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

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

<link rel="import" href="../../shared/gr-rest-api-interface/mock-diff-response_test.html">
<link rel="import" href="../../../bower_components/iron-test-helpers/iron-test-helpers.html">
<link rel="import" href="gr-file-list.html">

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

<test-fixture id="basic">
  <template>
    <gr-file-list></gr-file-list>
  </template>
</test-fixture>

<test-fixture id="blank">
  <template>
    <div></div>
  </template>
</test-fixture>

<script>
  suite('gr-file-list tests', function() {
    var element;
    var sandbox;
    var saveStub;

    setup(function() {
      sandbox = sinon.sandbox.create();
      stub('gr-rest-api-interface', {
        getLoggedIn: function() { return Promise.resolve(true); },
        getPreferences: function() { return Promise.resolve({}); },
        fetchJSON: function() { return Promise.resolve({}); },
      });
      stub('gr-date-formatter', {
        _loadTimeFormat: function() { return Promise.resolve(''); },
      });
      stub('gr-diff', {
        reload: function() { return Promise.resolve(); },
      });
      element = fixture('basic');
      element.numFilesShown = 200;
      saveStub = sandbox.stub(element, '_saveReviewedState',
          function() { return Promise.resolve(); });
    });

    teardown(function() {
      sandbox.restore();
    });

    test('correct number of files are shown', function() {
      element._files = _.times(500, function(i) {
          return {__path: '/file' + i, lines_inserted: 9}; });
      flushAsynchronousOperations();
      assert.equal(
          Polymer.dom(element.root).querySelectorAll('.file-row').length,
          element.numFilesShown);
    });

    test('get file list', function(done) {
      var getChangeFilesStub = sandbox.stub(element.$.restAPI, 'getChangeFiles',
          function() {
            return Promise.resolve({
              '/COMMIT_MSG': {lines_inserted: 9},
              'tags.html': {lines_deleted: 123},
              'about.txt': {},
            });
          });

      element._getFiles().then(function(files) {
        var filenames = files.map(function(f) { return f.__path; });
        assert.deepEqual(filenames, ['/COMMIT_MSG', 'about.txt', 'tags.html']);
        assert.deepEqual(files[0], {
          lines_inserted: 9,
          lines_deleted: 0,
          __path: '/COMMIT_MSG',
        });
        assert.deepEqual(files[1], {
          lines_inserted: 0,
          lines_deleted: 0,
          __path: 'about.txt',
        });
        assert.deepEqual(files[2], {
          lines_inserted: 0,
          lines_deleted: 123,
          __path: 'tags.html',
        });

        getChangeFilesStub.restore();
        done();
      });
    });

    test('calculate totals for patch number', function() {
      element._files = [
        {__path: '/COMMIT_MSG', lines_inserted: 9},
        {
          __path: 'file_added_in_rev2.txt',
          lines_inserted: 1,
          lines_deleted: 1,
          size_delta: 10,
          size: 100,
        },
        {
          __path: 'myfile.txt',
          lines_inserted: 1,
          lines_deleted: 1,
          size_delta: 10,
          size: 100,
        },
      ];
      assert.deepEqual(element._patchChange, {
        inserted: 2,
        deleted: 2,
        size_delta_inserted: 0,
        size_delta_deleted: 0,
        total_size: 0,
      });
      assert.isTrue(element._hideBinaryChangeTotals);
      assert.isFalse(element._hideChangeTotals);

      // Test with a commit message that isn't the first file.
      element._files = [
        {__path: 'file_added_in_rev2.txt', lines_inserted: 1, lines_deleted: 1},
        {__path: '/COMMIT_MSG', lines_inserted: 9},
        {__path: 'myfile.txt', lines_inserted: 1, lines_deleted: 1},
      ];
      assert.deepEqual(element._patchChange, {
        inserted: 2,
        deleted: 2,
        size_delta_inserted: 0,
        size_delta_deleted: 0,
        total_size: 0,
      });
      assert.isTrue(element._hideBinaryChangeTotals);
      assert.isFalse(element._hideChangeTotals);

      // Test with no commit message.
      element._files = [
        {__path: 'file_added_in_rev2.txt', lines_inserted: 1, lines_deleted: 1},
        {__path: 'myfile.txt', lines_inserted: 1, lines_deleted: 1},
      ];
      assert.deepEqual(element._patchChange, {
        inserted: 2,
        deleted: 2,
        size_delta_inserted: 0,
        size_delta_deleted: 0,
        total_size: 0,
      });
      assert.isTrue(element._hideBinaryChangeTotals);
      assert.isFalse(element._hideChangeTotals);

      // Test with files missing either lines_inserted or lines_deleted.
      element._files = [
        {__path: 'file_added_in_rev2.txt', lines_inserted: 1},
        {__path: 'myfile.txt', lines_deleted: 1},
      ];
      assert.deepEqual(element._patchChange, {
        inserted: 1,
        deleted: 1,
        size_delta_inserted: 0,
        size_delta_deleted: 0,
        total_size: 0,
      });
      assert.isTrue(element._hideBinaryChangeTotals);
      assert.isFalse(element._hideChangeTotals);
    });

    test('binary only files', function() {
      element._files = [
        {__path: '/COMMIT_MSG', lines_inserted: 9},
        {__path: 'file_binary', binary: true, size_delta: 10, size: 100},
        {__path: 'file_binary', binary: true, size_delta: -5, size: 120},
      ];
      assert.deepEqual(element._patchChange, {
        inserted: 0,
        deleted: 0,
        size_delta_inserted: 10,
        size_delta_deleted: -5,
        total_size: 220,
      });
      assert.isFalse(element._hideBinaryChangeTotals);
      assert.isTrue(element._hideChangeTotals);
    });

    test('binary and regular files', function() {
      element._files = [
        {__path: '/COMMIT_MSG', lines_inserted: 9},
        {__path: 'file_binary', binary: true, size_delta: 10, size: 100},
        {__path: 'file_binary', binary: true, size_delta: -5, size: 120},
        {__path: 'myfile.txt', lines_deleted: 5, size_delta: -10, size: 100},
        {__path: 'myfile2.txt', lines_inserted: 10},
      ];
      assert.deepEqual(element._patchChange, {
        inserted: 10,
        deleted: 5,
        size_delta_inserted: 10,
        size_delta_deleted: -5,
        total_size: 220,
      });
      assert.isFalse(element._hideBinaryChangeTotals);
      assert.isFalse(element._hideChangeTotals);
    });

    test('_formatBytes function', function() {
      var table = {
        64: '+64 B',
        1023: '+1023 B',
        1024: '+1 KiB',
        4096: '+4 KiB',
        1073741824: '+1 GiB',
        '-64': '-64 B',
        '-1023': '-1023 B',
        '-1024': '-1 KiB',
        '-4096': '-4 KiB',
        '-1073741824': '-1 GiB',
        0: '+/-0 B',
      };

      for (var bytes in table) {
        if (table.hasOwnProperty(bytes)) {
          assert.equal(element._formatBytes(bytes), table[bytes]);
        }
      }
    });

    test('_formatPercentage function', function() {
      var table = [
        { size: 100,
          delta: 100,
          display: '',
        },
        { size: 195060,
          delta: 64,
          display: '(+0%)',
        },
        { size: 195060,
          delta: -64,
          display: '(-0%)',
        },
        { size: 394892,
          delta: -7128,
          display: '(-2%)',
        },
        { size: 90,
          delta: -10,
          display: '(-10%)',
        },
        { size: 110,
          delta: 10,
          display: '(+10%)',
        },
      ];

      table.forEach(function(item) {
        assert.equal(element._formatPercentage(
            item.size, item.delta), item.display);
      });
    });

    suite('keyboard shortcuts', function() {
      setup(function() {
        element._files = [
          {__path: '/COMMIT_MSG'},
          {__path: 'file_added_in_rev2.txt'},
          {__path: 'myfile.txt'},
        ];
        element.changeNum = '42';
        element.patchRange = {
          basePatchNum: 'PARENT',
          patchNum: '2',
        };
        element.$.fileCursor.setCursorAtIndex(0);
      });

      test('toggle left diff via shortcut', function() {
        var toggleLeftDiffStub = sandbox.stub();
        // Property getter cannot be stubbed w/ sandbox due to a bug in Sinon.
        // https://github.com/sinonjs/sinon/issues/781
        var diffsStub = sinon.stub(element, 'diffs', {
          get: function() {
            return [{toggleLeftDiff: toggleLeftDiffStub}];
          },
        });
        MockInteractions.pressAndReleaseKeyOn(element, 65, 'shift', 'a');
        assert.isTrue(toggleLeftDiffStub.calledOnce);
        diffsStub.restore();
      });

      test('keyboard shortcuts', function() {
        flushAsynchronousOperations();

        var items = Polymer.dom(element.root).querySelectorAll('.file-row');
        element.$.fileCursor.stops = items;
        element.$.fileCursor.setCursorAtIndex(0);
        assert.equal(items.length, 3);
        assert.isTrue(items[0].classList.contains('selected'));
        assert.isFalse(items[1].classList.contains('selected'));
        assert.isFalse(items[2].classList.contains('selected'));
        // j with a modifier should not move the cursor.
        MockInteractions.pressAndReleaseKeyOn(element, 74, 'shift', 'j');
        assert.equal(element.$.fileCursor.index, 0);
        MockInteractions.pressAndReleaseKeyOn(element, 74, null, 'j');
        assert.equal(element.$.fileCursor.index, 1);
        assert.equal(element.selectedIndex, 1);
        MockInteractions.pressAndReleaseKeyOn(element, 74, null, 'j');

        var showStub = sandbox.stub(page, 'show');
        assert.equal(element.$.fileCursor.index, 2);
        assert.equal(element.selectedIndex, 2);
        MockInteractions.pressAndReleaseKeyOn(element, 13, null, 'enter');
        assert(showStub.lastCall.calledWith('/c/42/2/myfile.txt'),
            'Should navigate to /c/42/2/myfile.txt');
        // k with a modifier should not move the cursor.
        MockInteractions.pressAndReleaseKeyOn(element, 75, 'shift', 'k');
        assert.equal(element.$.fileCursor.index, 2);

        MockInteractions.pressAndReleaseKeyOn(element, 75, null, 'k');
        assert.equal(element.$.fileCursor.index, 1);
        assert.equal(element.selectedIndex, 1);
        MockInteractions.pressAndReleaseKeyOn(element, 79, null, 'o');
        assert(showStub.lastCall.calledWith('/c/42/2/file_added_in_rev2.txt'),
            'Should navigate to /c/42/2/file_added_in_rev2.txt');

        MockInteractions.pressAndReleaseKeyOn(element, 75, null, 'k');
        MockInteractions.pressAndReleaseKeyOn(element, 75, null, 'k');
        MockInteractions.pressAndReleaseKeyOn(element, 75, null, 'k');
        assert.equal(element.$.fileCursor.index, 0);
        assert.equal(element.selectedIndex, 0);
      });

      test('i key shows/hides selected inline diff', function() {
        sandbox.stub(element, '_expandedPathsChanged');
        flushAsynchronousOperations();
        var files = Polymer.dom(element.root).querySelectorAll('.file-row');
        element.$.fileCursor.stops = files;
        element.$.fileCursor.setCursorAtIndex(0);
        MockInteractions.pressAndReleaseKeyOn(element, 73, null, 'i');
        flushAsynchronousOperations();
        assert.include(element._expandedFilePaths, element.diffs[0].path);
        MockInteractions.pressAndReleaseKeyOn(element, 73, null, 'i');
        flushAsynchronousOperations();
        assert.notInclude(element._expandedFilePaths, element.diffs[0].path);
        element.$.fileCursor.setCursorAtIndex(1);
        MockInteractions.pressAndReleaseKeyOn(element, 73, null, 'i');
        flushAsynchronousOperations();
        assert.include(element._expandedFilePaths, element.diffs[1].path);

        MockInteractions.pressAndReleaseKeyOn(element, 73, 'shift', 'i');
        flushAsynchronousOperations();
        for (var index in element.diffs) {
          assert.include(element._expandedFilePaths, element.diffs[index].path);
        }
        MockInteractions.pressAndReleaseKeyOn(element, 73, 'shift', 'i');
        flushAsynchronousOperations();
        for (var index in element.diffs) {
          assert.notInclude(element._expandedFilePaths,
              element.diffs[index].path);
        }
      });

      test('_handleEnterKey navigates', function() {
        sandbox.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
        sandbox.stub(element, 'modifierPressed').returns(false);
        var expandStub = sandbox.stub(element, '_openCursorFile');
        var navStub = sandbox.stub(element, '_openSelectedFile');
        var e = new CustomEvent('fake-keyboard-event');
        sinon.stub(e, 'preventDefault');
        element._showInlineDiffs = false;
        element._handleEnterKey(e);
        assert.isTrue(e.preventDefault.called);
        assert.isTrue(navStub.called);
        assert.isFalse(expandStub.called);
      });

      test('_handleEnterKey expands', function() {
        sandbox.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
        sandbox.stub(element, 'modifierPressed').returns(false);
        var expandStub = sandbox.stub(element, '_openCursorFile');
        var navStub = sandbox.stub(element, '_openSelectedFile');
        var e = new CustomEvent('fake-keyboard-event');
        sinon.stub(e, 'preventDefault');
        element._showInlineDiffs = true;
        element._handleEnterKey(e);
        assert.isTrue(e.preventDefault.called);
        assert.isFalse(navStub.called);
        assert.isTrue(expandStub.called);
      });

      test('_handleEnterKey noop when anchor focused', function() {
        sandbox.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
        sandbox.stub(element, 'modifierPressed').returns(false);
        var e = new CustomEvent('fake-keyboard-event',
            {detail: {keyboardEvent: {target: document.createElement('a')}}});
        sinon.stub(e, 'preventDefault');
        element._handleEnterKey(e);
        assert.isFalse(e.preventDefault.called);
      });
    });

    test('comment filtering', function() {
      var comments = {
        '/COMMIT_MSG': [
          {patch_set: 1, message: 'Done', updated: '2017-02-08 16:40:49'},
          {patch_set: 1, message: 'oh hay', updated: '2017-02-09 16:40:49'},
          {patch_set: 2, message: 'hello', updated: '2017-02-10 16:40:49'},
        ],
        'myfile.txt': [
          {patch_set: 1, message: 'good news!', updated: '2017-02-08 16:40:49'},
          {patch_set: 2, message: 'wat!?', updated: '2017-02-09 16:40:49'},
          {patch_set: 2, message: 'hi', updated: '2017-02-10 16:40:49'},
        ],
        'unresolved.file': [
          {
            patch_set: 2,
            message: 'wat!?',
            updated: '2017-02-09 16:40:49',
            id: '1',
            unresolved: true,
          },
          {
            patch_set: 2,
            message: 'hi',
            updated: '2017-02-10 16:40:49',
            id: '2',
            in_reply_to: '1',
            unresolved: false,
          },
          {
            patch_set: 2,
            message: 'good news!',
            updated: '2017-02-08 16:40:49',
            id: '3',
            unresolved: true,
          },
        ],
      };
      var drafts = {
        'unresolved.file': [
          {
            patch_set: 2,
            message: 'hi',
            updated: '2017-02-11 16:40:49',
            id: '4',
            in_reply_to: '3',
            unresolved: false,
          },
        ],
      };
      assert.equal(
          element._computeCountString(comments, '1', '/COMMIT_MSG', 'comment'),
          '2 comments');
      assert.equal(
          element._computeCommentsStringMobile(comments, '1', '/COMMIT_MSG'),
          '2c');
      assert.equal(
          element._computeDraftsStringMobile(comments, '1', '/COMMIT_MSG'),
          '2d');
      assert.equal(
          element._computeCountString(comments, '1', 'myfile.txt', 'comment'),
          '1 comment');
      assert.equal(
          element._computeCommentsStringMobile(comments, '1', 'myfile.txt'),
          '1c');
      assert.equal(
          element._computeDraftsStringMobile(comments, '1', 'myfile.txt'),
          '1d');
      assert.equal(
          element._computeCountString(comments, '1',
          'file_added_in_rev2.txt', 'comment'), '');
      assert.equal(
          element._computeCommentsStringMobile(comments, '1',
          'file_added_in_rev2.txt'), '');
      assert.equal(
          element._computeDraftsStringMobile(comments, '1',
          'file_added_in_rev2.txt'), '');
      assert.equal(
          element._computeCountString(comments, '2', '/COMMIT_MSG', 'comment'),
          '1 comment');
      assert.equal(
          element._computeCommentsStringMobile(comments, '2', '/COMMIT_MSG'),
          '1c');
      assert.equal(
          element._computeDraftsStringMobile(comments, '2', '/COMMIT_MSG'),
          '1d');
      assert.equal(
          element._computeCountString(comments, '2', 'myfile.txt', 'comment'),
          '2 comments');
      assert.equal(
          element._computeCommentsStringMobile(comments, '2', 'myfile.txt'),
          '2c');
      assert.equal(
          element._computeDraftsStringMobile(comments, '2', 'myfile.txt'),
          '2d');
      assert.equal(
          element._computeCountString(comments, '2',
          'file_added_in_rev2.txt', 'comment'), '');
      assert.equal(element._computeCountString(comments, '2',
          'unresolved.file', 'comment'), '3 comments');
      assert.equal(
          element._computeUnresolvedString(comments, [], 2, 'myfile.txt'), '');
      assert.equal(
          element._computeUnresolvedString(comments, [], 2, 'unresolved.file'),
          '(1 unresolved)');
      assert.equal(
          element._computeUnresolvedString(comments, drafts, 2,
          'unresolved.file'), '');
    });

    test('computed properties', function() {
      assert.equal(element._computeFileStatus('A'), 'A');
      assert.equal(element._computeFileStatus(undefined), 'M');
      assert.equal(element._computeFileStatus(null), 'M');

      assert.equal(element._computeFileDisplayName('/foo/bar/baz'),
          '/foo/bar/baz');
      assert.equal(element._computeFileDisplayName('/COMMIT_MSG'),
          'Commit message');

      assert.equal(element._computeClass('clazz', '/foo/bar/baz'), 'clazz');
      assert.equal(element._computeClass('clazz', '/COMMIT_MSG'),
          'clazz invisible');
      assert.equal(element._computeExpandInlineClass(
          {expand_inline_diffs: true}), 'expandInline');
      assert.equal(element._computeExpandInlineClass(
        {expand_inline_diffs: false}), '');
    });

    test('file review status', function() {
      element._files = [
        {__path: '/COMMIT_MSG'},
        {__path: 'file_added_in_rev2.txt'},
        {__path: 'myfile.txt'},
      ];
      element._reviewed = ['/COMMIT_MSG', 'myfile.txt'];
      element._loggedIn = true;
      element.changeNum = '42';
      element.patchRange = {
        basePatchNum: 'PARENT',
        patchNum: '2',
      };
      element.$.fileCursor.setCursorAtIndex(0);

      flushAsynchronousOperations();
      var fileRows =
          Polymer.dom(element.root).querySelectorAll('.row:not(.header)');
      var commitMsg = fileRows[0].querySelector(
          'input.reviewed[type="checkbox"]');
      var fileAdded = fileRows[1].querySelector(
          'input.reviewed[type="checkbox"]');
      var myFile = fileRows[2].querySelector(
          'input.reviewed[type="checkbox"]');

      assert.isTrue(commitMsg.checked);
      assert.isFalse(fileAdded.checked);
      assert.isTrue(myFile.checked);

      MockInteractions.tap(commitMsg);
      assert.isTrue(saveStub.lastCall.calledWithExactly('/COMMIT_MSG', false));
      MockInteractions.tap(commitMsg);
      assert.isTrue(saveStub.lastCall.calledWithExactly('/COMMIT_MSG', true));
    });

    test('patch set from revisions', function() {
      var expected = [
        {num: 1, desc: 'test'},
        {num: 2, desc: 'test'},
        {num: 3, desc: 'test'},
        {num: 4, desc: 'test'},
      ];
      var patchNums = element._computePatchSets({
        base: {
          rev3: {_number: 3, description: 'test'},
          rev1: {_number: 1, description: 'test'},
          rev4: {_number: 4, description: 'test'},
          rev2: {_number: 2, description: 'test'},
        },
      });
      assert.equal(patchNums.length, expected.length);
      for (var i = 0; i < expected.length; i++) {
        assert.deepEqual(patchNums[i], expected[i]);
      }
    });

    test('patch range string', function() {
      assert.equal(
          element._patchRangeStr({basePatchNum: 'PARENT', patchNum: '1'}),
          '1');
      assert.equal(
          element._patchRangeStr({basePatchNum: '1', patchNum: '3'}),
          '1..3');
    });

    test('diff against dropdown', function(done) {
      var showStub = sandbox.stub(page, 'show');
      element.changeNum = '42';
      element.patchRange = {
        basePatchNum: 'PARENT',
        patchNum: '3',
      };
      element.revisions = {
        rev1: {_number: 1},
        rev2: {_number: 2},
        rev3: {_number: 3},
      };
      flush(function() {
        var selectEl = element.$.patchChange;
        assert.equal(selectEl.value, 'PARENT');
        assert.isTrue(element.$$('option[value="3"]').hasAttribute('disabled'));
        selectEl.addEventListener('change', function() {
          assert.equal(selectEl.value, '2');
          assert(showStub.lastCall.calledWithExactly('/c/42/2..3'),
              'Should navigate to /c/42/2..3');
          showStub.restore();
          done();
        });
        selectEl.value = '2';
        element.fire('change', {}, {node: selectEl});
      });
    });

    test('checkbox shows/hides diff inline', function() {
      element._files = [
        {__path: 'myfile.txt'},
      ];
      element.changeNum = '42';
      element.patchRange = {
        basePatchNum: 'PARENT',
        patchNum: '2',
      };
      element.$.fileCursor.setCursorAtIndex(0);
      sandbox.stub(element, '_expandedPathsChanged');
      flushAsynchronousOperations();
      var fileRows =
          Polymer.dom(element.root).querySelectorAll('.row:not(.header)');
      // Because the label surrounds the input, the tap event is triggered
      // there first.
      var showHideLabel = fileRows[0].querySelector('label.show-hide');
      var showHideCheck = fileRows[0].querySelector(
          'input.show-hide[type="checkbox"]');
      assert.isNotOk(showHideCheck.checked);
      MockInteractions.tap(showHideLabel);
      assert.isOk(showHideCheck.checked);
      assert.notEqual(element._expandedFilePaths.indexOf('myfile.txt'), -1);
    });

    test('path should be properly escaped', function() {
      element._files = [
        {__path: 'foo bar/my+file.txt%'},
      ];
      element.changeNum = '42';
      element.patchRange = {
        basePatchNum: 'PARENT',
        patchNum: '2',
      };
      flushAsynchronousOperations();
      // Slashes should be preserved, and spaces should be translated to `+`.
      // @see Issue 4255 regarding double-encoding.
      // @see Issue 4577 regarding more readable URLs.
      assert.equal(
          element.$$('a').getAttribute('href'),
          '/c/42/2/foo+bar/my%252Bfile.txt%2525');
    });

    test('diff mode correctly toggles the diffs', function() {
      element._files = [
        {__path: 'myfile.txt'},
      ];
      element.changeNum = '42';
      element.patchRange = {
        basePatchNum: 'PARENT',
        patchNum: '2',
      };
      element.$.fileCursor.setCursorAtIndex(0);
      flushAsynchronousOperations();

      // Tap on a file to generate the diff.
      var row = Polymer.dom(element.root)
          .querySelectorAll('.row:not(.header) label.show-hide')[0];

      MockInteractions.tap(row);
      flushAsynchronousOperations();
      var diffDisplay = element.diffs[0];
      element._userPrefs = {default_diff_view: 'SIDE_BY_SIDE'};
      assert.equal(element.diffViewMode, 'SIDE_BY_SIDE');
      assert.equal(diffDisplay.viewMode, 'SIDE_BY_SIDE');
      element.set('diffViewMode', 'UNIFIED_DIFF');
      assert.equal(diffDisplay.viewMode, 'UNIFIED_DIFF');
    });

    test('diff mode selector initializes from preferences', function() {
      var resolvePrefs;
      var prefsPromise = new Promise(function(resolve) {
        resolvePrefs = resolve;
      });
      sandbox.stub(element, '_getPreferences').returns(prefsPromise);

      // Attach a new gr-file-list so we can intercept the preferences fetch.
      var view = document.createElement('gr-file-list');
      var select = view.$.modeSelect;
      fixture('blank').appendChild(view);
      flushAsynchronousOperations();

      // At this point the diff mode doesn't yet have the user's preference.
      assert.equal(select.value, 'SIDE_BY_SIDE');

      // Receive the overriding preference.
      resolvePrefs({default_diff_view: 'UNIFIED'});
      flushAsynchronousOperations();
      assert.equal(select.value, 'SIDE_BY_SIDE');
      document.getElementById('blank').restore();
    });

    test('show/hide diffs disabled for large amounts of files', function(done) {
      var computeSpy = sandbox.spy(element, '_fileListActionsVisible');
      element._files = [];
      element.changeNum = '42';
      element.patchRange = {
        basePatchNum: 'PARENT',
        patchNum: '2',
      };
      element.$.fileCursor.setCursorAtIndex(0);
      flush(function() {
        assert.isTrue(computeSpy.lastCall.returnValue);
        var arr = [];
        _.times(element._maxFilesForBulkActions + 1, function() {
          arr.push({__path: 'myfile.txt'});
        });
        element._files = arr;
        element.numFilesShown = arr.length;
        assert.isFalse(computeSpy.lastCall.returnValue);
        done();
      });
    });

    test('expanded attribute not set on path when not expanded', function() {
      element._files = [
        {__path: '/COMMIT_MSG'},
      ];
      assert.isNotOk(element.$$('.expanded'));
    });

    test('_getDiffViewMode', function() {
      // No user prefs or diff view mode set.
      assert.equal(element._getDiffViewMode(), 'SIDE_BY_SIDE');
      // User prefs but no diff view mode set.
      element.diffViewMode = null;
      element._userPrefs = {default_diff_view: 'UNIFIED_DIFF'};
      assert.equal(
          element._getDiffViewMode(null, element._userPrefs), 'UNIFIED_DIFF');
      // User prefs and diff view mode set.
      element.diffViewMode = 'SIDE_BY_SIDE';
      assert.equal(element._getDiffViewMode(
          element.diffViewMode, element._userPrefs), 'SIDE_BY_SIDE');
    });
    test('expand_inline_diffs user preference', function() {
      element._files = [
        {__path: '/COMMIT_MSG'},
      ];
      element.changeNum = '42';
      element.patchRange = {
        basePatchNum: 'PARENT',
        patchNum: '2',
      };
      sandbox.stub(element, '_expandedPathsChanged');
      flushAsynchronousOperations();
      var commitMsgFile = Polymer.dom(element.root)
          .querySelectorAll('.row:not(.header) a')[0];

      // Remove href attribute so the app doesn't route to a diff view
      commitMsgFile.removeAttribute('href');
      var togglePathSpy = sandbox.spy(element, '_togglePathExpanded');

      MockInteractions.tap(commitMsgFile);
      flushAsynchronousOperations();
      assert(togglePathSpy.notCalled, 'file is opened as diff view');
      assert.isNotOk(element.$$('.expanded'));

      element._userPrefs = {expand_inline_diffs: true};
      flushAsynchronousOperations();
      MockInteractions.tap(commitMsgFile);
      flushAsynchronousOperations();
      assert(togglePathSpy.calledOnce, 'file is expanded');
      assert.isOk(element.$$('.expanded'));
    });

    test('_togglePathExpanded', function() {
      var path = 'path/to/my/file.txt';
      element.files = [{__path: path}];
      var renderStub = sandbox.stub(element, '_renderInOrder')
          .returns(Promise.resolve());

      assert.equal(element._expandedFilePaths.length, 0);
      element._togglePathExpanded(path);
      flushAsynchronousOperations();

      assert.equal(renderStub.callCount, 1);
      assert.include(element._expandedFilePaths, path);
      element._togglePathExpanded(path);
      flushAsynchronousOperations();

      assert.equal(renderStub.callCount, 2);
      assert.notInclude(element._expandedFilePaths, path);
    });

    test('_expandedPathsChanged', function(done) {
      sandbox.stub(element, '_reviewFile');
      var path = 'path/to/my/file.txt';
      var diffs = [{
        path: path,
        reload: function() {
          done();
        },
      }];
      var diffsStub = sinon.stub(element, 'diffs', {
        get: function() { return diffs; },
      });
      element.push('_expandedFilePaths', path);
    });

    suite('_handleFileListTap', function() {
      function testForModifier(modifier) {
        var e = {preventDefault: function() {}};
        e.detail = {sourceEvent: {}};
        e.target = {
          dataset: {path: '/test'},
          classList: element.classList,
        };

        e.detail.sourceEvent[modifier] = true;

        var togglePathStub = sandbox.stub(element, '_togglePathExpanded');
        element._userPrefs = { expand_inline_diffs: true };

        element._handleFileListTap(e);
        assert.isFalse(togglePathStub.called);

        e.detail.sourceEvent[modifier] = false;
        element._handleFileListTap(e);
        assert.equal(togglePathStub.callCount, 1);

        element._userPrefs = { expand_inline_diffs: false };
        element._handleFileListTap(e);
        assert.equal(togglePathStub.callCount, 1);
      }

      test('_handleFileListTap meta', function() {
        testForModifier('metaKey');
      });

      test('_handleFileListTap ctrl', function() {
        testForModifier('ctrlKey');
      });
    });

    test('_renderInOrder', function(done) {
      var reviewStub = sandbox.stub(element, '_reviewFile');
      var callCount = 0;
      var diffs = [{
        path: 'p0',
        reload: function() {
          assert.equal(callCount++, 2);
          return Promise.resolve();
        },
      }, {
        path: 'p1',
        reload: function() {
          assert.equal(callCount++, 1);
          return Promise.resolve();
        },
      }, {
        path: 'p2',
        reload: function() {
          assert.equal(callCount++, 0);
          return Promise.resolve();
        },
      }];
      element._renderInOrder(['p2', 'p1', 'p0'], diffs, 3)
        .then(function() {
          assert.isFalse(reviewStub.called);
          done();
        });
    });

    test('_renderInOrder logged in', function(done) {
      element._isLoggedIn = true;
      var reviewStub = sandbox.stub(element, '_reviewFile');
      var callCount = 0;
      var diffs = [{
        path: 'p0',
        reload: function() {
          assert.equal(reviewStub.callCount, 2);
          assert.equal(callCount++, 2);
          return Promise.resolve();
        },
      }, {
        path: 'p1',
        reload: function() {
          assert.equal(reviewStub.callCount, 1);
          assert.equal(callCount++, 1);
          return Promise.resolve();
        },
      }, {
        path: 'p2',
        reload: function() {
          assert.equal(reviewStub.callCount, 0);
          assert.equal(callCount++, 0);
          return Promise.resolve();
        },
      }];
      element._renderInOrder(['p2', 'p1', 'p0'], diffs, 3)
        .then(function() {
          assert.equal(reviewStub.callCount, 3);
          done();
        });
    });
  });

  suite('gr-file-list inline diff tests', function() {
    var element;
    var sandbox;

    var setupDiff = function(diff) {
      var mock = document.createElement('mock-diff-response');
      diff._diff = mock.diffResponse;
      diff._comments = {
        left: [],
        right: [],
      };
      diff.prefs = {
        context: 10,
        tab_size: 8,
        font_size: 12,
        line_length: 100,
        cursor_blink_rate: 0,
        line_wrapping: false,
        intraline_difference: true,
        show_line_endings: true,
        show_tabs: true,
        show_whitespace_errors: true,
        syntax_highlighting: true,
        auto_hide_diff_table_header: true,
        theme: 'DEFAULT',
        ignore_whitespace: 'IGNORE_NONE',
      };
      diff._renderDiffTable();
    };

    var renderAndGetNewDiffs = function(index) {
      var diffs =
          Polymer.dom(element.root).querySelectorAll('gr-diff');

      for (var i = index; i < diffs.length; i++) {
        setupDiff(diffs[i]);
      }

      element._updateDiffCursor();
      element.$.diffCursor.handleDiffUpdate();
      return diffs;
    };

    setup(function() {
      sandbox = sinon.sandbox.create();
      stub('gr-rest-api-interface', {
        getLoggedIn: function() { return Promise.resolve(true); },
        getPreferences: function() { return Promise.resolve({}); },
      });
      stub('gr-date-formatter', {
        _loadTimeFormat: function() { return Promise.resolve(''); },
      });
      stub('gr-diff', {
        reload: function() { return Promise.resolve(); },
      });
      element = fixture('basic');
      element.numFilesShown = 75;
      element.selectedIndex = 0;
      element._files = [
        {__path: '/COMMIT_MSG', lines_inserted: 9},
        {
          __path: 'file_added_in_rev2.txt',
          lines_inserted: 1,
          lines_deleted: 1,
          size_delta: 10,
          size: 100,
        },
        {
          __path: 'myfile.txt',
          lines_inserted: 1,
          lines_deleted: 1,
          size_delta: 10,
          size: 100,
        },
      ];
      element._reviewed = ['/COMMIT_MSG', 'myfile.txt'];
      element._loggedIn = true;
      element.changeNum = '42';
      element.patchRange = {
        basePatchNum: 'PARENT',
        patchNum: '2',
      };
      sandbox.stub(window, 'fetch', function() {
        return Promise.resolve();
      });
      flushAsynchronousOperations();
    });

    teardown(function() {
      sandbox.restore();
    });

    test('cursor with individually opened files', function() {
      MockInteractions.pressAndReleaseKeyOn(element, 73, null, 'i');
      flushAsynchronousOperations();
      var diffs = renderAndGetNewDiffs(0);
      var diffStops = diffs[0].getCursorStops();

      // 1 diff should be rendered.
      assert.equal(diffs.length, 1);

      // No line number is selected.
      assert.isFalse(diffStops[10].classList.contains('target-row'));

      // Tapping content on a line selects the line number.
      MockInteractions.tap(Polymer.dom(
          diffStops[10]).querySelectorAll('.contentText')[0]);
      flushAsynchronousOperations();
      assert.isTrue(diffStops[10].classList.contains('target-row'));

      // Keyboard shortcuts are still moving the file cursor, not the diff
      // cursor.
      MockInteractions.pressAndReleaseKeyOn(element, 74, null, 'j');
      flushAsynchronousOperations();
      assert.isTrue(diffStops[10].classList.contains('target-row'));
      assert.isFalse(diffStops[11].classList.contains('target-row'));

      // The file cusor is now at 1.
      assert.equal(element.$.fileCursor.index, 1);
      MockInteractions.pressAndReleaseKeyOn(element, 73, null, 'i');
      flushAsynchronousOperations();

      diffs = renderAndGetNewDiffs(1);
      // Two diffs should be rendered.
      assert.equal(diffs.length, 2);
      var diffStopsFirst = diffs[0].getCursorStops();
      var diffStopsSecond = diffs[1].getCursorStops();

      // The line on the first diff is stil selected
      assert.isTrue(diffStopsFirst[10].classList.contains('target-row'));
      assert.isFalse(diffStopsSecond[10].classList.contains('target-row'));
    });

    test('cursor with toggle all files', function() {
      MockInteractions.pressAndReleaseKeyOn(element, 73, 'shift', 'i');
      flushAsynchronousOperations();

      var diffs = renderAndGetNewDiffs(0);
      var diffStops = diffs[0].getCursorStops();

      // 1 diff should be rendered.
      assert.equal(diffs.length, 3);

      // No line number is selected.
      assert.isFalse(diffStops[10].classList.contains('target-row'));

      // Tapping content on a line selects the line number.
      MockInteractions.tap(Polymer.dom(
          diffStops[10]).querySelectorAll('.contentText')[0]);
      flushAsynchronousOperations();
      assert.isTrue(diffStops[10].classList.contains('target-row'));

      // Keyboard shortcuts are still moving the file cursor, not the diff
      // cursor.
      MockInteractions.pressAndReleaseKeyOn(element, 74, null, 'j');
      flushAsynchronousOperations();
      assert.isFalse(diffStops[10].classList.contains('target-row'));
      assert.isTrue(diffStops[11].classList.contains('target-row'));

      // The file cusor is still at 0.
      assert.equal(element.$.fileCursor.index, 0);
    });

    suite('n key presses', function() {
      var nKeySpy;
      var nextCommentStub;
      var nextChunkStub;
      var fileRows;
      setup(function() {
        nKeySpy = sandbox.spy(element, '_handleNKey');
        nextCommentStub = sandbox.stub(element.$.diffCursor,
            'moveToNextCommentThread');
        nextChunkStub = sandbox.stub(element.$.diffCursor,
            'moveToNextChunk');
        fileRows =
            Polymer.dom(element.root).querySelectorAll('.row:not(.header)');
      });
      test('n key with all files expanded and no shift key', function() {
        MockInteractions.pressAndReleaseKeyOn(fileRows[0], 73, null, 'i');
        flushAsynchronousOperations();

        // Handle N key should return before calling diff cursor functions.
        MockInteractions.pressAndReleaseKeyOn(element, 78, null, 'n');
        assert.isTrue(nKeySpy.called);
        assert.isFalse(nextCommentStub.called);

        // This is also called in diffCursor.moveToFirstChunk.
        assert.equal(nextChunkStub.callCount, 1);
        assert.isFalse(!!element._showInlineDiffs);
      });

      test('n key with all files expanded and shift key', function() {
        MockInteractions.pressAndReleaseKeyOn(fileRows[0], 73, null, 'i');
        flushAsynchronousOperations();

        MockInteractions.pressAndReleaseKeyOn(element, 78, 'shift', 'n');
        assert.isTrue(nKeySpy.called);
        assert.isFalse(nextCommentStub.called);

        // This is also called in diffCursor.moveToFirstChunk.
        assert.equal(nextChunkStub.callCount, 1);
        assert.isFalse(!!element._showInlineDiffs);
      });

      test('n key without all files expanded and shift key', function() {
        MockInteractions.pressAndReleaseKeyOn(fileRows[0], 73, 'shift', 'i');
        flushAsynchronousOperations();

        MockInteractions.pressAndReleaseKeyOn(element, 78, null, 'n');
        assert.isTrue(nKeySpy.called);
        assert.isFalse(nextCommentStub.called);

        // This is also called in diffCursor.moveToFirstChunk.
        assert.equal(nextChunkStub.callCount, 2);
        assert.isTrue(element._showInlineDiffs);
      });

      test('n key without all files expanded and no shift key', function() {
        MockInteractions.pressAndReleaseKeyOn(fileRows[0], 73, 'shift', 'i');
        flushAsynchronousOperations();

        MockInteractions.pressAndReleaseKeyOn(element, 78, 'shift', 'n');
        assert.isTrue(nKeySpy.called);
        assert.isTrue(nextCommentStub.called);

        // This is also called in diffCursor.moveToFirstChunk.
        assert.equal(nextChunkStub.callCount, 1);
        assert.isTrue(element._showInlineDiffs);
      });
    });

    test('_openSelectedFile behavior', () => {
      const _files = element._files;
      element.set('_files', []);
      const showStub = sandbox.stub(page, 'show');
      // Noop when there are no files.
      element._openSelectedFile();
      assert.isFalse(showStub.called);

      element.set('_files', _files);
      flushAsynchronousOperations();
       // Navigates when a file is selected.
      element._openSelectedFile();
      assert.isTrue(showStub.called);
    });
  });
</script>