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

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

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

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

<test-fixture id="basic">
  <template>
    <div>Lorem ipsum dolor sit amet, suspendisse inceptos vehicula</div>
  </template>
</test-fixture>

<script>
  suite('annotation', () => {
    let str;
    let parent;
    let textNode;

    setup(() => {
      parent = fixture('basic');
      textNode = parent.childNodes[0];
      str = textNode.textContent;
    });

    test('_annotateText Case 1', () => {
      GrAnnotation._annotateText(textNode, 0, str.length, 'foobar');

      assert.equal(parent.childNodes.length, 1);
      assert.instanceOf(parent.childNodes[0], HTMLElement);
      assert.equal(parent.childNodes[0].className, 'foobar');
      assert.instanceOf(parent.childNodes[0].childNodes[0], Text);
      assert.equal(parent.childNodes[0].childNodes[0].textContent, str);
    });

    test('_annotateText Case 2', () => {
      const length = 12;
      const substr = str.substr(0, length);
      const remainder = str.substr(length);

      GrAnnotation._annotateText(textNode, 0, length, 'foobar');

      assert.equal(parent.childNodes.length, 2);

      assert.instanceOf(parent.childNodes[0], HTMLElement);
      assert.equal(parent.childNodes[0].className, 'foobar');
      assert.instanceOf(parent.childNodes[0].childNodes[0], Text);
      assert.equal(parent.childNodes[0].childNodes[0].textContent, substr);

      assert.instanceOf(parent.childNodes[1], Text);
      assert.equal(parent.childNodes[1].textContent, remainder);
    });

    test('_annotateText Case 3', () => {
      const index = 12;
      const length = str.length - index;
      const remainder = str.substr(0, index);
      const substr = str.substr(index);

      GrAnnotation._annotateText(textNode, index, length, 'foobar');

      assert.equal(parent.childNodes.length, 2);

      assert.instanceOf(parent.childNodes[0], Text);
      assert.equal(parent.childNodes[0].textContent, remainder);

      assert.instanceOf(parent.childNodes[1], HTMLElement);
      assert.equal(parent.childNodes[1].className, 'foobar');
      assert.instanceOf(parent.childNodes[1].childNodes[0], Text);
      assert.equal(parent.childNodes[1].childNodes[0].textContent, substr);
    });

    test('_annotateText Case 4', () => {
      const index = str.indexOf('dolor');
      const length = 'dolor '.length;

      const remainderPre = str.substr(0, index);
      const substr = str.substr(index, length);
      const remainderPost = str.substr(index + length);

      GrAnnotation._annotateText(textNode, index, length, 'foobar');

      assert.equal(parent.childNodes.length, 3);

      assert.instanceOf(parent.childNodes[0], Text);
      assert.equal(parent.childNodes[0].textContent, remainderPre);

      assert.instanceOf(parent.childNodes[1], HTMLElement);
      assert.equal(parent.childNodes[1].className, 'foobar');
      assert.instanceOf(parent.childNodes[1].childNodes[0], Text);
      assert.equal(parent.childNodes[1].childNodes[0].textContent, substr);

      assert.instanceOf(parent.childNodes[2], Text);
      assert.equal(parent.childNodes[2].textContent, remainderPost);
    });

    test('_annotateElement design doc example', () => {
      const layers = [
        'amet, ',
        'inceptos ',
        'amet, ',
        'et, suspendisse ince',
      ];

      // Apply the layers successively.
      layers.forEach((layer, i) => {
        GrAnnotation.annotateElement(
            parent, str.indexOf(layer), layer.length, `layer-${i + 1}`);
      });

      assert.equal(parent.textContent, str);

      // Layer 1:
      const layer1 = parent.querySelectorAll('.layer-1');
      assert.equal(layer1.length, 1);
      assert.equal(layer1[0].textContent, layers[0]);
      assert.equal(layer1[0].parentElement, parent);

      // Layer 2:
      const layer2 = parent.querySelectorAll('.layer-2');
      assert.equal(layer2.length, 1);
      assert.equal(layer2[0].textContent, layers[1]);
      assert.equal(layer2[0].parentElement, parent);

      // Layer 3:
      const layer3 = parent.querySelectorAll('.layer-3');
      assert.equal(layer3.length, 1);
      assert.equal(layer3[0].textContent, layers[2]);
      assert.equal(layer3[0].parentElement, layer1[0]);

      // Layer 4:
      const layer4 = parent.querySelectorAll('.layer-4');
      assert.equal(layer4.length, 3);

      assert.equal(layer4[0].textContent, 'et, ');
      assert.equal(layer4[0].parentElement, layer3[0]);

      assert.equal(layer4[1].textContent, 'suspendisse ');
      assert.equal(layer4[1].parentElement, parent);

      assert.equal(layer4[2].textContent, 'ince');
      assert.equal(layer4[2].parentElement, layer2[0]);

      assert.equal(layer4[0].textContent +
          layer4[1].textContent +
          layer4[2].textContent,
          layers[3]);
    });

    test('splitTextNode', () => {
      const helloString = 'hello';
      const asciiString = 'ASCII';
      const unicodeString = 'Unic💢de';

      let node;
      let tail;

      // Non-unicode path:
      node = document.createTextNode(helloString + asciiString);
      tail = GrAnnotation.splitTextNode(node, helloString.length);
      assert(node.textContent, helloString);
      assert(tail.textContent, asciiString);

      // Unicdoe path:
      node = document.createTextNode(helloString + unicodeString);
      tail = GrAnnotation.splitTextNode(node, helloString.length);
      assert(node.textContent, helloString);
      assert(tail.textContent, unicodeString);
    });
  });
</script>