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

<script src="../../../bower_components/webcomponentsjs/webcomponents.min.js"></script>
<script src="../../../bower_components/web-component-tester/browser.js"></script>

<link rel="import" href="../../../bower_components/iron-test-helpers/iron-test-helpers.html">
<link rel="import" href="gr-diff-selection.html">

<test-fixture id="basic">
  <template>
    <gr-diff-selection>
      <table class="side-by-side">
        <tr>
          <td class="lineNum left" data-value="1">1</td>
          <td class="content">
            <div class="contentText" data-side="left">ba ba</div>
          </td>
          <td class="lineNum right" data-value="1">1</td>
          <td class="content">
            <div class="contentText" data-side="right">some other text</div>
          </td>
        </tr>
        <tr>
          <td class="lineNum left" data-value="2">2</td>
          <td class="content">
            <div class="contentText" data-side="left">zin</div>
          </td>
          <td class="lineNum right" data-value="2">2</td>
          <td class="content">
            <div class="contentText" data-side="right">more more more</div>
          </td>
        </tr>
        <tr>
          <td class="lineNum left" data-value="3">3</td>
          <td class="content">
            <div class="contentText" data-side="left">ga ga</div>
          </td>
          <td class="lineNum right" data-value="3">3</td>
          <td class="other">
            <div class="contentText" data-side="right">some other text</div>
          </td>
        </tr>
      </table>
    </gr-diff-selection>
  </template>
</test-fixture>

<script>
  suite('gr-diff-selection', function() {
    var element;

    var emulateCopyOn = function(target) {
      var fakeEvent = {
        target: target,
        preventDefault: sinon.stub(),
        clipboardData: {
          setData: sinon.stub(),
        },
      };
      element._handleCopy(fakeEvent);
      return fakeEvent;
    };

    setup(function() {
      element = fixture('basic');
      element._cachedDiffBuilder = {
        getLineElByChild: sinon.stub().returns({}),
        getSideByLineEl: sinon.stub(),
      };
      element.diff = {
        content: [
          {
            a: ['ba ba'],
            b: ['some other text'],
          },
          {
            a: ['zin'],
            b: ['more more more'],
          },
          {
            a: ['ga ga'],
            b: ['some other text'],
          },
        ],
      };
    });

    test('applies selected-left on left side click', function() {
      element.classList.add('selected-right');
      element._cachedDiffBuilder.getSideByLineEl.returns('left');
      MockInteractions.down(element);
      assert.isTrue(
          element.classList.contains('selected-left'), 'adds selected-left');
      assert.isFalse(
          element.classList.contains('selected-right'),
          'removes selected-right');
    });

    test('applies selected-right on right side click', function() {
      element.classList.add('selected-left');
      element._cachedDiffBuilder.getSideByLineEl.returns('right');
      MockInteractions.down(element);
      assert.isTrue(
          element.classList.contains('selected-right'), 'adds selected-right');
      assert.isFalse(
          element.classList.contains('selected-left'), 'removes selected-left');
    });

    test('ignores copy for non-content Element', function() {
      sinon.stub(element, '_getSelectedText');
      emulateCopyOn(element.querySelector('.other'));
      assert.isFalse(element._getSelectedText.called);
    });

    test('asks for text for right side Elements', function() {
      element._cachedDiffBuilder.getSideByLineEl.returns('left');
      sinon.stub(element, '_getSelectedText');
      emulateCopyOn(element.querySelector('div.contentText'));
      assert.deepEqual(['left'], element._getSelectedText.lastCall.args);
    });

    test('reacts to copy for content Elements', function() {
      sinon.stub(element, '_getSelectedText');
      emulateCopyOn(element.querySelector('div.contentText'));
      assert.isTrue(element._getSelectedText.called);
    });

    test('copy event is prevented for content Elements', function() {
      sinon.stub(element, '_getSelectedText');
      var event = emulateCopyOn(element.querySelector('div.contentText'));
      assert.isTrue(event.preventDefault.called);
    });

    test('inserts text into clipboard on copy', function() {
      sinon.stub(element, '_getSelectedText').returns('the text');
      var event = emulateCopyOn(element.querySelector('div.contentText'));
      assert.deepEqual(
          ['Text', 'the text'], event.clipboardData.setData.lastCall.args);
    });

    test('copies content correctly', function() {
      // Fetch the line number.
      element._cachedDiffBuilder.getLineElByChild = function(child) {
        while (!child.classList.contains('content') && child.parentElement) {
          child = child.parentElement;
        }
        return child.previousElementSibling;
      };

      element.classList.add('selected-left');
      element.classList.remove('selected-right');

      var selection = window.getSelection();
      var range = document.createRange();
      range.setStart(element.querySelector('div.contentText').firstChild, 3);
      range.setEnd(
          element.querySelectorAll('div.contentText')[4].firstChild, 2);
      selection.addRange(range);
      assert.equal(element._getSelectedText('left'), 'ba\nzin\nga');
    });
  });
</script>