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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-diff-mode-selector</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 src="/node_modules/page/page.js"></script>

<test-fixture id="basic">
  <template>
    <gr-diff-mode-selector></gr-diff-mode-selector>
  </template>
</test-fixture>

<script type="module">
import '../../../test/common-test-setup.js';
import './gr-diff-mode-selector.js';
suite('gr-diff-mode-selector tests', () => {
  let element;
  let sandbox;

  setup(() => {
    sandbox = sinon.sandbox.create();
    element = fixture('basic');
  });

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

  test('_computeSelectedClass', () => {
    assert.equal(
        element._computeSelectedClass('SIDE_BY_SIDE', 'SIDE_BY_SIDE'),
        'selected');
    assert.equal(
        element._computeSelectedClass('SIDE_BY_SIDE', 'UNIFIED_DIFF'), '');
  });

  test('setMode', () => {
    const saveStub = sandbox.stub(element.$.restAPI, 'savePreferences');

    // Setting the mode initially does not save prefs.
    element.saveOnChange = true;
    element.setMode('SIDE_BY_SIDE');
    assert.isFalse(saveStub.called);

    // Setting the mode to itself does not save prefs.
    element.setMode('SIDE_BY_SIDE');
    assert.isFalse(saveStub.called);

    // Setting the mode to something else does not save prefs if saveOnChange
    // is false.
    element.saveOnChange = false;
    element.setMode('UNIFIED_DIFF');
    assert.isFalse(saveStub.called);

    // Setting the mode to something else does not save prefs if saveOnChange
    // is false.
    element.saveOnChange = true;
    element.setMode('SIDE_BY_SIDE');
    assert.isTrue(saveStub.calledOnce);
  });
});
</script>