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

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

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

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

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

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

    setup(function() {
      sandbox = sinon.sandbox.create();
    });

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

    suite('not logged in', function() {
      setup(function() {
        stub('gr-rest-api-interface', {
          getLoggedIn: function() { return Promise.resolve(false); },
        });
        element = fixture('basic');
      });

      test('toggleLeftDiff', function() {
        element.toggleLeftDiff();
        assert.isTrue(element.classList.contains('no-left'));
        element.toggleLeftDiff();
        assert.isFalse(element.classList.contains('no-left'));
      });

      test('addDraftAtLine', function(done) {
        sandbox.stub(element, '_selectLine');
        var loggedInErrorSpy = sandbox.spy();
        element.addEventListener('show-auth-required', loggedInErrorSpy);
        element.addDraftAtLine();
        flush(function() {
          assert.isTrue(loggedInErrorSpy.called);
          done();
        });
      });

      test('view does not start with displayLine classList', function() {
        assert.isFalse(
            element.$$('.diffContainer').classList.contains('displayLine'));
      });

      test('displayLine class added called when displayLine is true',
          function() {
        var spy = sandbox.spy(element, '_computeContainerClass');
        element.displayLine = true;
        assert.isTrue(spy.called);
        assert.isTrue(
            element.$$('.diffContainer').classList.contains('displayLine'));
      });

      test('get drafts', function(done) {
        element.patchRange = {basePatchNum: 0, patchNum: 0};

        var getDraftsStub = sandbox.stub(element.$.restAPI, 'getDiffDrafts');
        element._getDiffDrafts().then(function(result) {
          assert.deepEqual(result, {baseComments: [], comments: []});
          sinon.assert.notCalled(getDraftsStub);
          done();
        });
      });

      test('get robot comments', function(done) {
        element.patchRange = {basePatchNum: 0, patchNum: 0};

        var getDraftsStub = sandbox.stub(element.$.restAPI,
            'getDiffRobotComments');
        element._getDiffDrafts().then(function(result) {
          assert.deepEqual(result, {baseComments: [], comments: []});
          sinon.assert.notCalled(getDraftsStub);
          done();
        });
      });

      test('loads files weblinks', function(done) {
        var diffStub = sandbox.stub(element.$.restAPI, 'getDiff').returns(
            Promise.resolve({
              meta_a: {
                web_links: 'foo',
              },
              meta_b: {
                web_links: 'bar',
              },
            }));
        element.patchRange = {};
        element._getDiff().then(function() {
          assert.deepEqual(element.filesWeblinks, {
            meta_a: 'foo',
            meta_b: 'bar',
          });
          done();
        });
      });

      test('remove comment', function() {
        element._comments = {
          meta: {
            changeNum: '42',
            patchRange: {
              basePatchNum: 'PARENT',
              patchNum: 3,
            },
            path: '/path/to/foo',
            projectConfig: {foo: 'bar'},
          },
          left: [
            {id: 'bc1', side: 'PARENT', __commentSide: 'left'},
            {id: 'bc2', side: 'PARENT', __commentSide: 'left'},
            {id: 'bd1', __draft: true, side: 'PARENT', __commentSide: 'left'},
            {id: 'bd2', __draft: true, side: 'PARENT', __commentSide: 'left'},
          ],
          right: [
            {id: 'c1', __commentSide: 'right'},
            {id: 'c2', __commentSide: 'right'},
            {id: 'd1', __draft: true, __commentSide: 'right'},
            {id: 'd2', __draft: true, __commentSide: 'right'},
          ],
        };

        element._removeComment({});
        // Using JSON.stringify because Safari 9.1 (11601.5.17.1) doesn’t seem
        // to believe that one object deepEquals another even when they do :-/.
        assert.equal(JSON.stringify(element._comments), JSON.stringify({
          meta: {
            changeNum: '42',
            patchRange: {
              basePatchNum: 'PARENT',
              patchNum: 3,
            },
            path: '/path/to/foo',
            projectConfig: {foo: 'bar'},
          },
          left: [
            {id: 'bc1', side: 'PARENT', __commentSide: 'left'},
            {id: 'bc2', side: 'PARENT', __commentSide: 'left'},
            {id: 'bd1', __draft: true, side: 'PARENT', __commentSide: 'left'},
            {id: 'bd2', __draft: true, side: 'PARENT', __commentSide: 'left'},
          ],
          right: [
            {id: 'c1', __commentSide: 'right'},
            {id: 'c2', __commentSide: 'right'},
            {id: 'd1', __draft: true, __commentSide: 'right'},
            {id: 'd2', __draft: true, __commentSide: 'right'},
          ],
        }));

        element._removeComment({id: 'bc2', side: 'PARENT',
            __commentSide: 'left'});
        assert.deepEqual(element._comments, {
          meta: {
            changeNum: '42',
            patchRange: {
              basePatchNum: 'PARENT',
              patchNum: 3,
            },
            path: '/path/to/foo',
            projectConfig: {foo: 'bar'},
          },
          left: [
            {id: 'bc1', side: 'PARENT', __commentSide: 'left'},
            {id: 'bd1', __draft: true, side: 'PARENT', __commentSide: 'left'},
            {id: 'bd2', __draft: true, side: 'PARENT', __commentSide: 'left'},
          ],
          right: [
            {id: 'c1', __commentSide: 'right'},
            {id: 'c2', __commentSide: 'right'},
            {id: 'd1', __draft: true, __commentSide: 'right'},
            {id: 'd2', __draft: true, __commentSide: 'right'},
          ],
        });

        element._removeComment({id: 'd2', __commentSide: 'right'});
        assert.deepEqual(element._comments, {
          meta: {
            changeNum: '42',
            patchRange: {
              basePatchNum: 'PARENT',
              patchNum: 3,
            },
            path: '/path/to/foo',
            projectConfig: {foo: 'bar'},
          },
          left: [
            {id: 'bc1', side: 'PARENT', __commentSide: 'left'},
            {id: 'bd1', __draft: true, side: 'PARENT', __commentSide: 'left'},
            {id: 'bd2', __draft: true, side: 'PARENT', __commentSide: 'left'},
          ],
          right: [
            {id: 'c1', __commentSide: 'right'},
            {id: 'c2', __commentSide: 'right'},
            {id: 'd1', __draft: true, __commentSide: 'right'},
          ],
        });
      });

      test('thread groups', function() {
        var contentEl = document.createElement('div');
        var rangeToCheck = 'line-left';
        var commentSide = 'left';
        var patchNum = 1;
        var side = 'PARENT';
        var range = {
          startLine: 1,
          startChar: 1,
          endLine: 1,
          endChar: 2,
        };

        element.changeNum = 123;
        element.patchRange = {basePatchNum: 1, patchNum: 2};
        element.path = 'file.txt';

        sandbox.stub(element.$.diffBuilder, 'createCommentThreadGroup',
            function() {
          var threadGroup =
              document.createElement('gr-diff-comment-thread-group');
          threadGroup.patchForNewThreads = 1;
          return threadGroup;
        });

        // No thread groups.
        assert.isNotOk(element._getThreadGroupForLine(contentEl));

        // A thread group gets created.
        assert.isOk(element._getOrCreateThreadAtLineRange(contentEl,
            patchNum, commentSide, side));

        // Try to fetch a thread with a different range.
        range = {
          startLine: 1,
          startChar: 1,
          endLine: 1,
          endChar: 3,
        };

        assert.isOk(element._getOrCreateThreadAtLineRange(
            contentEl, patchNum, commentSide, side, range));
        // The new thread group can be fetched.
        assert.isOk(element._getThreadGroupForLine(contentEl));

        assert.equal(contentEl.querySelectorAll(
            'gr-diff-comment-thread-group').length, 1);

        var threadGroup = contentEl.querySelector(
            'gr-diff-comment-thread-group');
        var threadLength = Polymer.dom(threadGroup.root).
              querySelectorAll('gr-diff-comment-thread').length;
        assert.equal(threadLength, 2);
      });

      suite('image diffs', function() {
        var mockFile1;
        var mockFile2;
        var stubs = [];
        setup(function() {
          mockFile1 = {
            body: 'Qk06AAAAAAAAADYAAAAoAAAAAQAAAP////8BACAAAAAAAAAAAAATCwAAE' +
            'wsAAAAAAAAAAAAAAAAA/w==',
            type: 'image/bmp',
          };
          mockFile2 = {
            body: 'Qk06AAAAAAAAADYAAAAoAAAAAQAAAP////8BACAAAAAAAAAAAAATCwAAE' +
            'wsAAAAAAAAAAAAA/////w==',
            type: 'image/bmp'
          };
          var mockCommit = {
            commit: '9a1a1d10baece5efbba10bc4ccf808a67a50ac0a',
            parents: [{
              commit: '7338aa9adfe57909f1fdaf88975cdea467d3382f',
              subject: 'Added a carrot',
            }],
            author: {
              name: 'Wyatt Allen',
              email: 'wyatta@google.com',
              date: '2016-05-23 21:44:51.000000000',
              tz: -420,
            },
            committer: {
              name: 'Wyatt Allen',
              email: 'wyatta@google.com',
              date: '2016-05-25 00:25:41.000000000',
              tz: -420,
            },
            subject: 'Updated the carrot',
            message: 'Updated the carrot\n\nChange-Id: Iabcd123\n',
          };
          var mockComments = {baseComments: [], comments: []};

          stubs.push(sandbox.stub(element.$.restAPI, 'getCommitInfo',
              function() { return Promise.resolve(mockCommit); }));
          stubs.push(sandbox.stub(element.$.restAPI,
              'getCommitFileContents',
              function() { return Promise.resolve(mockFile1); }));
          stubs.push(sandbox.stub(element.$.restAPI,
              'getChangeFileContents',
              function() { return Promise.resolve(mockFile2); }));
          stubs.push(sandbox.stub(element.$.restAPI, '_getDiffComments',
              function() { return Promise.resolve(mockComments); }));
          stubs.push(sandbox.stub(element.$.restAPI, 'getDiffDrafts',
              function() { return Promise.resolve(mockComments); }));

          element.patchRange = {basePatchNum: 'PARENT', patchNum: 1};
        });

        test('renders image diffs with same file name', function(done) {
          var mockDiff = {
            meta_a: {name: 'carrot.jpg', content_type: 'image/jpeg', lines: 66},
            meta_b: {name: 'carrot.jpg', content_type: 'image/jpeg',
                lines: 560},
            intraline_status: 'OK',
            change_type: 'MODIFIED',
            diff_header: [
              'diff --git a/carrot.jpg b/carrot.jpg',
              'index 2adc47d..f9c2f2c 100644',
              '--- a/carrot.jpg',
              '+++ b/carrot.jpg',
              'Binary files differ',
            ],
            content: [{skip: 66}],
            binary: true,
          };
          stubs.push(sandbox.stub(element, '_getDiff',
              function() { return Promise.resolve(mockDiff); }));

          var rendered = function() {
            // Recognizes that it should be an image diff.
            assert.isTrue(element.isImageDiff);
            assert.instanceOf(
                  element.$.diffBuilder._builder, GrDiffBuilderImage);

            // Left image rendered with the parent commit's version of the file.
            var leftImage = element.$.diffTable.querySelector('td.left img');
            var leftLabel = element.$.diffTable.querySelector('td.left label');
            var leftLabelContent = leftLabel.querySelector('.label');
            var leftLabelName = leftLabel.querySelector('.name');

            var rightImage = element.$.diffTable.querySelector('td.right img');
            var rightLabel = element.$.diffTable.querySelector(
                  'td.right label');
            var rightLabelContent = rightLabel.querySelector('.label');
            var rightLabelName = rightLabel.querySelector('.name');

            assert.isNotOk(rightLabelName);
            assert.isNotOk(leftLabelName);

            var leftLoaded = false;
            var rightLoaded = false;

            leftImage.addEventListener('load', function() {
              assert.isOk(leftImage);
              assert.equal(leftImage.getAttribute('src'),
                  'data:image/bmp;base64, ' + mockFile1.body);
              assert.equal(leftLabelContent.textContent, '1⨉1 image/bmp');
              leftLoaded = true;
              if (rightLoaded) {
                element.removeEventListener('render', rendered);
                done();
              }
            });

            rightImage.addEventListener('load', function() {
              assert.isOk(rightImage);
              assert.equal(rightImage.getAttribute('src'),
                  'data:image/bmp;base64, ' + mockFile2.body);
              assert.equal(rightLabelContent.textContent, '1⨉1 image/bmp');

              rightLoaded = true;
              if (leftLoaded) {
                element.removeEventListener('render', rendered);
                done();
              }
            });

          };

          element.addEventListener('render', rendered);

          element.$.restAPI.getDiffPreferences().then(function(prefs) {
            element.prefs = prefs;
            element.reload();
          });
        });

        test('renders image diffs with a different file name', function(done) {
          var mockDiff = {
            meta_a: {name: 'carrot.jpg', content_type: 'image/jpeg', lines: 66},
            meta_b: {name: 'carrot2.jpg', content_type: 'image/jpeg',
                lines: 560},
            intraline_status: 'OK',
            change_type: 'MODIFIED',
            diff_header: [
              'diff --git a/carrot.jpg b/carrot2.jpg',
              'index 2adc47d..f9c2f2c 100644',
              '--- a/carrot.jpg',
              '+++ b/carrot2.jpg',
              'Binary files differ',
            ],
            content: [{skip: 66}],
            binary: true,
          };
          stubs.push(sandbox.stub(element, '_getDiff',
              function() { return Promise.resolve(mockDiff); }));

          var rendered = function() {
            // Recognizes that it should be an image diff.
            assert.isTrue(element.isImageDiff);
            assert.instanceOf(
                  element.$.diffBuilder._builder, GrDiffBuilderImage);

            // Left image rendered with the parent commit's version of the file.
            var leftImage = element.$.diffTable.querySelector('td.left img');
            var leftLabel = element.$.diffTable.querySelector('td.left label');
            var leftLabelContent = leftLabel.querySelector('.label');
            var leftLabelName = leftLabel.querySelector('.name');

            var rightImage = element.$.diffTable.querySelector('td.right img');
            var rightLabel = element.$.diffTable.querySelector(
                  'td.right label');
            var rightLabelContent = rightLabel.querySelector('.label');
            var rightLabelName = rightLabel.querySelector('.name');

            assert.isOk(rightLabelName);
            assert.isOk(leftLabelName);
            assert.equal(leftLabelName.textContent, mockDiff.meta_a.name);
            assert.equal(rightLabelName.textContent, mockDiff.meta_b.name);

            var leftLoaded = false;
            var rightLoaded = false;

            leftImage.addEventListener('load', function() {
              assert.isOk(leftImage);
              assert.equal(leftImage.getAttribute('src'),
                  'data:image/bmp;base64, ' + mockFile1.body);
              assert.equal(leftLabelContent.textContent, '1⨉1 image/bmp');
              leftLoaded = true;
              if (rightLoaded) {
                element.removeEventListener('render', rendered);
                done();
              }
            });

            rightImage.addEventListener('load', function() {
              assert.isOk(rightImage);
              assert.equal(rightImage.getAttribute('src'),
                  'data:image/bmp;base64, ' + mockFile2.body);
              assert.equal(rightLabelContent.textContent, '1⨉1 image/bmp');

              rightLoaded = true;
              if (leftLoaded) {
                element.removeEventListener('render', rendered);
                done();
              }
            });

          };

          element.addEventListener('render', rendered);

          element.$.restAPI.getDiffPreferences().then(function(prefs) {
            element.prefs = prefs;
            element.reload();
          });
        });

        test('renders added image', function(done) {
          var mockDiff = {
            meta_b: {name: 'carrot.jpg', content_type: 'image/jpeg',
                lines: 560},
            intraline_status: 'OK',
            change_type: 'ADDED',
            diff_header: [
              'diff --git a/carrot.jpg b/carrot.jpg',
              'index 0000000..f9c2f2c 100644',
              '--- /dev/null',
              '+++ b/carrot.jpg',
              'Binary files differ',
            ],
            content: [{skip: 66}],
            binary: true,
          };
          stubs.push(sandbox.stub(element, '_getDiff',
              function() { return Promise.resolve(mockDiff); }));

          element.addEventListener('render', function() {
            // Recognizes that it should be an image diff.
            assert.isTrue(element.isImageDiff);
            assert.instanceOf(
                element.$.diffBuilder._builder, GrDiffBuilderImage);

            var leftImage = element.$.diffTable.querySelector('td.left img');
            var rightImage = element.$.diffTable.querySelector('td.right img');

            assert.isNotOk(leftImage);
            assert.isOk(rightImage);
            done();
          });

          element.$.restAPI.getDiffPreferences().then(function(prefs) {
            element.prefs = prefs;
            element.reload();
          });
        });

        test('renders removed image', function(done) {
          var mockDiff = {
            meta_a: {name: 'carrot.jpg', content_type: 'image/jpeg',
                lines: 560},
            intraline_status: 'OK',
            change_type: 'DELETED',
            diff_header: [
              'diff --git a/carrot.jpg b/carrot.jpg',
              'index f9c2f2c..0000000 100644',
              '--- a/carrot.jpg',
              '+++ /dev/null',
              'Binary files differ',
            ],
            content: [{skip: 66}],
            binary: true,
          };
          stubs.push(sandbox.stub(element, '_getDiff',
              function() { return Promise.resolve(mockDiff); }));

          element.addEventListener('render', function() {
            // Recognizes that it should be an image diff.
            assert.isTrue(element.isImageDiff);
            assert.instanceOf(
                element.$.diffBuilder._builder, GrDiffBuilderImage);

            var leftImage = element.$.diffTable.querySelector('td.left img');
            var rightImage = element.$.diffTable.querySelector('td.right img');

            assert.isOk(leftImage);
            assert.isNotOk(rightImage);
            done();
          });

          element.$.restAPI.getDiffPreferences().then(function(prefs) {
            element.prefs = prefs;
            element.reload();
          });
        });

        test('does not render disallowed image type', function(done) {
          var mockDiff = {
            meta_a: {name: 'carrot.jpg', content_type: 'image/jpeg-evil',
                lines: 560},
            intraline_status: 'OK',
            change_type: 'DELETED',
            diff_header: [
              'diff --git a/carrot.jpg b/carrot.jpg',
              'index f9c2f2c..0000000 100644',
              '--- a/carrot.jpg',
              '+++ /dev/null',
              'Binary files differ',
            ],
            content: [{skip: 66}],
            binary: true,
          };
          mockFile1.type = 'image/jpeg-evil';

          stubs.push(sandbox.stub(element, '_getDiff',
              function() { return Promise.resolve(mockDiff); }));

          element.addEventListener('render', function() {
            // Recognizes that it should be an image diff.
            assert.isTrue(element.isImageDiff);
            assert.instanceOf(
                element.$.diffBuilder._builder, GrDiffBuilderImage);
            var leftImage = element.$.diffTable.querySelector('td.left img');
            assert.isNotOk(leftImage);
            done();
          });

          element.$.restAPI.getDiffPreferences().then(function(prefs) {
            element.prefs = prefs;
            element.reload();
          });
        });
      });

      test('_handleTap lineNum', function(done) {
        var addDraftStub = sinon.stub(element, 'addDraftAtLine');
        var el = document.createElement('div');
        el.className = 'lineNum';
        el.addEventListener('click', function(e) {
          element._handleTap(e);
          assert.isTrue(addDraftStub.called);
          assert.equal(addDraftStub.lastCall.args[0], el);
          done();
        });
        el.click();
      });

      test('_handleTap context', function(done) {
        var showContextStub = sinon.stub(element.$.diffBuilder, 'showContext');
        var el = document.createElement('div');
        el.className = 'showContext';
        el.addEventListener('click', function(e) {
          element._handleTap(e);
          assert.isTrue(showContextStub.called);
          done();
        });
        el.click();
      });

      test('_handleTap content', function(done) {
        var content = document.createElement('div');
        var lineEl = document.createElement('div');

        var selectStub = sandbox.stub(element, '_selectLine');
        var getLineStub = sandbox.stub(element.$.diffBuilder,
            'getLineElByChild', function() { return lineEl; });

        content.className = 'content';
        content.addEventListener('click', function(e) {
          element._handleTap(e);
          assert.isTrue(selectStub.called);
          assert.equal(selectStub.lastCall.args[0], lineEl);
          done();
        });
        content.click();
      });

      test('_getDiff handles null diff responses', function(done) {
        stub('gr-rest-api-interface', {
          getDiff: function() { return Promise.resolve(null); },
        });
        element.changeNum = 123;
        element.patchRange = {basePatchNum: 1, patchNum: 2};
        element.path = 'file.txt';
        element._getDiff().then(done);
      });

      suite('getCursorStops', function() {

        var setupDiff = function() {
          var mock = document.createElement('mock-diff-response');
          element._diff = mock.diffResponse;
          element._comments = {
            left: [],
            right: [],
          };
          element.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',
          };

          element._renderDiffTable();
          flushAsynchronousOperations();
        };

        test('getCursorStops returns [] when hidden and noAutoRender are true',
             function() {
          element.noAutoRender = true;
          setupDiff();
          element.hidden = true;
          assert.equal(element.getCursorStops().length, 0);
        });

        test('getCursorStops', function() {
          setupDiff();
          assert.equal(element.getCursorStops().length, 50);
        });
      });
    });

    suite('logged in', function() {
      setup(function() {
        stub('gr-rest-api-interface', {
          getLoggedIn: function() { return Promise.resolve(true); },
          getPreferences: function() {
            return Promise.resolve({time_format: 'HHMM_12'});
          },
        });
        element = fixture('basic');
      });

      test('get drafts', function(done) {
        element.patchRange = {basePatchNum: 0, patchNum: 0};
        var draftsResponse = {
          baseComments: [{id: 'foo'}],
          comments: [{id: 'bar'}],
        };
        var getDraftsStub = sandbox.stub(element.$.restAPI, 'getDiffDrafts',
            function() { return Promise.resolve(draftsResponse); });
        element._getDiffDrafts().then(function(result) {
          assert.deepEqual(result, draftsResponse);
          done();
        });
      });

      test('get comments and drafts', function(done) {
        var comments = {
          baseComments: [
            {id: 'bc1', __commentSide: 'left'},
            {id: 'bc2', __commentSide: 'left'},
          ],
          comments: [
            {id: 'c1', __commentSide: 'right'},
            {id: 'c2', __commentSide: 'right'},
          ],
        };
        var diffCommentsStub = sandbox.stub(element, '_getDiffComments',
            function() { return Promise.resolve(comments); });

        var drafts = {
          baseComments: [
            {id: 'bd1', __commentSide: 'left'},
            {id: 'bd2', __commentSide: 'left'},
          ],
          comments: [
            {id: 'd1', __commentSide: 'right'},
            {id: 'd2', __commentSide: 'right'},
          ],
        };

        var diffDraftsStub = sandbox.stub(element, '_getDiffDrafts',
            function() { return Promise.resolve(drafts); });

        var robotComments = {
          baseComments: [
            {id: 'br1', __commentSide: 'left'},
            {id: 'br2', __commentSide: 'left'},
          ],
          comments: [
            {id: 'r1', __commentSide: 'right'},
            {id: 'r2', __commentSide: 'right'},
          ],
        };

        var diffRobotCommentStub = sandbox.stub(element,
            '_getDiffRobotComments', function() {
          return Promise.resolve(robotComments); });

        element.changeNum = '42';
        element.patchRange = {
          basePatchNum: 'PARENT',
          patchNum: 3,
        };
        element.path = '/path/to/foo';
        element.projectConfig = {foo: 'bar'};

        element._getDiffCommentsAndDrafts().then(function(result) {
          assert.deepEqual(result, {
            meta: {
              changeNum: '42',
              patchRange: {
                basePatchNum: 'PARENT',
                patchNum: 3,
              },
              path: '/path/to/foo',
              projectConfig: {foo: 'bar'},
            },
            left: [
              {id: 'bc1', __commentSide: 'left'},
              {id: 'bc2', __commentSide: 'left'},
              {id: 'bd1', __draft: true, __commentSide: 'left'},
              {id: 'bd2', __draft: true, __commentSide: 'left'},
              {id: 'br1', __commentSide: 'left'},
              {id: 'br2', __commentSide: 'left'},
            ],
            right: [
              {id: 'c1', __commentSide: 'right'},
              {id: 'c2', __commentSide: 'right'},
              {id: 'd1', __draft: true, __commentSide: 'right'},
              {id: 'd2', __draft: true, __commentSide: 'right'},
              {id: 'r1', __commentSide: 'right'},
              {id: 'r2', __commentSide: 'right'},
            ],
          });

          done();
        });
      });

      test('addDraftAtLine', function(done) {
        var fakeLineEl = {getAttribute: sandbox.stub().returns(42)};
        sandbox.stub(element, '_selectLine');
        sandbox.stub(element, '_addDraft');
        var loggedInErrorSpy = sandbox.spy();
        element.addEventListener('show-auth-required', loggedInErrorSpy);
        element.addDraftAtLine(fakeLineEl);
        flush(function() {
          assert.isFalse(loggedInErrorSpy.called);
          assert.isTrue(element._addDraft.calledWithExactly(fakeLineEl, 42));
          done();
        });
      });

      suite('handle comment-update', function() {

        setup(function() {
          element._comments = {
            meta: {
              changeNum: '42',
              patchRange: {
                basePatchNum: 'PARENT',
                patchNum: 3,
              },
              path: '/path/to/foo',
              projectConfig: {foo: 'bar'},
            },
            left: [
              {id: 'bc1', side: 'PARENT', __commentSide: 'left'},
              {id: 'bc2', side: 'PARENT', __commentSide: 'left'},
              {id: 'bd1', __draft: true, side: 'PARENT', __commentSide: 'left'},
              {id: 'bd2', __draft: true, side: 'PARENT', __commentSide: 'left'},
            ],
            right: [
              {id: 'c1', __commentSide: 'right'},
              {id: 'c2', __commentSide: 'right'},
              {id: 'd1', __draft: true, __commentSide: 'right'},
              {id: 'd2', __draft: true, __commentSide: 'right'},
            ],
          };
        });

        test('creating a draft', function() {
          var comment = {__draft: true, __draftID: 'tempID', side: 'PARENT',
              __commentSide: 'left'};
          element.fire('comment-update', {comment: comment});
          assert.include(element._comments.left, comment);
        });

        test('saving a draft', function() {
          var draftID = 'tempID';
          var id = 'savedID';
          element._comments.left.push(
              {__draft: true, __draftID: draftID, side: 'PARENT',
              __commentSide: 'left'});
          element.fire('comment-update', {comment:
              {id: id, __draft: true, __draftID: draftID, side: 'PARENT',
              __commentSide: 'left'},
          });
          var drafts = element._comments.left.filter(function(item) {
            return item.__draftID === draftID;
          });
          assert.equal(drafts.length, 1);
          assert.equal(drafts[0].id, id);
        });
      });
    });

    suite('diff header', function() {
      setup(function() {
        element._diff = {
            meta_a: {name: 'carrot.jpg', content_type: 'image/jpeg', lines: 66},
            meta_b: {name: 'carrot.jpg', content_type: 'image/jpeg',
                lines: 560},
            diff_header: [],
            intraline_status: 'OK',
            change_type: 'MODIFIED',
            content: [{skip: 66}],
          };
      });

      test('hidden', function() {
        assert.equal(element._diffHeaderItems.length, 0);
        element.push('_diff.diff_header', 'diff --git a/test.jpg b/test.jpg');
        assert.equal(element._diffHeaderItems.length, 0);
        element.push('_diff.diff_header', 'index 2adc47d..f9c2f2c 100644');
        assert.equal(element._diffHeaderItems.length, 0);
        element.push('_diff.diff_header', '--- a/test.jpg');
        assert.equal(element._diffHeaderItems.length, 0);
        element.push('_diff.diff_header', '+++ b/test.jpg');
        assert.equal(element._diffHeaderItems.length, 0);
        element.push('_diff.diff_header', 'test');
        assert.equal(element._diffHeaderItems.length, 1);
        flushAsynchronousOperations();

        assert.equal(element.$.diffHeader.textContent.trim(), 'test');
        element.set('_diff.binary', true);
        assert.equal(element._diffHeaderItems.length, 0);
      });
    });
  });
</script>