrefix = 'Greetings';

  const response = await session.prompt(

        {role: 'user', content: 'hello'},

        {role: 'assistant', content: goodPrefix, prefix: true}

],

      {responseConstraint: /^Greetings and salutations.*/});

  assert_true(typeof response === 'string');

}, 'Prompt should work with a valid regex constraint and matching prefix.');

promise_test(async t => {

  await ensureLanguageModel();

  const session = await createLanguageModel();

  const badPrefix = 'invalid';

  await promise_rejects_dom(

      t, 'NotSupportedError',

      session.prompt(

            {role: 'user', content: 'hello'},

            {role: 'assistant', content: badPrefix, prefix: true}

],

          {responseConstraint: /^Greetings and salutations.*/}),

      'The request is invalid - the input or options could not be processed.');

}, 'Prompt should reject if the prefix deviates from the regex constraint.');