measure.tentative.https.window.js

Enable keyboard shortcuts

This test has a WPT meta file that expects 2 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /ai/language-model/prompt/context/measure.tentative.https.window.html - WPT Dashboard Interop Dashboard

// META: title=Language Model Measure Input Usage

// 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 result = await session.measureContextUsage('This is a prompt.');

  assert_equals(typeof result, 'number');

  assert_greater_than(result, 0);

}, 'measureContextUsage returns a number greater than zero for text');

promise_test(async t => {

  const prompts = [

    {role: 'system', content: 'foo'},

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

    {role: 'assistant', content: 'baz'},

];

  await ensureLanguageModel();

  const session = await createLanguageModel({initialPrompts: prompts});

  const result = await session.measureContextUsage(prompts);

  assert_equals(typeof result, 'number');

  assert_greater_than(result, 0);

}, 'measure message sequences of various roles, even after adding prompts');