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

<script src="/bower_components/webcomponentsjs/custom-elements-es5-adapter.js"></script>

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

<script>void(0);</script>

<test-fixture id="basic">
  <template>
    <gr-select>
      <select>
        <option value="1">One</option>
        <option value="2">Two</option>
        <option value="3">Three</option>
      </select>
    </gr-select>
  </template>
</test-fixture>

<test-fixture id="noOptions">
  <template>
    <gr-select>
      <select>
      </select>
    </gr-select>
  </template>
</test-fixture>

<script>
  suite('gr-select tests', () => {
    let element;

    setup(() => {
      element = fixture('basic');
    });

    test('bindValue must be set to the first option value', () => {
      assert.equal(element.bindValue, '1');
    });

    test('value of 0 should still trigger value updates', () => {
      element.bindValue = 0;
      assert.equal(element.nativeSelect.value, 0);
    });

    test('bidirectional binding property-to-attribute', () => {
      const changeStub = sinon.stub();
      element.addEventListener('bind-value-changed', changeStub);

      // The selected element should be the first one by default.
      assert.equal(element.nativeSelect.value, '1');
      assert.equal(element.bindValue, '1');
      assert.isFalse(changeStub.called);

      // Now change the value.
      element.bindValue = '2';

      // It should be updated.
      assert.equal(element.nativeSelect.value, '2');
      assert.equal(element.bindValue, '2');
      assert.isTrue(changeStub.called);
    });

    test('bidirectional binding attribute-to-property', () => {
      const changeStub = sinon.stub();
      element.addEventListener('bind-value-changed', changeStub);

      // The selected element should be the first one by default.
      assert.equal(element.nativeSelect.value, '1');
      assert.equal(element.bindValue, '1');
      assert.isFalse(changeStub.called);

      // Now change the value.
      element.nativeSelect.value = '3';
      element.fire('change');

      // It should be updated.
      assert.equal(element.nativeSelect.value, '3');
      assert.equal(element.bindValue, '3');
      assert.isTrue(changeStub.called);
    });
  });

  suite('gr-select no options tests', () => {
    let element;

    setup(() => {
      element = fixture('noOptions');
    });

    test('bindValue must not be changed', () => {
      assert.isUndefined(element.bindValue);
    });
  });
</script>