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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-group</title>

<script src="../../../bower_components/web-component-tester/browser.js"></script>
<script src="gr-diff-line.js"></script>
<script src="gr-diff-group.js"></script>

<script>
  suite('gr-diff-group tests', () => {
    test('delta line pairs', () => {
      let group = new GrDiffGroup(GrDiffGroup.Type.DELTA);
      const l1 = new GrDiffLine(GrDiffLine.Type.ADD);
      const l2 = new GrDiffLine(GrDiffLine.Type.ADD);
      const l3 = new GrDiffLine(GrDiffLine.Type.REMOVE);
      l1.afterNumber = 128;
      l2.afterNumber = 129;
      l3.beforeNumber = 64;
      group.addLine(l1);
      group.addLine(l2);
      group.addLine(l3);
      assert.deepEqual(group.lines, [l1, l2, l3]);
      assert.deepEqual(group.adds, [l1, l2]);
      assert.deepEqual(group.removes, [l3]);
      assert.deepEqual(group.lineRange, {
        left: {start: 64, end: 64},
        right: {start: 128, end: 129},
      });

      let pairs = group.getSideBySidePairs();
      assert.deepEqual(pairs, [
        {left: l3, right: l1},
        {left: GrDiffLine.BLANK_LINE, right: l2},
      ]);

      group = new GrDiffGroup(GrDiffGroup.Type.DELTA, [l1, l2, l3]);
      assert.deepEqual(group.lines, [l1, l2, l3]);
      assert.deepEqual(group.adds, [l1, l2]);
      assert.deepEqual(group.removes, [l3]);

      pairs = group.getSideBySidePairs();
      assert.deepEqual(pairs, [
        {left: l3, right: l1},
        {left: GrDiffLine.BLANK_LINE, right: l2},
      ]);
    });

    test('group/header line pairs', () => {
      const l1 = new GrDiffLine(GrDiffLine.Type.BOTH);
      l1.beforeNumber = 64;
      l1.afterNumber = 128;

      const l2 = new GrDiffLine(GrDiffLine.Type.BOTH);
      l2.beforeNumber = 65;
      l2.afterNumber = 129;

      const l3 = new GrDiffLine(GrDiffLine.Type.BOTH);
      l3.beforeNumber = 66;
      l3.afterNumber = 130;

      let group = new GrDiffGroup(GrDiffGroup.Type.BOTH, [l1, l2, l3]);

      assert.deepEqual(group.lines, [l1, l2, l3]);
      assert.deepEqual(group.adds, []);
      assert.deepEqual(group.removes, []);

      assert.deepEqual(group.lineRange, {
        left: {start: 64, end: 66},
        right: {start: 128, end: 130},
      });

      let pairs = group.getSideBySidePairs();
      assert.deepEqual(pairs, [
        {left: l1, right: l1},
        {left: l2, right: l2},
        {left: l3, right: l3},
      ]);

      group = new GrDiffGroup(GrDiffGroup.Type.CONTEXT_CONTROL, [l1, l2, l3]);
      assert.deepEqual(group.lines, [l1, l2, l3]);
      assert.deepEqual(group.adds, []);
      assert.deepEqual(group.removes, []);

      pairs = group.getSideBySidePairs();
      assert.deepEqual(pairs, [
        {left: l1, right: l1},
        {left: l2, right: l2},
        {left: l3, right: l3},
      ]);
    });

    test('adding delta lines to non-delta group', () => {
      const l1 = new GrDiffLine(GrDiffLine.Type.ADD);
      const l2 = new GrDiffLine(GrDiffLine.Type.REMOVE);
      const l3 = new GrDiffLine(GrDiffLine.Type.BOTH);

      let group = new GrDiffGroup(GrDiffGroup.Type.BOTH);
      assert.throws(group.addLine.bind(group, l1));
      assert.throws(group.addLine.bind(group, l2));
      assert.doesNotThrow(group.addLine.bind(group, l3));

      group = new GrDiffGroup(GrDiffGroup.Type.CONTEXT_CONTROL);
      assert.throws(group.addLine.bind(group, l1));
      assert.throws(group.addLine.bind(group, l2));
      assert.doesNotThrow(group.addLine.bind(group, l3));
    });
  });

</script>