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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/custom-elements-es5-adapter.js"></script>

<script src="/bower_components/webcomponentsjs/webcomponents-lite.js"></script>
<script src="/bower_components/web-component-tester/browser.js"></script>
<script src="../../../test/test-pre-setup.js"></script>
<script src="/components/web-component-tester/data/a11ySuite.js"></script>
<link rel="import" href="../../../test/common-test-setup.html"/>
<script src="/bower_components/page/page.js"></script>
<link rel="import" href="../../diff/gr-comment-api/gr-comment-api.html">
<script src="../../../scripts/util.js"></script>

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

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

<dom-module id="comment-api-mock">
  <template>
    <gr-file-list id="fileList"
        change-comments="[[_changeComments]]"
        on-reload-drafts="_reloadDraftsWithCallback"></gr-file-list>
    <gr-comment-api id="commentAPI"></gr-comment-api>
  </template>
  <script src="../../diff/gr-comment-api/gr-comment-api-mock.js"></script>
</dom-module>

<test-fixture id="basic">
  <template>
    <comment-api-mock></comment-api-mock>
  </template>
</test-fixture>

<script>
  suite('gr-file-list tests', async () => {
    await readyToTest();

    const kb = window.Gerrit.KeyboardShortcutBinder;
    kb.bindShortcut(kb.Shortcut.LEFT_PANE, 'shift+left');
    kb.bindShortcut(kb.Shortcut.RIGHT_PANE, 'shift+right');
    kb.bindShortcut(kb.Shortcut.TOGGLE_INLINE_DIFF, 'i:keyup');
    kb.bindShortcut(kb.Shortcut.TOGGLE_ALL_INLINE_DIFFS, 'shift+i:keyup');
    kb.bindShortcut(kb.Shortcut.CURSOR_NEXT_FILE, 'j', 'down');
    kb.bindShortcut(kb.Shortcut.CURSOR_PREV_FILE, 'k', 'up');
    kb.bindShortcut(kb.Shortcut.NEXT_LINE, 'j', 'down');
    kb.bindShortcut(kb.Shortcut.PREV_LINE, 'k', 'up');
    kb.bindShortcut(kb.Shortcut.NEW_COMMENT, 'c');
    kb.bindShortcut(kb.Shortcut.OPEN_LAST_FILE, '[');
    kb.bindShortcut(kb.Shortcut.OPEN_FIRST_FILE, ']');
    kb.bindShortcut(kb.Shortcut.OPEN_FILE, 'o');
    kb.bindShortcut(kb.Shortcut.NEXT_CHUNK, 'n');
    kb.bindShortcut(kb.Shortcut.PREV_CHUNK, 'p');
    kb.bindShortcut(kb.Shortcut.TOGGLE_FILE_REVIEWED, 'r');
    kb.bindShortcut(kb.Shortcut.TOGGLE_LEFT_PANE, 'shift+a');

    let element;
    let commentApiWrapper;
    let sandbox;
    let saveStub;
    let loadCommentSpy;

    suite('basic tests', () => {
      setup(done => {
        sandbox = sinon.sandbox.create();
        stub('gr-rest-api-interface', {
          getLoggedIn() { return Promise.resolve(true); },
          getPreferences() { return Promise.resolve({}); },
          getDiffPreferences() { return Promise.resolve({}); },
          getDiffComments() { return Promise.resolve({}); },
          getDiffRobotComments() { return Promise.resolve({}); },
          getDiffDrafts() { return Promise.resolve({}); },
          getAccountCapabilities() { return Promise.resolve({}); },
        });
        stub('gr-date-formatter', {
          _loadTimeFormat() { return Promise.resolve(''); },
        });
        stub('gr-diff-host', {
          reload() { return Promise.resolve(); },
        });

        // Element must be wrapped in an element with direct access to the
        // comment API.
        commentApiWrapper = fixture('basic');
        element = commentApiWrapper.$.fileList;
        loadCommentSpy = sandbox.spy(commentApiWrapper.$.commentAPI, 'loadAll');

        // Stub methods on the changeComments object after changeComments has
        // been initialized.
        commentApiWrapper.loadComments().then(() => {
          sandbox.stub(element.changeComments, 'getPaths').returns({});
          sandbox.stub(element.changeComments, 'getCommentsBySideForPath')
              .returns({meta: {}, left: [], right: []});
          done();
        });
        element._loading = false;
        element.diffPrefs = {};
        element.numFilesShown = 200;
        element.patchRange = {
          basePatchNum: 'PARENT',
          patchNum: '2',
        };
        saveStub = sandbox.stub(element, '_saveReviewedState',
            () => Promise.resolve());
      });

      teardown(() => {
        sandbox.restore();
      });

      test('correct number of files are shown', () => {
        element.fileListIncrement = 300;
        element._filesByPath = _.range(500)
            .reduce((_filesByPath, i) => {
              _filesByPath['/file' + i] = {lines_inserted: 9};
              return _filesByPath;
            }, {});

        flushAsynchronousOperations();
        assert.equal(
            Polymer.dom(element.root).querySelectorAll('.file-row').length,
            element.numFilesShown);
        const controlRow = element.$$('.controlRow');
        assert.isFalse(controlRow.classList.contains('invisible'));
        assert.equal(element.$.incrementButton.textContent.trim(),
            'Show 300 more');
        assert.equal(element.$.showAllButton.textContent.trim(),
            'Show all 500 files');

        MockInteractions.tap(element.$.showAllButton);
        flushAsynchronousOperations();

        assert.equal(element.numFilesShown, 500);
        assert.equal(element._shownFiles.length, 500);
        assert.isTrue(controlRow.classList.contains('invisible'));
      });

      test('rendering each row calls the _reportRenderedRow method', () => {
        const renderedStub = sandbox.stub(element, '_reportRenderedRow');
        element._filesByPath = _.range(10)
            .reduce((_filesByPath, i) => {
              _filesByPath['/file' + i] = {lines_inserted: 9};
              return _filesByPath;
            }, {});
        flushAsynchronousOperations();
        assert.equal(
            Polymer.dom(element.root).querySelectorAll('.file-row').length, 10);
        assert.equal(renderedStub.callCount, 10);
      });

      test('calculate totals for patch number', () => {
        element._filesByPath = {
          '/COMMIT_MSG': {
            lines_inserted: 9,
          },
          '/MERGE_LIST': {
            lines_inserted: 9,
          },
          'file_added_in_rev2.txt': {
            lines_inserted: 1,
            lines_deleted: 1,
            size_delta: 10,
            size: 100,
          },
          '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._filesByPath = {
          'file_added_in_rev2.txt': {
            lines_inserted: 1,
            lines_deleted: 1,
          },
          '/COMMIT_MSG': {
            lines_inserted: 9,
          },
          '/MERGE_LIST': {
            lines_inserted: 9,
          },
          '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._filesByPath = {
          'file_added_in_rev2.txt': {
            lines_inserted: 1,
            lines_deleted: 1,
          },
          '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._filesByPath = {
          'file_added_in_rev2.txt': {lines_inserted: 1},
          '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', () => {
        element._filesByPath = {
          '/COMMIT_MSG': {lines_inserted: 9},
          'file_binary_1': {binary: true, size_delta: 10, size: 100},
          'file_binary_2': {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', () => {
        element._filesByPath = {
          '/COMMIT_MSG': {lines_inserted: 9},
          'file_binary_1': {binary: true, size_delta: 10, size: 100},
          'file_binary_2': {binary: true, size_delta: -5, size: 120},
          'myfile.txt': {lines_deleted: 5, size_delta: -10, size: 100},
          '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', () => {
        const 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 (const bytes in table) {
          if (table.hasOwnProperty(bytes)) {
            assert.equal(element._formatBytes(bytes), table[bytes]);
          }
        }
      });

      test('_formatPercentage function', () => {
        const 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%)',
          },
        ];

        for (const item of table) {
          assert.equal(element._formatPercentage(
              item.size, item.delta), item.display);
        }
      });

      test('comment filtering', () => {
        element.changeComments._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,
            },
          ],
        };
        element.changeComments._drafts = {
          '/COMMIT_MSG': [
            {
              patch_set: 1,
              message: 'hi',
              updated: '2017-02-15 16:40:49',
              id: '5',
              unresolved: true,
            },
            {
              patch_set: 1,
              message: 'fyi',
              updated: '2017-02-15 16:40:49',
              id: '6',
              unresolved: false,
            },
          ],
          'unresolved.file': [
            {
              patch_set: 1,
              message: 'hi',
              updated: '2017-02-11 16:40:49',
              id: '4',
              unresolved: false,
            },
          ],
        };

        const parentTo1 = {
          basePatchNum: 'PARENT',
          patchNum: '1',
        };

        const parentTo2 = {
          basePatchNum: 'PARENT',
          patchNum: '2',
        };

        const _1To2 = {
          basePatchNum: '1',
          patchNum: '2',
        };

        assert.equal(
            element._computeCommentsString(element.changeComments, parentTo1,
                '/COMMIT_MSG', 'comment'), '2 comments (1 unresolved)');
        assert.equal(
            element._computeCommentsString(element.changeComments, _1To2,
                '/COMMIT_MSG', 'comment'), '3 comments (1 unresolved)');
        assert.equal(
            element._computeCommentsStringMobile(element.changeComments, parentTo1
                , '/COMMIT_MSG'), '2c');
        assert.equal(
            element._computeCommentsStringMobile(element.changeComments, _1To2
                , '/COMMIT_MSG'), '3c');
        assert.equal(
            element._computeDraftsString(element.changeComments, parentTo1,
                'unresolved.file'), '1 draft');
        assert.equal(
            element._computeDraftsString(element.changeComments, _1To2,
                'unresolved.file'), '1 draft');
        assert.equal(
            element._computeDraftsStringMobile(element.changeComments, parentTo1,
                'unresolved.file'), '1d');
        assert.equal(
            element._computeDraftsStringMobile(element.changeComments, _1To2,
                'unresolved.file'), '1d');
        assert.equal(
            element._computeCommentsString(element.changeComments, parentTo1,
                'myfile.txt', 'comment'), '1 comment');
        assert.equal(
            element._computeCommentsString(element.changeComments, _1To2,
                'myfile.txt', 'comment'), '3 comments');
        assert.equal(
            element._computeCommentsStringMobile(
                element.changeComments,
                parentTo1,
                'myfile.txt'
            ), '1c');
        assert.equal(
            element._computeCommentsStringMobile(element.changeComments, _1To2,
                'myfile.txt'), '3c');
        assert.equal(
            element._computeDraftsString(element.changeComments, parentTo1,
                'myfile.txt'), '');
        assert.equal(
            element._computeDraftsString(element.changeComments, _1To2,
                'myfile.txt'), '');
        assert.equal(
            element._computeDraftsStringMobile(element.changeComments, parentTo1,
                'myfile.txt'), '');
        assert.equal(
            element._computeDraftsStringMobile(element.changeComments, _1To2,
                'myfile.txt'), '');
        assert.equal(
            element._computeCommentsString(element.changeComments, parentTo1,
                'file_added_in_rev2.txt', 'comment'), '');
        assert.equal(
            element._computeCommentsString(element.changeComments, _1To2,
                'file_added_in_rev2.txt', 'comment'), '');
        assert.equal(
            element._computeCommentsStringMobile(
                element.changeComments,
                parentTo1,
                'file_added_in_rev2.txt'
            ), '');
        assert.equal(
            element._computeCommentsStringMobile(element.changeComments, _1To2,
                'file_added_in_rev2.txt'), '');
        assert.equal(
            element._computeDraftsString(element.changeComments, parentTo1,
                'file_added_in_rev2.txt'), '');
        assert.equal(
            element._computeDraftsString(element.changeComments, _1To2,
                'file_added_in_rev2.txt'), '');
        assert.equal(
            element._computeDraftsStringMobile(element.changeComments, parentTo1,
                'file_added_in_rev2.txt'), '');
        assert.equal(
            element._computeDraftsStringMobile(element.changeComments, _1To2,
                'file_added_in_rev2.txt'), '');
        assert.equal(
            element._computeCommentsString(element.changeComments, parentTo2,
                '/COMMIT_MSG', 'comment'), '1 comment');
        assert.equal(
            element._computeCommentsString(element.changeComments, _1To2,
                '/COMMIT_MSG', 'comment'), '3 comments (1 unresolved)');
        assert.equal(
            element._computeCommentsStringMobile(
                element.changeComments,
                parentTo2,
                '/COMMIT_MSG'
            ), '1c');
        assert.equal(
            element._computeCommentsStringMobile(element.changeComments, _1To2,
                '/COMMIT_MSG'), '3c');
        assert.equal(
            element._computeDraftsString(element.changeComments, parentTo1,
                '/COMMIT_MSG'), '2 drafts');
        assert.equal(
            element._computeDraftsString(element.changeComments, _1To2,
                '/COMMIT_MSG'), '2 drafts');
        assert.equal(
            element._computeDraftsStringMobile(
                element.changeComments,
                parentTo1,
                '/COMMIT_MSG'
            ), '2d');
        assert.equal(
            element._computeDraftsStringMobile(element.changeComments, _1To2,
                '/COMMIT_MSG'), '2d');
        assert.equal(
            element._computeCommentsString(element.changeComments, parentTo2,
                'myfile.txt', 'comment'), '2 comments');
        assert.equal(
            element._computeCommentsString(element.changeComments, _1To2,
                'myfile.txt', 'comment'), '3 comments');
        assert.equal(
            element._computeCommentsStringMobile(
                element.changeComments,
                parentTo2,
                'myfile.txt'
            ), '2c');
        assert.equal(
            element._computeCommentsStringMobile(element.changeComments, _1To2,
                'myfile.txt'), '3c');
        assert.equal(
            element._computeDraftsStringMobile(element.changeComments, parentTo2,
                'myfile.txt'), '');
        assert.equal(
            element._computeDraftsStringMobile(element.changeComments, _1To2,
                'myfile.txt'), '');
        assert.equal(
            element._computeCommentsString(element.changeComments, parentTo2,
                'file_added_in_rev2.txt', 'comment'), '');
        assert.equal(
            element._computeCommentsString(element.changeComments, _1To2,
                'file_added_in_rev2.txt', 'comment'), '');
        assert.equal(
            element._computeCommentsString(element.changeComments, parentTo2,
                'unresolved.file', 'comment'), '3 comments (1 unresolved)');
        assert.equal(
            element._computeCommentsString(element.changeComments, _1To2,
                'unresolved.file', 'comment'), '3 comments (1 unresolved)');
      });

      test('_reviewedTitle', () => {
        assert.equal(
            element._reviewedTitle(true), 'Mark as not reviewed (shortcut: r)');

        assert.equal(
            element._reviewedTitle(false), 'Mark as reviewed (shortcut: r)');
      });

      suite('keyboard shortcuts', () => {
        setup(() => {
          element._filesByPath = {
            '/COMMIT_MSG': {},
            'file_added_in_rev2.txt': {},
            'myfile.txt': {},
          };
          element.changeNum = '42';
          element.patchRange = {
            basePatchNum: 'PARENT',
            patchNum: '2',
          };
          element.change = {_number: 42};
          element.$.fileCursor.setCursorAtIndex(0);
        });

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

        test('keyboard shortcuts', () => {
          flushAsynchronousOperations();

          const 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.$.fileCursor.index, 0);
          // down should not move the cursor.
          MockInteractions.pressAndReleaseKeyOn(element, 40, null, 'down');
          assert.equal(element.$.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');

          const navStub = sandbox.stub(Gerrit.Nav, 'navigateToDiff');
          assert.equal(element.$.fileCursor.index, 2);
          assert.equal(element.selectedIndex, 2);

          // k with a modifier should not move the cursor.
          MockInteractions.pressAndReleaseKeyOn(element, 75, 'shift', 'k');
          assert.equal(element.$.fileCursor.index, 2);

          // up should not move the cursor.
          MockInteractions.pressAndReleaseKeyOn(element, 38, null, 'down');
          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(navStub.lastCall.calledWith(element.change,
              'file_added_in_rev2.txt', '2'),
          '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);

          const createCommentInPlaceStub = sandbox.stub(element.$.diffCursor,
              'createCommentInPlace');
          MockInteractions.pressAndReleaseKeyOn(element, 67, null, 'c');
          assert.isTrue(createCommentInPlaceStub.called);
        });

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

          MockInteractions.keyUpOn(element, 73, 'shift', 'i');
          flushAsynchronousOperations();
          for (const index in element.diffs) {
            if (!element.diffs.hasOwnProperty(index)) { continue; }
            assert.include(element._expandedFilePaths, element.diffs[index].path);
          }
          MockInteractions.keyUpOn(element, 73, 'shift', 'i');
          flushAsynchronousOperations();
          for (const index in element.diffs) {
            if (!element.diffs.hasOwnProperty(index)) { continue; }
            assert.notInclude(element._expandedFilePaths,
                element.diffs[index].path);
          }
        });

        test('r key toggles reviewed flag', () => {
          const reducer = (accum, file) => (file.isReviewed ? ++accum : accum);
          const getNumReviewed = () => element._files.reduce(reducer, 0);
          flushAsynchronousOperations();

          // Default state should be unreviewed.
          assert.equal(getNumReviewed(), 0);

          // Press the review key to toggle it (set the flag).
          MockInteractions.pressAndReleaseKeyOn(element, 82, null, 'r');
          flushAsynchronousOperations();
          assert.equal(getNumReviewed(), 1);

          // Press the review key to toggle it (clear the flag).
          MockInteractions.pressAndReleaseKeyOn(element, 82, null, 'r');
          assert.equal(getNumReviewed(), 0);
        });

        suite('_handleOpenFile', () => {
          let interact;

          setup(() => {
            sandbox.stub(element, 'shouldSuppressKeyboardShortcut')
                .returns(false);
            sandbox.stub(element, 'modifierPressed').returns(false);
            const openCursorStub = sandbox.stub(element, '_openCursorFile');
            const openSelectedStub = sandbox.stub(element, '_openSelectedFile');
            const expandStub = sandbox.stub(element, '_togglePathExpanded');

            interact = function(opt_payload) {
              openCursorStub.reset();
              openSelectedStub.reset();
              expandStub.reset();

              const e = new CustomEvent('fake-keyboard-event', opt_payload);
              sinon.stub(e, 'preventDefault');
              element._handleOpenFile(e);
              assert.isTrue(e.preventDefault.called);
              const result = {};
              if (openCursorStub.called) {
                result.opened_cursor = true;
              }
              if (openSelectedStub.called) {
                result.opened_selected = true;
              }
              if (expandStub.called) {
                result.expanded = true;
              }
              return result;
            };
          });

          test('open from selected file', () => {
            element._showInlineDiffs = false;
            assert.deepEqual(interact(), {opened_selected: true});
          });

          test('open from diff cursor', () => {
            element._showInlineDiffs = true;
            assert.deepEqual(interact(), {opened_cursor: true});
          });

          test('expand when user prefers', () => {
            element._showInlineDiffs = false;
            assert.deepEqual(interact(), {opened_selected: true});
            element._userPrefs = {};
            assert.deepEqual(interact(), {opened_selected: true});
          });
        });

        test('shift+left/shift+right', () => {
          const moveLeftStub = sandbox.stub(element.$.diffCursor, 'moveLeft');
          const moveRightStub = sandbox.stub(element.$.diffCursor, 'moveRight');

          let noDiffsExpanded = true;
          sandbox.stub(element, '_noDiffsExpanded', () => noDiffsExpanded);

          MockInteractions.pressAndReleaseKeyOn(element, 73, 'shift', 'left');
          assert.isFalse(moveLeftStub.called);
          MockInteractions.pressAndReleaseKeyOn(element, 73, 'shift', 'right');
          assert.isFalse(moveRightStub.called);

          noDiffsExpanded = false;

          MockInteractions.pressAndReleaseKeyOn(element, 73, 'shift', 'left');
          assert.isTrue(moveLeftStub.called);
          MockInteractions.pressAndReleaseKeyOn(element, 73, 'shift', 'right');
          assert.isTrue(moveRightStub.called);
        });
      });

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

        assert.equal(element._computeClass('clazz', '/foo/bar/baz'), 'clazz');
        assert.equal(element._computeClass('clazz', '/COMMIT_MSG'),
            'clazz invisible');
      });

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

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

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

        const commitReviewLabel = fileRows[0].querySelector('.reviewedLabel');
        const markReviewLabel = commitMsg.nextElementSibling;
        assert.isTrue(commitReviewLabel.classList.contains('isReviewed'));
        assert.equal(markReviewLabel.textContent, 'MARK UNREVIEWED');

        const clickSpy = sandbox.spy(element, '_handleFileListClick');
        MockInteractions.tap(markReviewLabel);
        assert.isTrue(saveStub.lastCall.calledWithExactly('/COMMIT_MSG', false));
        assert.isFalse(commitReviewLabel.classList.contains('isReviewed'));
        assert.equal(markReviewLabel.textContent, 'MARK REVIEWED');
        assert.isTrue(clickSpy.lastCall.args[0].defaultPrevented);

        MockInteractions.tap(markReviewLabel);
        assert.isTrue(saveStub.lastCall.calledWithExactly('/COMMIT_MSG', true));
        assert.isTrue(commitReviewLabel.classList.contains('isReviewed'));
        assert.equal(markReviewLabel.textContent, 'MARK UNREVIEWED');
        assert.isTrue(clickSpy.lastCall.args[0].defaultPrevented);
      });

      test('_computeFileStatusLabel', () => {
        assert.equal(element._computeFileStatusLabel('A'), 'Added');
        assert.equal(element._computeFileStatusLabel('M'), 'Modified');
      });

      test('_handleFileListClick', () => {
        element._filesByPath = {
          '/COMMIT_MSG': {},
          'f1.txt': {},
          'f2.txt': {},
        };
        element.changeNum = '42';
        element.patchRange = {
          basePatchNum: 'PARENT',
          patchNum: '2',
        };

        const clickSpy = sandbox.spy(element, '_handleFileListClick');
        const reviewStub = sandbox.stub(element, '_reviewFile');
        const toggleExpandSpy = sandbox.spy(element, '_togglePathExpanded');

        const row = Polymer.dom(element.root)
            .querySelector('.row[data-path="f1.txt"]');

        // Click on the expand button, resulting in _togglePathExpanded being
        // called and not resulting in a call to _reviewFile.
        row.querySelector('div.show-hide').click();
        assert.isTrue(clickSpy.calledOnce);
        assert.isTrue(toggleExpandSpy.calledOnce);
        assert.isFalse(reviewStub.called);

        // Click inside the diff. This should result in no additional calls to
        // _togglePathExpanded or _reviewFile.
        Polymer.dom(element.root).querySelector('gr-diff-host')
            .click();
        assert.isTrue(clickSpy.calledTwice);
        assert.isTrue(toggleExpandSpy.calledOnce);
        assert.isFalse(reviewStub.called);

        // Click the reviewed checkbox, resulting in a call to _reviewFile, but
        // no additional call to _togglePathExpanded.
        row.querySelector('.markReviewed').click();
        assert.isTrue(clickSpy.calledThrice);
        assert.isTrue(toggleExpandSpy.calledOnce);
        assert.isTrue(reviewStub.calledOnce);
      });

      test('_handleFileListClick editMode', () => {
        element._filesByPath = {
          '/COMMIT_MSG': {},
          'f1.txt': {},
          'f2.txt': {},
        };
        element.changeNum = '42';
        element.patchRange = {
          basePatchNum: 'PARENT',
          patchNum: '2',
        };
        element.editMode = true;
        flushAsynchronousOperations();
        const clickSpy = sandbox.spy(element, '_handleFileListClick');
        const toggleExpandSpy = sandbox.spy(element, '_togglePathExpanded');

        // Tap the edit controls. Should be ignored by _handleFileListClick.
        MockInteractions.tap(element.$$('.editFileControls'));
        assert.isTrue(clickSpy.calledOnce);
        assert.isFalse(toggleExpandSpy.called);
      });

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

      test('checkbox shows/hides diff inline', () => {
        element._filesByPath = {
          'myfile.txt': {},
        };
        element.changeNum = '42';
        element.patchRange = {
          basePatchNum: 'PARENT',
          patchNum: '2',
        };
        element.$.fileCursor.setCursorAtIndex(0);
        sandbox.stub(element, '_expandedPathsChanged');
        flushAsynchronousOperations();
        const fileRows =
            Polymer.dom(element.root).querySelectorAll('.row:not(.header-row)');
        // Because the label surrounds the input, the tap event is triggered
        // there first.
        const showHideLabel = fileRows[0].querySelector('label.show-hide');
        const 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('diff mode correctly toggles the diffs', () => {
        element._filesByPath = {
          'myfile.txt': {},
        };
        element.changeNum = '42';
        element.patchRange = {
          basePatchNum: 'PARENT',
          patchNum: '2',
        };
        sandbox.spy(element, '_updateDiffPreferences');
        element.$.fileCursor.setCursorAtIndex(0);
        flushAsynchronousOperations();

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

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

      test('expanded attribute not set on path when not expanded', () => {
        element._filesByPath = {
          '/COMMIT_MSG': {},
        };
        assert.isNotOk(element.$$('.expanded'));
      });

      test('tapping row ignores links', () => {
        element._filesByPath = {
          '/COMMIT_MSG': {},
        };
        element.changeNum = '42';
        element.patchRange = {
          basePatchNum: 'PARENT',
          patchNum: '2',
        };
        sandbox.stub(element, '_expandedPathsChanged');
        flushAsynchronousOperations();
        const commitMsgFile = Polymer.dom(element.root)
            .querySelectorAll('.row:not(.header-row) a.pathLink')[0];

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

        MockInteractions.tap(commitMsgFile);
        flushAsynchronousOperations();
        assert(togglePathSpy.notCalled, 'file is opened as diff view');
        assert.isNotOk(element.$$('.expanded'));
        assert.notEqual(getComputedStyle(element.$$('.show-hide')).display,
            'none');
      });

      test('_togglePathExpanded', () => {
        const path = 'path/to/my/file.txt';
        element._filesByPath = {[path]: {}};
        const renderSpy = sandbox.spy(element, '_renderInOrder');
        const collapseStub = sandbox.stub(element, '_clearCollapsedDiffs');

        assert.equal(element.$$('iron-icon').icon, 'gr-icons:expand-more');
        assert.equal(element._expandedFilePaths.length, 0);
        element._togglePathExpanded(path);
        flushAsynchronousOperations();
        assert.equal(collapseStub.lastCall.args[0].length, 0);
        assert.equal(element.$$('iron-icon').icon, 'gr-icons:expand-less');

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

        assert.equal(element.$$('iron-icon').icon, 'gr-icons:expand-more');
        assert.equal(renderSpy.callCount, 1);
        assert.notInclude(element._expandedFilePaths, path);
        assert.equal(collapseStub.lastCall.args[0].length, 1);
      });

      test('expandAllDiffs and collapseAllDiffs', () => {
        const collapseStub = sandbox.stub(element, '_clearCollapsedDiffs');
        const cursorUpdateStub = sandbox.stub(element.$.diffCursor,
            'handleDiffUpdate');

        const path = 'path/to/my/file.txt';
        element._filesByPath = {[path]: {}};
        element.expandAllDiffs();
        flushAsynchronousOperations();
        assert.isTrue(element._showInlineDiffs);
        assert.isTrue(cursorUpdateStub.calledOnce);
        assert.equal(collapseStub.lastCall.args[0].length, 0);

        element.collapseAllDiffs();
        flushAsynchronousOperations();
        assert.equal(element._expandedFilePaths.length, 0);
        assert.isFalse(element._showInlineDiffs);
        assert.isTrue(cursorUpdateStub.calledTwice);
        assert.equal(collapseStub.lastCall.args[0].length, 1);
      });

      test('_expandedPathsChanged', done => {
        sandbox.stub(element, '_reviewFile');
        const path = 'path/to/my/file.txt';
        const diffs = [{
          path,
          reload() {
            done();
          },
          cancel() {},
          getCursorStops() { return []; },
          addEventListener(eventName, callback) {
            callback(new Event(eventName));
          },
        }];
        sinon.stub(element, 'diffs', {
          get() { return diffs; },
        });
        element.push('_expandedFilePaths', path);
      });

      test('_clearCollapsedDiffs', () => {
        const diff = {
          cancel: sinon.stub(),
          clearDiffContent: sinon.stub(),
        };
        element._clearCollapsedDiffs([diff]);
        assert.isTrue(diff.cancel.calledOnce);
        assert.isTrue(diff.clearDiffContent.calledOnce);
      });

      test('filesExpanded value updates to correct enum', () => {
        element._filesByPath = {
          'foo.bar': {},
          'baz.bar': {},
        };
        flushAsynchronousOperations();
        assert.equal(element.filesExpanded,
            GrFileListConstants.FilesExpandedState.NONE);
        element.push('_expandedFilePaths', 'baz.bar');
        flushAsynchronousOperations();
        assert.equal(element.filesExpanded,
            GrFileListConstants.FilesExpandedState.SOME);
        element.push('_expandedFilePaths', 'foo.bar');
        flushAsynchronousOperations();
        assert.equal(element.filesExpanded,
            GrFileListConstants.FilesExpandedState.ALL);
        element.collapseAllDiffs();
        flushAsynchronousOperations();
        assert.equal(element.filesExpanded,
            GrFileListConstants.FilesExpandedState.NONE);
        element.expandAllDiffs();
        flushAsynchronousOperations();
        assert.equal(element.filesExpanded,
            GrFileListConstants.FilesExpandedState.ALL);
      });

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

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

      test('_renderInOrder respects diffPrefs.manual_review', () => {
        element._loggedIn = true;
        element.diffPrefs = {manual_review: true};
        const reviewStub = sandbox.stub(element, '_reviewFile');
        const diffs = [{
          path: 'p',
          reload() { return Promise.resolve(); },
        }];

        return element._renderInOrder(['p'], diffs, 1).then(() => {
          assert.isFalse(reviewStub.called);
          delete element.diffPrefs.manual_review;
          return element._renderInOrder(['p'], diffs, 1).then(() => {
            assert.isTrue(reviewStub.called);
            assert.isTrue(reviewStub.calledWithExactly('p', true));
          });
        });
      });

      test('_loadingChanged fired from reload in debouncer', done => {
        sandbox.stub(element, '_getReviewedFiles').returns(Promise.resolve([]));
        element.changeNum = 123;
        element.patchRange = {patchNum: 12};
        element._filesByPath = {'foo.bar': {}};

        element.reload().then(() => {
          assert.isFalse(element._loading);
          element.flushDebouncer('loading-change');
          assert.isFalse(element.classList.contains('loading'));
          done();
        });
        assert.isTrue(element._loading);
        assert.isFalse(element.classList.contains('loading'));
        element.flushDebouncer('loading-change');
        assert.isTrue(element.classList.contains('loading'));
      });

      test('_loadingChanged does not set class when there are no files', () => {
        sandbox.stub(element, '_getReviewedFiles').returns(Promise.resolve([]));
        element.changeNum = 123;
        element.patchRange = {patchNum: 12};
        element.reload();
        assert.isTrue(element._loading);
        element.flushDebouncer('loading-change');
        assert.isFalse(element.classList.contains('loading'));
      });
    });

    suite('size bars', () => {
      test('_computeSizeBarLayout', () => {
        assert.isUndefined(element._computeSizeBarLayout(null));
        assert.isUndefined(element._computeSizeBarLayout({}));
        assert.deepEqual(element._computeSizeBarLayout({base: []}), {
          maxInserted: 0,
          maxDeleted: 0,
          maxAdditionWidth: 0,
          maxDeletionWidth: 0,
          deletionOffset: 0,
        });

        const files = [
          {__path: '/COMMIT_MSG', lines_inserted: 10000},
          {__path: 'foo', lines_inserted: 4, lines_deleted: 10},
          {__path: 'bar', lines_inserted: 5, lines_deleted: 8},
        ];
        const layout = element._computeSizeBarLayout({base: files});
        assert.equal(layout.maxInserted, 5);
        assert.equal(layout.maxDeleted, 10);
      });

      test('_computeBarAdditionWidth', () => {
        const file = {
          __path: 'foo/bar.baz',
          lines_inserted: 5,
          lines_deleted: 0,
        };
        const stats = {
          maxInserted: 10,
          maxDeleted: 0,
          maxAdditionWidth: 60,
          maxDeletionWidth: 0,
          deletionOffset: 60,
        };

        // Uses half the space when file is half the largest addition and there
        // are no deletions.
        assert.equal(element._computeBarAdditionWidth(file, stats), 30);

        // If there are no insetions, there is no width.
        stats.maxInserted = 0;
        assert.equal(element._computeBarAdditionWidth(file, stats), 0);

        // If the insertions is not present on the file, there is no width.
        stats.maxInserted = 10;
        file.lines_inserted = undefined;
        assert.equal(element._computeBarAdditionWidth(file, stats), 0);

        // If the file is a commit message, returns zero.
        file.lines_inserted = 5;
        file.__path = '/COMMIT_MSG';
        assert.equal(element._computeBarAdditionWidth(file, stats), 0);

        // Width bottoms-out at the minimum width.
        file.__path = 'stuff.txt';
        file.lines_inserted = 1;
        stats.maxInserted = 1000000;
        assert.equal(element._computeBarAdditionWidth(file, stats), 1.5);
      });

      test('_computeBarAdditionX', () => {
        const file = {
          __path: 'foo/bar.baz',
          lines_inserted: 5,
          lines_deleted: 0,
        };
        const stats = {
          maxInserted: 10,
          maxDeleted: 0,
          maxAdditionWidth: 60,
          maxDeletionWidth: 0,
          deletionOffset: 60,
        };
        assert.equal(element._computeBarAdditionX(file, stats), 30);
      });

      test('_computeBarDeletionWidth', () => {
        const file = {
          __path: 'foo/bar.baz',
          lines_inserted: 0,
          lines_deleted: 5,
        };
        const stats = {
          maxInserted: 10,
          maxDeleted: 10,
          maxAdditionWidth: 30,
          maxDeletionWidth: 30,
          deletionOffset: 31,
        };

        // Uses a quarter the space when file is half the largest deletions and
        // there are equal additions.
        assert.equal(element._computeBarDeletionWidth(file, stats), 15);

        // If there are no deletions, there is no width.
        stats.maxDeleted = 0;
        assert.equal(element._computeBarDeletionWidth(file, stats), 0);

        // If the deletions is not present on the file, there is no width.
        stats.maxDeleted = 10;
        file.lines_deleted = undefined;
        assert.equal(element._computeBarDeletionWidth(file, stats), 0);

        // If the file is a commit message, returns zero.
        file.lines_deleted = 5;
        file.__path = '/COMMIT_MSG';
        assert.equal(element._computeBarDeletionWidth(file, stats), 0);

        // Width bottoms-out at the minimum width.
        file.__path = 'stuff.txt';
        file.lines_deleted = 1;
        stats.maxDeleted = 1000000;
        assert.equal(element._computeBarDeletionWidth(file, stats), 1.5);
      });

      test('_computeSizeBarsClass', () => {
        assert.equal(element._computeSizeBarsClass(false, 'foo/bar.baz'),
            'sizeBars desktop hide');
        assert.equal(element._computeSizeBarsClass(true, '/COMMIT_MSG'),
            'sizeBars desktop invisible');
        assert.equal(element._computeSizeBarsClass(true, 'foo/bar.baz'),
            'sizeBars desktop ');
      });
    });

    suite('gr-file-list inline diff tests', () => {
      let element;
      let sandbox;

      const commitMsgComments = [
        {
          patch_set: 2,
          id: 'ecf0b9fa_fe1a5f62',
          line: 20,
          updated: '2018-02-08 18:49:18.000000000',
          message: 'another comment',
          unresolved: true,
        },
        {
          patch_set: 2,
          id: '503008e2_0ab203ee',
          line: 10,
          updated: '2018-02-14 22:07:43.000000000',
          message: 'a comment',
          unresolved: true,
        },
        {
          patch_set: 2,
          id: 'cc788d2c_cb1d728c',
          line: 20,
          in_reply_to: 'ecf0b9fa_fe1a5f62',
          updated: '2018-02-13 22:07:43.000000000',
          message: 'response',
          unresolved: true,
        },
      ];

      const setupDiff = function(diff) {
        const mock = document.createElement('mock-diff-response');
        diff.comments = {
          left: diff.path === '/COMMIT_MSG' ? commitMsgComments : [],
          right: [],
          meta: {
            changeNum: 1,
            patchRange: {
              basePatchNum: 'PARENT',
              patchNum: 2,
            },
          },
        };
        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.diff = mock.diffResponse;
        diff.$.diff.flushDebouncer('renderDiffTable');
      };

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

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

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

      setup(done => {
        sandbox = sinon.sandbox.create();
        stub('gr-rest-api-interface', {
          getLoggedIn() { return Promise.resolve(true); },
          getPreferences() { return Promise.resolve({}); },
          getDiffComments() { return Promise.resolve({}); },
          getDiffRobotComments() { return Promise.resolve({}); },
          getDiffDrafts() { return Promise.resolve({}); },
        });
        stub('gr-date-formatter', {
          _loadTimeFormat() { return Promise.resolve(''); },
        });
        stub('gr-diff-host', {
          reload() { return Promise.resolve(); },
        });

        // Element must be wrapped in an element with direct access to the
        // comment API.
        commentApiWrapper = fixture('basic');
        element = commentApiWrapper.$.fileList;
        loadCommentSpy = sandbox.spy(commentApiWrapper.$.commentAPI, 'loadAll');
        element.diffPrefs = {};
        sandbox.stub(element, '_reviewFile');

        // Stub methods on the changeComments object after changeComments has
        // been initialized.
        commentApiWrapper.loadComments().then(() => {
          sandbox.stub(element.changeComments, 'getPaths').returns({});
          sandbox.stub(element.changeComments, 'getCommentsBySideForPath')
              .returns({meta: {}, left: [], right: []});
          done();
        });
        element._loading = false;
        element.numFilesShown = 75;
        element.selectedIndex = 0;
        element._filesByPath = {
          '/COMMIT_MSG': {lines_inserted: 9},
          'file_added_in_rev2.txt': {
            lines_inserted: 1,
            lines_deleted: 1,
            size_delta: 10,
            size: 100,
          },
          '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', () => Promise.resolve());
        flushAsynchronousOperations();
      });

      teardown(() => {
        sandbox.restore();
      });

      test('cursor with individually opened files', () => {
        MockInteractions.keyUpOn(element, 73, null, 'i');
        flushAsynchronousOperations();
        let diffs = renderAndGetNewDiffs(0);
        const 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.keyUpOn(element, 73, null, 'i');
        flushAsynchronousOperations();

        diffs = renderAndGetNewDiffs(1);
        // Two diffs should be rendered.
        assert.equal(diffs.length, 2);
        const diffStopsFirst = diffs[0].getCursorStops();
        const 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', () => {
        MockInteractions.keyUpOn(element, 73, 'shift', 'i');
        flushAsynchronousOperations();

        const diffs = renderAndGetNewDiffs(0);
        const 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', () => {
        let nKeySpy;
        let nextCommentStub;
        let nextChunkStub;
        let fileRows;

        setup(() => {
          sandbox.stub(element, '_renderInOrder').returns(Promise.resolve());
          nKeySpy = sandbox.spy(element, '_handleNextChunk');
          nextCommentStub = sandbox.stub(element.$.diffCursor,
              'moveToNextCommentThread');
          nextChunkStub = sandbox.stub(element.$.diffCursor,
              'moveToNextChunk');
          fileRows =
              Polymer.dom(element.root).querySelectorAll('.row:not(.header-row)');
        });

        test('n key with some files expanded and no shift key', () => {
          MockInteractions.keyUpOn(fileRows[0], 73, null, 'i');
          flushAsynchronousOperations();
          assert.equal(nextChunkStub.callCount, 1);

          // 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, 2);
          assert.equal(element.filesExpanded, 'some');
        });

        test('n key with some files expanded and shift key', () => {
          MockInteractions.keyUpOn(fileRows[0], 73, null, 'i');
          flushAsynchronousOperations();
          assert.equal(nextChunkStub.callCount, 1);

          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.equal(element.filesExpanded, 'some');
        });

        test('n key without all files expanded and shift key', () => {
          MockInteractions.keyUpOn(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', () => {
          MockInteractions.keyUpOn(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 _filesByPath = element._filesByPath;
        element.set('_filesByPath', {});
        const navStub = sandbox.stub(Gerrit.Nav, 'navigateToDiff');
        // Noop when there are no files.
        element._openSelectedFile();
        assert.isFalse(navStub.called);

        element.set('_filesByPath', _filesByPath);
        flushAsynchronousOperations();
        // Navigates when a file is selected.
        element._openSelectedFile();
        assert.isTrue(navStub.called);
      });

      test('_displayLine', () => {
        sandbox.stub(element, 'shouldSuppressKeyboardShortcut', () => false);
        sandbox.stub(element, 'modifierPressed', () => false);
        element._showInlineDiffs = true;
        const mockEvent = {preventDefault() {}};

        element._displayLine = false;
        element._handleCursorNext(mockEvent);
        assert.isTrue(element._displayLine);

        element._displayLine = false;
        element._handleCursorPrev(mockEvent);
        assert.isTrue(element._displayLine);

        element._displayLine = true;
        element._handleEscKey(mockEvent);
        assert.isFalse(element._displayLine);
      });

      suite('editMode behavior', () => {
        test('reviewed checkbox', () => {
          element._reviewFile.restore();
          const saveReviewStub = sandbox.stub(element, '_saveReviewedState');

          element.editMode = false;
          MockInteractions.pressAndReleaseKeyOn(element, 82, null, 'r');
          assert.isTrue(saveReviewStub.calledOnce);

          element.editMode = true;
          flushAsynchronousOperations();

          MockInteractions.pressAndReleaseKeyOn(element, 82, null, 'r');
          assert.isTrue(saveReviewStub.calledOnce);
        });

        test('_getReviewedFiles does not call API', () => {
          const apiSpy = sandbox.spy(element.$.restAPI, 'getReviewedFiles');
          element.editMode = true;
          return element._getReviewedFiles().then(files => {
            assert.equal(files.length, 0);
            assert.isFalse(apiSpy.called);
          });
        });
      });

      test('editing actions', () => {
        // Edit controls are guarded behind a dom-if initially and not rendered.
        assert.isNotOk(Polymer.dom(element.root)
            .querySelector('gr-edit-file-controls'));

        element.editMode = true;
        flushAsynchronousOperations();

        // Commit message should not have edit controls.
        const editControls =
            Array.from(
                Polymer.dom(element.root)
                    .querySelectorAll('.row:not(.header-row)'))
                .map(row => row.querySelector('gr-edit-file-controls'));
        assert.isTrue(editControls[0].classList.contains('invisible'));
      });

      test('reloadCommentsForThreadWithRootId', () => {
        // Expand the commit message diff
        MockInteractions.keyUpOn(element, 73, 'shift', 'i');
        const diffs = renderAndGetNewDiffs(0);
        flushAsynchronousOperations();

        // Two comment threads should be generated by renderAndGetNewDiffs
        const threadEls = diffs[0].getThreadEls();
        assert.equal(threadEls.length, 2);
        const threadElsByRootId = new Map(
            threadEls.map(threadEl => [threadEl.rootId, threadEl]));

        const thread1 = threadElsByRootId.get('503008e2_0ab203ee');
        assert.equal(thread1.comments.length, 1);
        assert.equal(thread1.comments[0].message, 'a comment');
        assert.equal(thread1.comments[0].line, 10);

        const thread2 = threadElsByRootId.get('ecf0b9fa_fe1a5f62');
        assert.equal(thread2.comments.length, 2);
        assert.isTrue(thread2.comments[0].unresolved);
        assert.equal(thread2.comments[0].message, 'another comment');
        assert.equal(thread2.comments[0].line, 20);

        const commentStub =
            sandbox.stub(element.changeComments, 'getCommentsForThread');
        const commentStubRes1 = [
          {
            patch_set: 2,
            id: '503008e2_0ab203ee',
            line: 20,
            updated: '2018-02-08 18:49:18.000000000',
            message: 'edited text',
            unresolved: false,
          },
        ];
        const commentStubRes2 = [
          {
            patch_set: 2,
            id: 'ecf0b9fa_fe1a5f62',
            line: 20,
            updated: '2018-02-08 18:49:18.000000000',
            message: 'another comment',
            unresolved: true,
          },
          {
            patch_set: 2,
            id: '503008e2_0ab203ee',
            line: 10,
            in_reply_to: 'ecf0b9fa_fe1a5f62',
            updated: '2018-02-14 22:07:43.000000000',
            message: 'response',
            unresolved: true,
          },
          {
            patch_set: 2,
            id: '503008e2_0ab203ef',
            line: 20,
            in_reply_to: '503008e2_0ab203ee',
            updated: '2018-02-15 22:07:43.000000000',
            message: 'a third comment in the thread',
            unresolved: true,
          },
        ];
        commentStub.withArgs('503008e2_0ab203ee').returns(
            commentStubRes1);
        commentStub.withArgs('ecf0b9fa_fe1a5f62').returns(
            commentStubRes2);

        // Reload comments from the first comment thread, which should have a
        // an updated message and a toggled resolve state.
        element.reloadCommentsForThreadWithRootId('503008e2_0ab203ee',
            '/COMMIT_MSG');
        assert.equal(thread1.comments.length, 1);
        assert.isFalse(thread1.comments[0].unresolved);
        assert.equal(thread1.comments[0].message, 'edited text');

        // Reload comments from the second comment thread, which should have a new
        // reply.
        element.reloadCommentsForThreadWithRootId('ecf0b9fa_fe1a5f62',
            '/COMMIT_MSG');
        assert.equal(thread2.comments.length, 3);

        const commentStubCount = commentStub.callCount;
        const getThreadsSpy = sandbox.spy(diffs[0], 'getThreadEls');

        // Should not be getting threads when the file is not expanded.
        element.reloadCommentsForThreadWithRootId('ecf0b9fa_fe1a5f62',
            'other/file');
        assert.isFalse(getThreadsSpy.called);
        assert.equal(commentStubCount, commentStub.callCount);

        // Should be query selecting diffs when the file is expanded.
        // Should not be fetching change comments when the rootId is not found
        // to match.
        element.reloadCommentsForThreadWithRootId('acf0b9fa_fe1a5f62',
            '/COMMIT_MSG');
        assert.isTrue(getThreadsSpy.called);
        assert.equal(commentStubCount, commentStub.callCount);
      });
    });
    a11ySuite('basic');
  });
</script>