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<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
<meta charset="utf-8">
<title>gr-etag-decorator</title>

<script src="/node_modules/@webcomponents/webcomponentsjs/custom-elements-es5-adapter.js"></script>

<script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-lite.js"></script>
<script src="/components/wct-browser-legacy/browser.js"></script>
<script type="module">
import '../../../test/common-test-setup.js';
import {GrEtagDecorator} from './gr-etag-decorator.js';

suite('gr-etag-decorator', () => {
  let etag;
  let sandbox;

  const fakeRequest = (opt_etag, opt_status) => {
    const headers = new Headers();
    if (opt_etag) {
      headers.set('etag', opt_etag);
    }
    const status = opt_status || 200;
    return {ok: true, status, headers};
  };

  setup(() => {
    sandbox = sinon.sandbox.create();
    etag = new GrEtagDecorator();
  });

  teardown(() => {
    sandbox.restore();
  });

  test('exists', () => {
    assert.isOk(etag);
  });

  test('works', () => {
    etag.collect('/foo', fakeRequest('bar'));
    const options = etag.getOptions('/foo');
    assert.strictEqual(options.headers.get('If-None-Match'), 'bar');
  });

  test('updates etags', () => {
    etag.collect('/foo', fakeRequest('bar'));
    etag.collect('/foo', fakeRequest('baz'));
    const options = etag.getOptions('/foo');
    assert.strictEqual(options.headers.get('If-None-Match'), 'baz');
  });

  test('discards empty etags', () => {
    etag.collect('/foo', fakeRequest('bar'));
    etag.collect('/foo', fakeRequest());
    const options = etag.getOptions('/foo', {headers: new Headers()});
    assert.isNull(options.headers.get('If-None-Match'));
  });

  test('discards etags in order used', () => {
    etag.collect('/foo', fakeRequest('bar'));
    _.times(29, i => {
      etag.collect('/qaz/' + i, fakeRequest('qaz'));
    });
    let options = etag.getOptions('/foo');
    assert.strictEqual(options.headers.get('If-None-Match'), 'bar');
    etag.collect('/zaq', fakeRequest('zaq'));
    options = etag.getOptions('/foo', {headers: new Headers()});
    assert.isNull(options.headers.get('If-None-Match'));
  });

  test('getCachedPayload', () => {
    const payload = 'payload';
    etag.collect('/foo', fakeRequest('bar'), payload);
    assert.strictEqual(etag.getCachedPayload('/foo'), payload);
    etag.collect('/foo', fakeRequest('bar', 304), 'garbage');
    assert.strictEqual(etag.getCachedPayload('/foo'), payload);
    etag.collect('/foo', fakeRequest('bar', 200), 'new payload');
    assert.strictEqual(etag.getCachedPayload('/foo'), 'new payload');
  });
});
</script>