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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-select</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>

<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 type="module">
import '../../../test/common-test-setup.js';
import './gr-select.js';
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.dispatchEvent(
        new CustomEvent('change', {
          composed: true, bubbles: true,
        }));

    // 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>