<!DOCTYPE html>
<!--
Copyright (C) 2015 The Android Open Source Project

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->

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

<script src="../../../bower_components/webcomponentsjs/webcomponents-lite.min.js"></script>
<script src="../../../bower_components/web-component-tester/browser.js"></script>
<link rel="import" href="../../../test/common-test-setup.html"/>
<script src="../../../bower_components/page/page.js"></script>

<link rel="import" href="../../edit/gr-edit-constants.html">
<link rel="import" href="gr-change-view.html">

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

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

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

<script>
  suite('gr-change-view tests', () => {
    let element;
    let sandbox;
    let navigateToChangeStub;
    const TEST_SCROLL_TOP_PX = 100;

    setup(() => {
      sandbox = sinon.sandbox.create();
      navigateToChangeStub = sandbox.stub(Gerrit.Nav, 'navigateToChange');
      stub('gr-rest-api-interface', {
        getConfig() { return Promise.resolve({test: 'config'}); },
        getAccount() { return Promise.resolve(null); },
        _fetchSharedCacheURL() { return Promise.resolve({}); },
      });
      element = fixture('basic');
      sandbox.stub(element.$.actions, 'reload').returns(Promise.resolve());
    });

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

    suite('keyboard shortcuts', () => {
      setup(() => {
        sandbox.stub(element, '_updateSortedRevisions');
      });

      test('S should toggle the CL star', () => {
        const starStub = sandbox.stub(element.$.changeStar, 'toggleStar');
        MockInteractions.pressAndReleaseKeyOn(element, 83, null, 's');
        assert(starStub.called);
      });

      test('U should navigate to / if no backPage set', () => {
        const relativeNavStub = sandbox.stub(Gerrit.Nav,
            'navigateToRelativeUrl');
        MockInteractions.pressAndReleaseKeyOn(element, 85, null, 'u');
        assert.isTrue(relativeNavStub.called);
        assert.isTrue(relativeNavStub.lastCall.calledWithExactly('/'));
      });

      test('U should navigate to backPage if set', () => {
        const relativeNavStub = sandbox.stub(Gerrit.Nav,
            'navigateToRelativeUrl');
        element.backPage = '/dashboard/self';
        MockInteractions.pressAndReleaseKeyOn(element, 85, null, 'u');
        assert.isTrue(relativeNavStub.called);
        assert.isTrue(relativeNavStub.lastCall.calledWithExactly(
            '/dashboard/self'));
      });

      test('A fires an error event when not logged in', done => {
        sandbox.stub(element, '_getLoggedIn').returns(Promise.resolve(false));
        const loggedInErrorSpy = sandbox.spy();
        element.addEventListener('show-auth-required', loggedInErrorSpy);
        MockInteractions.pressAndReleaseKeyOn(element, 65, null, 'a');
        flush(() => {
          assert.isFalse(element.$.replyOverlay.opened);
          assert.isTrue(loggedInErrorSpy.called);
          done();
        });
      });

      test('shift A does not open reply overlay', done => {
        sandbox.stub(element, '_getLoggedIn').returns(Promise.resolve(true));
        MockInteractions.pressAndReleaseKeyOn(element, 65, 'shift', 'a');
        flush(() => {
          assert.isFalse(element.$.replyOverlay.opened);
          done();
        });
      });

      test('A toggles overlay when logged in', done => {
        sandbox.stub(element, '_getLoggedIn').returns(Promise.resolve(true));
        sandbox.stub(element.$.replyDialog, 'fetchIsLatestKnown')
            .returns(Promise.resolve(true));
        element._change = {labels: {}};
        MockInteractions.pressAndReleaseKeyOn(element, 65, null, 'a');
        flush(() => {
          assert.isTrue(element.$.replyOverlay.opened);
          element.$.replyOverlay.close();
          assert.isFalse(element.$.replyOverlay.opened);
          done();
        });
      });

      test('fullscreen-overlay-opened hides content', () => {
        element._loggedIn = true;
        element._loading = false;
        element._change = {
          owner: {_account_id: 1},
          labels: {},
          actions: {
            abandon: {
              enabled: true,
              label: 'Abandon',
              method: 'POST',
              title: 'Abandon',
            },
          },
        };
        sandbox.spy(element, '_handleHideBackgroundContent');
        element.$.replyDialog.fire('fullscreen-overlay-opened');
        assert.isTrue(element._handleHideBackgroundContent.called);
        assert.isTrue(element.$.mainContent.classList.contains('overlayOpen'));
        assert.equal(getComputedStyle(element.$.actions).display, 'flex');
      });

      test('fullscreen-overlay-closed shows content', () => {
        element._loggedIn = true;
        element._loading = false;
        element._change = {
          owner: {_account_id: 1},
          labels: {},
          actions: {
            abandon: {
              enabled: true,
              label: 'Abandon',
              method: 'POST',
              title: 'Abandon',
            },
          },
        };
        sandbox.spy(element, '_handleShowBackgroundContent');
        element.$.replyDialog.fire('fullscreen-overlay-closed');
        assert.isTrue(element._handleShowBackgroundContent.called);
        assert.isFalse(element.$.mainContent.classList.contains('overlayOpen'));
      });

      test('expand all messages when expand-diffs fired', () => {
        const handleExpand =
            sandbox.stub(element.$.fileList, 'expandAllDiffs');
        element.$.fileListHeader.fire('expand-diffs');
        assert.isTrue(handleExpand.called);
      });

      test('collapse all messages when collapse-diffs fired', () => {
        const handleCollapse =
        sandbox.stub(element.$.fileList, 'collapseAllDiffs');
        element.$.fileListHeader.fire('collapse-diffs');
        assert.isTrue(handleCollapse.called);
      });

      test('X should expand all messages', () => {
        const handleExpand =
            sandbox.stub(element.$.messageList, 'handleExpandCollapse');
        MockInteractions.pressAndReleaseKeyOn(element, 88, null, 'x');
        assert(handleExpand.calledWith(true));
      });

      test('Z should collapse all messages', () => {
        const handleExpand =
            sandbox.stub(element.$.messageList, 'handleExpandCollapse');
        MockInteractions.pressAndReleaseKeyOn(element, 90, null, 'z');
        assert(handleExpand.calledWith(false));
      });

      test('shift + R should fetch and navigate to the latest patch set',
          done => {
            element._changeNum = '42';
            element._patchRange = {
              basePatchNum: 'PARENT',
              patchNum: 1,
            };
            element._change = {
              change_id: 'Iad9dc96274af6946f3632be53b106ef80f7ba6ca',
              _number: 42,
              revisions: {
                rev1: {_number: 1},
              },
              current_revision: 'rev1',
              status: 'NEW',
              labels: {},
              actions: {},
            };

            navigateToChangeStub.restore();
            navigateToChangeStub = sandbox.stub(Gerrit.Nav, 'navigateToChange',
                (change, patchNum, basePatchNum) => {
                  assert.equal(change, element._change);
                  assert.isUndefined(patchNum);
                  assert.isUndefined(basePatchNum);
                  done();
                });

            MockInteractions.pressAndReleaseKeyOn(element, 82, 'shift', 'r');
          });

      test('d should open download overlay', () => {
        const stub = sandbox.stub(element.$.downloadOverlay, 'open');
        MockInteractions.pressAndReleaseKeyOn(element, 68, null, 'd');
        assert.isTrue(stub.called);
      });

      test(', should open diff preferences', () => {
        const stub = sandbox.stub(element.$.fileList.$.diffPreferences, 'open');
        MockInteractions.pressAndReleaseKeyOn(element, 188, null, ',');
        assert.isTrue(stub.called);
      });
    });

    test('download tap calls _handleOpenDownloadDialog', () => {
      sandbox.stub(element, '_handleOpenDownloadDialog');
      element.$.actions.fire('download-tap');
      assert.isTrue(element._handleOpenDownloadDialog.called);
    });

    test('fetches the server config on attached', done => {
      flush(() => {
        assert.equal(element._serverConfig.test, 'config');
        done();
      });
    });

    test('_changeStatuses', () => {
      sandbox.stub(element, 'changeStatuses').returns(
          ['Merged', 'WIP']);
      element._loading = false;
      element._change = {
        change_id: 'Iad9dc96274af6946f3632be53b106ef80f7ba6ca',
        revisions: {
          rev2: {_number: 2},
          rev1: {_number: 1},
          rev13: {_number: 13},
          rev3: {_number: 3},
        },
        current_revision: 'rev3',
        labels: {
          test: {
            all: [],
            default_value: 0,
            values: [],
            approved: {},
          },
        },
      };
      expectedStatuses = ['Merged', 'WIP'];
      assert.deepEqual(element._changeStatuses, expectedStatuses);
      assert.equal(element._changeStatus, expectedStatuses.join(', '));
      flushAsynchronousOperations();
      const statusChips = Polymer.dom(element.root)
          .querySelectorAll('gr-change-status');
      assert.equal(statusChips.length, 2);
    });

    test('diff preferences open when open-diff-prefs is fired', () => {
      const overlayOpenStub = sandbox.stub(element.$.fileList,
          'openDiffPrefs');
      element.$.fileListHeader.fire('open-diff-prefs');
      assert.isTrue(overlayOpenStub.called);
    });

    test('_prepareCommitMsgForLinkify', () => {
      let commitMessage = 'R=test@google.com';
      let result = element._prepareCommitMsgForLinkify(commitMessage);
      assert.equal(result, 'R=\u200Btest@google.com');

      commitMessage = 'R=test@google.com\nR=test@google.com';
      result = element._prepareCommitMsgForLinkify(commitMessage);
      assert.equal(result, 'R=\u200Btest@google.com\nR=\u200Btest@google.com');

      commitMessage = 'CC=test@google.com';
      result = element._prepareCommitMsgForLinkify(commitMessage);
      assert.equal(result, 'CC=\u200Btest@google.com');
    }),

    test('_updateRebaseAction', () => {
      const currentRevisionActions = {
        cherrypick: {
          enabled: true,
          label: 'Cherry Pick',
          method: 'POST',
          title: 'cherrypick',
        },
        rebase: {
          enabled: true,
          label: 'Rebase',
          method: 'POST',
          title: 'Rebase onto tip of branch or parent change',
        },
      };

      // Rebase enabled should always end up true.
      // When rebase is enabled initially, rebaseOnCurrent should be set to
      // true.
      assert.equal(element._updateRebaseAction(currentRevisionActions),
          currentRevisionActions);

      assert.isTrue(currentRevisionActions.rebase.enabled);
      assert.isTrue(currentRevisionActions.rebase.rebaseOnCurrent);

      delete currentRevisionActions.rebase.enabled;

      // When rebase is not enabled initially, rebaseOnCurrent should be set to
      // false.
      assert.equal(element._updateRebaseAction(currentRevisionActions),
          currentRevisionActions);

      assert.isTrue(currentRevisionActions.rebase.enabled);
      assert.isFalse(currentRevisionActions.rebase.rebaseOnCurrent);
    });

    test('_reload is called when an approved label is removed', () => {
      const vote = {_account_id: 1, name: 'bojack', value: 1};
      element._changeNum = '42';
      element._patchRange = {
        basePatchNum: 'PARENT',
        patchNum: 1,
      };
      element._change = {
        change_id: 'Iad9dc96274af6946f3632be53b106ef80f7ba6ca',
        revisions: {
          rev2: {_number: 2},
          rev1: {_number: 1},
          rev13: {_number: 13},
          rev3: {_number: 3},
        },
        current_revision: 'rev3',
        status: 'NEW',
        labels: {
          test: {
            all: [vote],
            default_value: 0,
            values: [],
            approved: {},
          },
        },
      };
      flushAsynchronousOperations();
      const reloadStub = sandbox.stub(element, '_reload');
      element.splice('_change.labels.test.all', 0, 1);
      assert.isFalse(reloadStub.called);
      element._change.labels.test.all.push(vote);
      element._change.labels.test.all.push(vote);
      element._change.labels.test.approved = vote;
      flushAsynchronousOperations();
      element.splice('_change.labels.test.all', 0, 2);
      assert.isTrue(reloadStub.called);
      assert.isTrue(reloadStub.calledOnce);
    });

    test('reply button has updated count when there are drafts', () => {
      const getLabel = element._computeReplyButtonLabel;

      assert.equal(getLabel(null, false), 'Reply');
      assert.equal(getLabel(null, true), 'Start review');

      const changeRecord = {base: null};
      assert.equal(getLabel(changeRecord, false), 'Reply');

      changeRecord.base = {};
      assert.equal(getLabel(changeRecord, false), 'Reply');

      changeRecord.base = {
        'file1.txt': [{}],
        'file2.txt': [{}, {}],
      };
      assert.equal(getLabel(changeRecord, false), 'Reply (3)');
    });

    test('start review button when owner of WIP change', () => {
      assert.equal(
          element._computeReplyButtonLabel(null, true),
          'Start review');
    });

    test('comment events properly update diff drafts', () => {
      element._patchRange = {
        basePatchNum: 'PARENT',
        patchNum: 2,
      };
      const draft = {
        __draft: true,
        id: 'id1',
        path: '/foo/bar.txt',
        text: 'hello',
      };
      element._handleCommentSave({target: {comment: draft}});
      draft.patch_set = 2;
      assert.deepEqual(element._diffDrafts, {'/foo/bar.txt': [draft]});
      draft.patch_set = null;
      draft.text = 'hello, there';
      element._handleCommentSave({target: {comment: draft}});
      draft.patch_set = 2;
      assert.deepEqual(element._diffDrafts, {'/foo/bar.txt': [draft]});
      const draft2 = {
        __draft: true,
        id: 'id2',
        path: '/foo/bar.txt',
        text: 'hola',
      };
      element._handleCommentSave({target: {comment: draft2}});
      draft2.patch_set = 2;
      assert.deepEqual(element._diffDrafts, {'/foo/bar.txt': [draft, draft2]});
      draft.patch_set = null;
      element._handleCommentDiscard({target: {comment: draft}});
      draft.patch_set = 2;
      assert.deepEqual(element._diffDrafts, {'/foo/bar.txt': [draft2]});
      element._handleCommentDiscard({target: {comment: draft2}});
      assert.deepEqual(element._diffDrafts, {});
    });

    test('change num change', () => {
      sandbox.stub(element, '_updateSortedRevisions');
      element._changeNum = null;
      element._patchRange = {
        basePatchNum: 'PARENT',
        patchNum: 2,
      };
      element._change = {
        change_id: 'Iad9dc96274af6946f3632be53b106ef80f7ba6ca',
        labels: {},
      };
      element.viewState.changeNum = null;
      element.viewState.diffMode = 'UNIFIED';
      assert.equal(element.viewState.numFilesShown, 200);
      assert.equal(element._numFilesShown, 200);
      element._numFilesShown = 150;
      flushAsynchronousOperations();
      assert.equal(element.viewState.diffMode, 'UNIFIED');
      assert.equal(element.viewState.numFilesShown, 150);

      element._changeNum = '1';
      element.params = {changeNum: '1'};
      element._change.newProp = '1';
      flushAsynchronousOperations();
      assert.equal(element.viewState.diffMode, 'UNIFIED');
      assert.equal(element.viewState.changeNum, '1');

      element._changeNum = '2';
      element.params = {changeNum: '2'};
      element._change.newProp = '2';
      flushAsynchronousOperations();
      assert.equal(element.viewState.diffMode, 'UNIFIED');
      assert.equal(element.viewState.changeNum, '2');
      assert.equal(element.viewState.numFilesShown, 200);
      assert.equal(element._numFilesShown, 200);
    });

    test('_setDiffViewMode is called with reset when new change is loaded',
        () => {
          sandbox.stub(element, '_setDiffViewMode');
          element.viewState = {changeNum: 1};
          element._changeNum = 2;
          element._resetFileListViewState();
          assert.isTrue(
              element._setDiffViewMode.lastCall.calledWithExactly(true));
        });

    test('diffViewMode is propagated from file list header', () => {
      element.viewState = {diffMode: 'UNIFIED'};
      element.$.fileListHeader.diffViewMode = 'SIDE_BY_SIDE';
      assert.equal(element.viewState.diffMode, 'SIDE_BY_SIDE');
    });

    test('diffMode defaults to side by side without preferences', done => {
      sandbox.stub(element.$.restAPI, 'getPreferences').returns(
          Promise.resolve({}));
      // No user prefs or diff view mode set.

      element._setDiffViewMode().then(() => {
        assert.equal(element.viewState.diffMode, 'SIDE_BY_SIDE');
        done();
      });
    });

    test('diffMode defaults to preference when not already set', done => {
      sandbox.stub(element.$.restAPI, 'getPreferences').returns(
          Promise.resolve({default_diff_view: 'UNIFIED'}));

      element._setDiffViewMode().then(() => {
        assert.equal(element.viewState.diffMode, 'UNIFIED');
        done();
      });
    });

    test('existing diffMode overrides preference', done => {
      element.viewState.diffMode = 'SIDE_BY_SIDE';
      sandbox.stub(element.$.restAPI, 'getPreferences').returns(
          Promise.resolve({default_diff_view: 'UNIFIED'}));
      element._setDiffViewMode().then(() => {
        assert.equal(element.viewState.diffMode, 'SIDE_BY_SIDE');
        done();
      });
    });

    test('don’t reload entire page when patchRange changes', () => {
      const reloadStub = sandbox.stub(element, '_reload',
          () => { return Promise.resolve(); });
      const reloadPatchDependentStub = sandbox.stub(element,
          '_reloadPatchNumDependentResources',
          () => { return Promise.resolve(); });
      const relatedClearSpy = sandbox.spy(element.$.relatedChanges, 'clear');
      const collapseStub = sandbox.stub(element.$.fileList, 'collapseAllDiffs');

      const value = {
        view: Gerrit.Nav.View.CHANGE,
        patchNum: '1',
      };
      element._paramsChanged(value);
      assert.isTrue(reloadStub.calledOnce);
      assert.isTrue(relatedClearSpy.calledOnce);

      element._initialLoadComplete = true;

      value.basePatchNum = '1';
      value.patchNum = '2';
      element._paramsChanged(value);
      assert.isFalse(reloadStub.calledTwice);
      assert.isTrue(reloadPatchDependentStub.calledOnce);
      assert.isTrue(relatedClearSpy.calledOnce);
      assert.isTrue(collapseStub.calledTwice);
    });

    test('reload entire page when patchRange doesnt change', () => {
      const reloadStub = sandbox.stub(element, '_reload',
          () => { return Promise.resolve(); });
      const collapseStub = sandbox.stub(element.$.fileList, 'collapseAllDiffs');
      const value = {
        view: Gerrit.Nav.View.CHANGE,
      };
      element._paramsChanged(value);
      assert.isTrue(reloadStub.calledOnce);
      element._initialLoadComplete = true;
      element._paramsChanged(value);
      assert.isTrue(reloadStub.calledTwice);
      assert.isTrue(collapseStub.calledTwice);
    });

    test('related changes are updated and new patch selected after rebase',
        done => {
          element._changeNum = '42';
          sandbox.stub(element, 'computeLatestPatchNum', () => {
            return 1;
          });
          sandbox.stub(element, '_reload',
              () => { return Promise.resolve(); });
          const e = {detail: {action: 'rebase'}};
          element._handleReloadChange(e).then(() => {
            assert.isTrue(navigateToChangeStub.lastCall.calledWithExactly(
                element._change));
            done();
          });
        });

    test('related changes are not updated after other action', done => {
      sandbox.stub(element, '_reload', () => { return Promise.resolve(); });
      sandbox.stub(element.$.relatedChanges, 'reload');
      const e = {detail: {action: 'abandon'}};
      element._handleReloadChange(e).then(() => {
        assert.isFalse(navigateToChangeStub.called);
        done();
      });
    });

    test('_computeMergedCommitInfo', () => {
      const dummyRevs = {
        1: {commit: {commit: 1}},
        2: {commit: {}},
      };
      assert.deepEqual(element._computeMergedCommitInfo(0, dummyRevs), {});
      assert.deepEqual(element._computeMergedCommitInfo(1, dummyRevs),
          dummyRevs[1].commit);

      // Regression test for issue 5337.
      const commit = element._computeMergedCommitInfo(2, dummyRevs);
      assert.notDeepEqual(commit, dummyRevs[2]);
      assert.deepEqual(commit, {commit: 2});
    });

    test('get latest revision', () => {
      let change = {
        revisions: {
          rev1: {_number: 1},
          rev3: {_number: 3},
        },
        current_revision: 'rev3',
      };
      assert.equal(element._getLatestRevisionSHA(change), 'rev3');
      change = {
        revisions: {
          rev1: {_number: 1},
        },
      };
      assert.equal(element._getLatestRevisionSHA(change), 'rev1');
    });

    test('show commit message edit button', () => {
      const _change = {
        status: element.ChangeStatus.MERGED,
      };
      assert.isTrue(element._computeHideEditCommitMessage(false, false, {}));
      assert.isTrue(element._computeHideEditCommitMessage(true, true, {}));
      assert.isTrue(element._computeHideEditCommitMessage(false, true, {}));
      assert.isFalse(element._computeHideEditCommitMessage(true, false, {}));
      assert.isTrue(element._computeHideEditCommitMessage(true, false,
          _change));
    });

    test('_computeChangeIdCommitMessageError', () => {
      let commitMessage =
        'Change-Id: I4ce18b2395bca69d7a9aa48bf4554faa56282483';
      let change = {change_id: 'I4ce18b2395bca69d7a9aa48bf4554faa56282483'};
      assert.equal(
          element._computeChangeIdCommitMessageError(commitMessage, change),
          null);

      change = {change_id: 'I4ce18b2395bca69d7a9aa48bf4554faa56282484'};
      assert.equal(
          element._computeChangeIdCommitMessageError(commitMessage, change),
          'mismatch');

      commitMessage = 'This is the greatest change.';
      assert.equal(
          element._computeChangeIdCommitMessageError(commitMessage, change),
          'missing');
    });

    test('multiple change Ids in commit message picks last', () => {
      const commitMessage = [
        'Change-Id: I4ce18b2395bca69d7a9aa48bf4554faa56282484',
        'Change-Id: I4ce18b2395bca69d7a9aa48bf4554faa56282483',
      ].join('\n');
      let change = {change_id: 'I4ce18b2395bca69d7a9aa48bf4554faa56282483'};
      assert.equal(
          element._computeChangeIdCommitMessageError(commitMessage, change),
          null);
      change = {change_id: 'I4ce18b2395bca69d7a9aa48bf4554faa56282484'};
      assert.equal(
          element._computeChangeIdCommitMessageError(commitMessage, change),
          'mismatch');
    });

    test('does not count change Id that starts mid line', () => {
      const commitMessage = [
        'Change-Id: I4ce18b2395bca69d7a9aa48bf4554faa56282484',
        'Change-Id: I4ce18b2395bca69d7a9aa48bf4554faa56282483',
      ].join(' and ');
      let change = {change_id: 'I4ce18b2395bca69d7a9aa48bf4554faa56282484'};
      assert.equal(
          element._computeChangeIdCommitMessageError(commitMessage, change),
          null);
      change = {change_id: 'I4ce18b2395bca69d7a9aa48bf4554faa56282483'};
      assert.equal(
          element._computeChangeIdCommitMessageError(commitMessage, change),
          'mismatch');
    });

    test('_computeTitleAttributeWarning', () => {
      let changeIdCommitMessageError = 'missing';
      assert.equal(
          element._computeTitleAttributeWarning(changeIdCommitMessageError),
          'No Change-Id in commit message');

      changeIdCommitMessageError = 'mismatch';
      assert.equal(
          element._computeTitleAttributeWarning(changeIdCommitMessageError),
          'Change-Id mismatch');
    });

    test('_computeChangeIdClass', () => {
      let changeIdCommitMessageError = 'missing';
      assert.equal(
          element._computeChangeIdClass(changeIdCommitMessageError), '');

      changeIdCommitMessageError = 'mismatch';
      assert.equal(
          element._computeChangeIdClass(changeIdCommitMessageError), 'warning');
    });

    test('topic is coalesced to null', done => {
      sandbox.stub(element, '_changeChanged');
      sandbox.stub(element.$.restAPI, 'getChangeDetail', () => {
        return Promise.resolve({
          id: '123456789',
          labels: {},
          current_revision: 'foo',
          revisions: {foo: {commit: {}}},
        });
      });

      element._getChangeDetail().then(() => {
        assert.isNull(element._change.topic);
        done();
      });
    });

    test('commit sha is populated from getChangeDetail', done => {
      sandbox.stub(element, '_changeChanged');
      sandbox.stub(element.$.restAPI, 'getChangeDetail', () => {
        return Promise.resolve({
          id: '123456789',
          labels: {},
          current_revision: 'foo',
          revisions: {foo: {commit: {}}},
        });
      });

      element._getChangeDetail().then(() => {
        assert.equal('foo', element._commitInfo.commit);
        done();
      });
    });

    test('edit is added to change', () => {
      sandbox.stub(element, '_changeChanged');
      sandbox.stub(element.$.restAPI, 'getChangeDetail', () => {
        return Promise.resolve({
          id: '123456789',
          labels: {},
          current_revision: 'foo',
          revisions: {foo: {commit: {}}},
        });
      });
      sandbox.stub(element, '_getEdit', () => {
        return Promise.resolve({
          base_patch_set_number: 1,
          commit: {commit: 'bar'},
        });
      });
      element._patchRange = {};

      return element._getChangeDetail().then(() => {
        const revs = element._change.revisions;
        assert.equal(Object.keys(revs).length, 2);
        assert.deepEqual(revs['foo'], {commit: {commit: 'foo'}});
        assert.deepEqual(revs['bar'], {
          _number: element.EDIT_NAME,
          basePatchNum: 1,
          commit: {commit: 'bar'},
          fetch: undefined,
        });
      });
    });

    test('reply dialog focus can be controlled', () => {
      const FocusTarget = element.$.replyDialog.FocusTarget;
      const openStub = sandbox.stub(element, '_openReplyDialog');

      const e = {detail: {}};
      element._handleShowReplyDialog(e);
      assert(openStub.lastCall.calledWithExactly(FocusTarget.REVIEWERS),
          '_openReplyDialog should have been passed REVIEWERS');

      e.detail.value = {ccsOnly: true};
      element._handleShowReplyDialog(e);
      assert(openStub.lastCall.calledWithExactly(FocusTarget.CCS),
          '_openReplyDialog should have been passed CCS');
    });

    test('getUrlParameter functionality', () => {
      const locationStub = sandbox.stub(element, '_getLocationSearch');

      locationStub.returns('?test');
      assert.equal(element._getUrlParameter('test'), 'test');
      locationStub.returns('?test2=12&test=3');
      assert.equal(element._getUrlParameter('test'), 'test');
      locationStub.returns('');
      assert.isNull(element._getUrlParameter('test'));
      locationStub.returns('?');
      assert.isNull(element._getUrlParameter('test'));
      locationStub.returns('?test2');
      assert.isNull(element._getUrlParameter('test'));
    });

    test('revert dialog opened with revert param', done => {
      sandbox.stub(element.$.restAPI, 'getLoggedIn', () => {
        return Promise.resolve(true);
      });
      sandbox.stub(Gerrit, 'awaitPluginsLoaded', () => {
        return Promise.resolve();
      });

      element._patchRange = {
        basePatchNum: 'PARENT',
        patchNum: 2,
      };
      element._change = {
        change_id: 'Iad9dc96274af6946f3632be53b106ef80f7ba6ca',
        revisions: {
          rev1: {_number: 1},
          rev2: {_number: 2},
        },
        current_revision: 'rev1',
        status: element.ChangeStatus.MERGED,
        labels: {},
        actions: {},
      };

      sandbox.stub(element, '_getUrlParameter',
          param => {
            assert.equal(param, 'revert');
            return param;
          });

      sandbox.stub(element.$.actions, 'showRevertDialog',
          done);

      element._maybeShowRevertDialog();
      assert.isTrue(Gerrit.awaitPluginsLoaded.called);
    });

    suite('scroll related tests', () => {
      test('document scrolling calls function to set scroll height', done => {
        const originalHeight = document.body.scrollHeight;
        const scrollStub = sandbox.stub(element, '_handleScroll',
            () => {
              assert.isTrue(scrollStub.called);
              document.body.style.height = originalHeight + 'px';
              scrollStub.restore();
              done();
            });
        document.body.style.height = '10000px';
        element._handleScroll();
      });

      test('scrollTop is set correctly', () => {
        element.viewState = {scrollTop: TEST_SCROLL_TOP_PX};

        sandbox.stub(element, '_reload', () => {
          // When element is reloaded, ensure that the history
          // state has the scrollTop set earlier. This will then
          // be reset.
          assert.isTrue(element.viewState.scrollTop == TEST_SCROLL_TOP_PX);
          return Promise.resolve({});
        });

        // simulate reloading component, which is done when route
        // changes to match a regex of change view type.
        element._paramsChanged({view: Gerrit.Nav.View.CHANGE});
      });

      test('scrollTop is reset when new change is loaded', () => {
        element._resetFileListViewState();
        assert.equal(element.viewState.scrollTop, 0);
      });
    });

    suite('reply dialog tests', () => {
      setup(() => {
        sandbox.stub(element.$.replyDialog, '_draftChanged');
        sandbox.stub(element, '_updateSortedRevisions');
        sandbox.stub(element.$.replyDialog, 'fetchIsLatestKnown',
            () => { return Promise.resolve(true); });
        element._change = {labels: {}};
      });

      test('reply from comment adds quote text', () => {
        const e = {detail: {message: {message: 'quote text'}}};
        element._handleMessageReply(e);
        assert.equal(element.$.replyDialog.draft, '> quote text\n\n');
        assert.equal(element.$.replyDialog.quote, '> quote text\n\n');
      });

      test('reply from comment replaces quote text', () => {
        element.$.replyDialog.draft = '> old quote text\n\n some draft text';
        element.$.replyDialog.quote = '> old quote text\n\n';
        const e = {detail: {message: {message: 'quote text'}}};
        element._handleMessageReply(e);
        assert.equal(element.$.replyDialog.draft, '> quote text\n\n');
        assert.equal(element.$.replyDialog.quote, '> quote text\n\n');
      });

      test('reply from same comment preserves quote text', () => {
        element.$.replyDialog.draft = '> quote text\n\n some draft text';
        element.$.replyDialog.quote = '> quote text\n\n';
        const e = {detail: {message: {message: 'quote text'}}};
        element._handleMessageReply(e);
        assert.equal(element.$.replyDialog.draft,
            '> quote text\n\n some draft text');
        assert.equal(element.$.replyDialog.quote, '> quote text\n\n');
      });

      test('reply from top of page contains previous draft', () => {
        const div = document.createElement('div');
        element.$.replyDialog.draft = '> quote text\n\n some draft text';
        element.$.replyDialog.quote = '> quote text\n\n';
        const e = {target: div, preventDefault: sandbox.spy()};
        element._handleReplyTap(e);
        assert.equal(element.$.replyDialog.draft,
            '> quote text\n\n some draft text');
        assert.equal(element.$.replyDialog.quote, '> quote text\n\n');
      });
    });

    test('reply button is disabled until server config is loaded', () => {
      assert.isTrue(element._replyDisabled);
      element._serverConfig = {};
      assert.isFalse(element._replyDisabled);
    });

    suite('commit message expand/collapse', () => {
      setup(() => {
        sandbox.stub(element, 'fetchIsLatestKnown',
            () => { return Promise.resolve(false); });
      });

      test('commitCollapseToggle hidden for short commit message', () => {
        element._latestCommitMessage = '';
        assert.isTrue(element.$.commitCollapseToggle.hasAttribute('hidden'));
      });

      test('commitCollapseToggle shown for long commit message', () => {
        element._latestCommitMessage = _.times(31, String).join('\n');
        assert.isFalse(element.$.commitCollapseToggle.hasAttribute('hidden'));
      });

      test('commitCollapseToggle functions', () => {
        element._latestCommitMessage = _.times(31, String).join('\n');
        assert.isTrue(element._commitCollapsed);
        assert.isTrue(
            element.$.commitMessage.classList.contains('collapsed'));
        MockInteractions.tap(element.$.commitCollapseToggleButton);
        assert.isFalse(element._commitCollapsed);
        assert.isFalse(
            element.$.commitMessage.classList.contains('collapsed'));
      });
    });

    suite('related changes expand/collapse', () => {
      let updateHeightSpy;
      setup(() => {
        updateHeightSpy = sandbox.spy(element, '_updateRelatedChangeMaxHeight');
      });

      test('relatedChangesToggle shown height greater than changeInfo height',
          () => {
            assert.isFalse(element.$.relatedChangesToggle.classList
                .contains('showToggle'));
            sandbox.stub(element, '_getOffsetHeight', () => 50);
            sandbox.stub(element, '_getScrollHeight', () => 60);
            sandbox.stub(element, '_getLineHeight', () => 5);
            sandbox.stub(window, 'matchMedia', () => ({matches: true}));
            element._relatedChangesLoading = false;
            assert.isTrue(element.$.relatedChangesToggle.classList
                .contains('showToggle'));
            assert.equal(updateHeightSpy.callCount, 1);
          });

      test('relatedChangesToggle hidden height less than changeInfo height',
          () => {
            assert.isFalse(element.$.relatedChangesToggle.classList
                .contains('showToggle'));
            sandbox.stub(element, '_getOffsetHeight', () => 50);
            sandbox.stub(element, '_getScrollHeight', () => 40);
            sandbox.stub(element, '_getLineHeight', () => 5);
            sandbox.stub(window, 'matchMedia', () => ({matches: true}));
            element._relatedChangesLoading = false;
            assert.isFalse(element.$.relatedChangesToggle.classList
                .contains('showToggle'));
            assert.equal(updateHeightSpy.callCount, 1);
          });

      test('relatedChangesToggle functions', () => {
        sandbox.stub(element, '_getOffsetHeight', () => 50);
        sandbox.stub(window, 'matchMedia', () => ({matches: false}));
        element._relatedChangesLoading = false;
        assert.isTrue(element._relatedChangesCollapsed);
        assert.isTrue(
            element.$.relatedChanges.classList.contains('collapsed'));
        MockInteractions.tap(element.$.relatedChangesToggleButton);
        assert.isFalse(element._relatedChangesCollapsed);
        assert.isFalse(
            element.$.relatedChanges.classList.contains('collapsed'));
      });

      test('_updateRelatedChangeMaxHeight without commit toggle', () => {
        sandbox.stub(element, '_getOffsetHeight', () => 50);
        sandbox.stub(element, '_getLineHeight', () => 12);
        sandbox.stub(window, 'matchMedia', () => ({matches: false}));

        // 50 (existing height) - 30 (extra height) = 20 (adjusted height).
        // 20 (max existing height)  % 12 (line height) = 6 (remainder).
        // 20 (adjusted height) - 8 (remainder) = 12 (max height to set).

        element._updateRelatedChangeMaxHeight();
        assert.equal(element.customStyle['--relation-chain-max-height'],
            '12px');
        assert.equal(element.customStyle['--related-change-btn-top-padding'],
            undefined);
      });

      test('_updateRelatedChangeMaxHeight with commit toggle', () => {
        element._latestCommitMessage = _.times(31, String).join('\n');
        sandbox.stub(element, '_getOffsetHeight', () => 50);
        sandbox.stub(element, '_getLineHeight', () => 12);
        sandbox.stub(window, 'matchMedia', () => ({matches: false}));

        // 50 (existing height) % 12 (line height) = 2 (remainder).
        // 50 (existing height)  - 2 (remainder) = 48 (max height to set).

        element._updateRelatedChangeMaxHeight();
        assert.equal(element.customStyle['--relation-chain-max-height'],
            '48px');
        assert.equal(element.customStyle['--related-change-btn-top-padding'],
            '2px');
      });

      test('_updateRelatedChangeMaxHeight in small screen mode', () => {
        element._latestCommitMessage = _.times(31, String).join('\n');
        sandbox.stub(element, '_getOffsetHeight', () => 50);
        sandbox.stub(element, '_getLineHeight', () => 12);
        sandbox.stub(window, 'matchMedia', () => ({matches: true}));

        element._updateRelatedChangeMaxHeight();

        // 400 (new height) % 12 (line height) = 4 (remainder).
        // 400 (new height) - 4 (remainder) = 396.

        assert.equal(element.customStyle['--relation-chain-max-height'],
            '396px');
      });

      test('_updateRelatedChangeMaxHeight in medium screen mode', () => {
        element._latestCommitMessage = _.times(31, String).join('\n');
        sandbox.stub(element, '_getOffsetHeight', () => 50);
        sandbox.stub(element, '_getLineHeight', () => 12);
        sandbox.stub(window, 'matchMedia', () => {
          if (window.matchMedia.lastCall.args[0] === '(max-width: 60em)') {
            return {matches: true};
          } else {
            return {matches: false};
          }
        });

        // 100 (new height) % 12 (line height) = 4 (remainder).
        // 100 (new height) - 4 (remainder) = 96.
        element._updateRelatedChangeMaxHeight();
        assert.equal(element.customStyle['--relation-chain-max-height'],
            '96px');
      });


      suite('update checks', () => {
        setup(() => {
          sandbox.spy(element, '_startUpdateCheckTimer');
          sandbox.stub(element, 'async', f => {
            // Only fire the async callback one time.
            if (element.async.callCount > 1) { return; }
            f.call(element);
          });
        });

        test('_startUpdateCheckTimer negative delay', () => {
          sandbox.stub(element, 'fetchIsLatestKnown');

          element._serverConfig = {change: {update_delay: -1}};

          assert.isTrue(element._startUpdateCheckTimer.called);
          assert.isFalse(element.fetchIsLatestKnown.called);
        });

        test('_startUpdateCheckTimer up-to-date', () => {
          sandbox.stub(element, 'fetchIsLatestKnown',
              () => { return Promise.resolve(true); });

          element._serverConfig = {change: {update_delay: 12345}};

          assert.isTrue(element._startUpdateCheckTimer.called);
          assert.isTrue(element.fetchIsLatestKnown.called);
          assert.equal(element.async.lastCall.args[1], 12345 * 1000);
        });

        test('_startUpdateCheckTimer out-of-date shows an alert', done => {
          sandbox.stub(element, 'fetchIsLatestKnown',
              () => { return Promise.resolve(false); });
          element.addEventListener('show-alert', () => {
            done();
          });
          element._serverConfig = {change: {update_delay: 12345}};
        });
      });

      test('canStartReview computation', () => {
        const account1 = {_account_id: 1};
        const account2 = {_account_id: 2};
        const change = {
          owner: {_account_id: 1},
        };
        assert.isFalse(element._computeCanStartReview(true, change, account1));
        change.work_in_progress = false;
        assert.isFalse(element._computeCanStartReview(true, change, account1));
        change.work_in_progress = true;
        assert.isTrue(element._computeCanStartReview(true, change, account1));
        assert.isFalse(element._computeCanStartReview(false, change, account1));
        assert.isFalse(element._computeCanStartReview(true, change, account2));
      });

      test('header class computation', () => {
        assert.equal(element._computeHeaderClass({}), 'header');
        assert.equal(element._computeHeaderClass({work_in_progress: true}),
            'header wip');
      });
    });

    test('_maybeScrollToMessage', () => {
      const scrollStub = sandbox.stub(element.$.messageList, 'scrollToMessage');

      element._maybeScrollToMessage('');
      assert.isFalse(scrollStub.called);

      element._maybeScrollToMessage('message');
      assert.isFalse(scrollStub.called);

      element._maybeScrollToMessage('#message-TEST');
      assert.isTrue(scrollStub.called);
      assert.equal(scrollStub.lastCall.args[0], 'TEST');
    });

    test('topic update reloads related changes', () => {
      sandbox.stub(element.$.relatedChanges, 'reload');
      element.dispatchEvent(new CustomEvent('topic-changed'));
      assert.isTrue(element.$.relatedChanges.reload.calledOnce);
    });

    test('_computeEditLoaded', () => {
      const callCompute = range => element._computeEditLoaded({base: range});
      assert.isFalse(callCompute({}));
      assert.isFalse(callCompute({basePatchNum: 'PARENT', patchNum: 1}));
      assert.isFalse(callCompute({basePatchNum: 'edit', patchNum: 1}));
      assert.isTrue(callCompute({basePatchNum: 1, patchNum: 'edit'}));
    });

    test('_processEdit', () => {
      element._patchRange = {};
      const change = {
        current_revision: 'foo',
        revisions: {foo: {commit: {}, actions: {cherrypick: {enabled: true}}}},
      };
      let mockChange;

      // With no edit, mockChange should be unmodified.
      element._processEdit(mockChange = _.cloneDeep(change), null);
      assert.deepEqual(mockChange, change);

      // When edit is not based on the latest PS, current_revision should be
      // unmodified.
      const edit = {
        base_patch_set_number: 1,
        commit: {commit: 'bar'},
        fetch: true,
      };
      element._processEdit(mockChange = _.cloneDeep(change), edit);
      assert.notDeepEqual(mockChange, change);
      assert.equal(mockChange.revisions.bar._number, element.EDIT_NAME);
      assert.equal(mockChange.current_revision, change.current_revision);
      assert.deepEqual(mockChange.revisions.bar.commit, {commit: 'bar'});
      assert.notOk(mockChange.revisions.bar.actions);

      edit.base_revision = 'foo';
      element._processEdit(mockChange = _.cloneDeep(change), edit);
      assert.notDeepEqual(mockChange, change);
      assert.equal(mockChange.current_revision, 'bar');
      assert.deepEqual(mockChange.revisions.bar.actions,
          mockChange.revisions.foo.actions);

      // If _patchRange.patchNum is defined, do not load edit.
      element._patchRange.patchNum = 'baz';
      change.current_revision = 'baz';
      element._processEdit(mockChange = _.cloneDeep(change), edit);
      assert.equal(element._patchRange.patchNum, 'baz');
      assert.notOk(mockChange.revisions.bar.actions);
    });

    test('_editLoaded set when patchNum is an edit', () => {
      sandbox.stub(element, 'computeLatestPatchNum').returns('2');
      element._patchRange = {patchNum: element.EDIT_NAME};

      assert.isTrue(element._editLoaded);
      element.set('_patchRange.patchNum', 1);

      assert.isFalse(element._editLoaded);
    });

    test('file-action-tap handling', () => {
      const fileList = element.$.fileList;
      const Actions = GrEditConstants.Actions;
      const controls = element.$.fileListHeader.$.editControls;
      sandbox.stub(controls, 'openDeleteDialog');
      sandbox.stub(controls, 'openRenameDialog');
      sandbox.stub(controls, 'openRestoreDialog');
      sandbox.stub(Gerrit.Nav, 'getEditUrlForDiff');
      sandbox.stub(Gerrit.Nav, 'navigateToRelativeUrl');

      // Delete
      fileList.dispatchEvent(new CustomEvent('file-action-tap',
          {detail: {action: Actions.DELETE.id, path: 'foo'}, bubbles: true}));
      flushAsynchronousOperations();

      assert.isTrue(controls.openDeleteDialog.called);
      assert.equal(controls.openDeleteDialog.lastCall.args[0], 'foo');

      // Restore
      fileList.dispatchEvent(new CustomEvent('file-action-tap',
          {detail: {action: Actions.RESTORE.id, path: 'foo'}, bubbles: true}));
      flushAsynchronousOperations();

      assert.isTrue(controls.openRestoreDialog.called);
      assert.equal(controls.openRestoreDialog.lastCall.args[0], 'foo');

      // Rename
      fileList.dispatchEvent(new CustomEvent('file-action-tap',
          {detail: {action: Actions.RENAME.id, path: 'foo'}, bubbles: true}));
      flushAsynchronousOperations();

      assert.isTrue(controls.openRenameDialog.called);
      assert.equal(controls.openRenameDialog.lastCall.args[0], 'foo');

      // Edit
      fileList.dispatchEvent(new CustomEvent('file-action-tap',
          {detail: {action: Actions.EDIT.id, path: 'foo'}, bubbles: true}));
      flushAsynchronousOperations();

      assert.isTrue(Gerrit.Nav.getEditUrlForDiff.called);
      assert.equal(Gerrit.Nav.getEditUrlForDiff.lastCall.args[1], 'foo');
      assert.isTrue(Gerrit.Nav.navigateToRelativeUrl.called);
    });
  });
</script>