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

<script src="../../../bower_components/webcomponentsjs/webcomponents-lite.min.js"></script>
<script src="../../../bower_components/web-component-tester/browser.js"></script>
<link rel="import" href="../../../test/common-test-setup.html"/>

<script src="gr-etag-decorator.js"></script>

<script>
  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>