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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="/test/common-test-setup.js"></script>
<script src="/bower_components/webcomponentsjs/custom-elements-es5-adapter.js"></script>

<script src="/bower_components/web-component-tester/browser.js"></script>
<link rel="import" href="../../../test/common-test-setup.html"/>
<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, 0, 128);
      const l2 = new GrDiffLine(GrDiffLine.Type.ADD, 0, 129);
      const l3 = new GrDiffLine(GrDiffLine.Type.REMOVE, 64, 0);
      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, 64, 128);
      const l2 = new GrDiffLine(GrDiffLine.Type.BOTH, 65, 129);
      const l3 = new GrDiffLine(GrDiffLine.Type.BOTH, 66, 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));
    });

    suite('hideInContextControl', () => {
      let groups;
      setup(() => {
        groups = [
          new GrDiffGroup(GrDiffGroup.Type.BOTH, [
            new GrDiffLine(GrDiffLine.Type.BOTH, 5, 7),
            new GrDiffLine(GrDiffLine.Type.BOTH, 6, 8),
            new GrDiffLine(GrDiffLine.Type.BOTH, 7, 9),
          ]),
          new GrDiffGroup(GrDiffGroup.Type.DELTA, [
            new GrDiffLine(GrDiffLine.Type.REMOVE, 8),
            new GrDiffLine(GrDiffLine.Type.ADD, 0, 10),
            new GrDiffLine(GrDiffLine.Type.REMOVE, 9),
            new GrDiffLine(GrDiffLine.Type.ADD, 0, 11),
            new GrDiffLine(GrDiffLine.Type.REMOVE, 10),
            new GrDiffLine(GrDiffLine.Type.ADD, 0, 12),
          ]),
          new GrDiffGroup(GrDiffGroup.Type.BOTH, [
            new GrDiffLine(GrDiffLine.Type.BOTH, 11, 13),
            new GrDiffLine(GrDiffLine.Type.BOTH, 12, 14),
            new GrDiffLine(GrDiffLine.Type.BOTH, 13, 15),
          ]),
        ];
      });

      test('hides hidden groups in context control', () => {
        const collapsedGroups = GrDiffGroup.hideInContextControl(groups, 3, 6);
        assert.equal(collapsedGroups.length, 3);

        assert.equal(collapsedGroups[0], groups[0]);

        assert.equal(collapsedGroups[1].type, GrDiffGroup.Type.CONTEXT_CONTROL);
        assert.equal(collapsedGroups[1].lines.length, 1);
        assert.equal(
            collapsedGroups[1].lines[0].type, GrDiffLine.Type.CONTEXT_CONTROL);
        assert.equal(
            collapsedGroups[1].lines[0].contextGroups.length, 1);
        assert.equal(
            collapsedGroups[1].lines[0].contextGroups[0], groups[1]);

        assert.equal(collapsedGroups[2], groups[2]);
      });

      test('splits partially hidden groups', () => {
        const collapsedGroups = GrDiffGroup.hideInContextControl(groups, 4, 7);
        assert.equal(collapsedGroups.length, 4);
        assert.equal(collapsedGroups[0], groups[0]);

        assert.equal(collapsedGroups[1].type, GrDiffGroup.Type.DELTA);
        assert.deepEqual(collapsedGroups[1].adds, [groups[1].adds[0]]);
        assert.deepEqual(collapsedGroups[1].removes, [groups[1].removes[0]]);

        assert.equal(collapsedGroups[2].type, GrDiffGroup.Type.CONTEXT_CONTROL);
        assert.equal(collapsedGroups[2].lines.length, 1);
        assert.equal(
            collapsedGroups[2].lines[0].type, GrDiffLine.Type.CONTEXT_CONTROL);
        assert.equal(
            collapsedGroups[2].lines[0].contextGroups.length, 2);

        assert.equal(
            collapsedGroups[2].lines[0].contextGroups[0].type,
            GrDiffGroup.Type.DELTA);
        assert.deepEqual(
            collapsedGroups[2].lines[0].contextGroups[0].adds,
            groups[1].adds.slice(1));
        assert.deepEqual(
            collapsedGroups[2].lines[0].contextGroups[0].removes,
            groups[1].removes.slice(1));

        assert.equal(
            collapsedGroups[2].lines[0].contextGroups[1].type,
            GrDiffGroup.Type.BOTH);
        assert.deepEqual(
            collapsedGroups[2].lines[0].contextGroups[1].lines,
            [groups[2].lines[0]]);

        assert.equal(collapsedGroups[3].type, GrDiffGroup.Type.BOTH);
        assert.deepEqual(collapsedGroups[3].lines, groups[2].lines.slice(1));
      });

      test('groups unchanged if the hidden range is empty', () => {
        assert.deepEqual(
            GrDiffGroup.hideInContextControl(groups, 0, 0), groups);
      });

      test('groups unchanged if there is only 1 line to hide', () => {
        assert.deepEqual(
            GrDiffGroup.hideInContextControl(groups, 3, 4), groups);
      });
    });
  });

</script>