fix eslint failures on Diff and MergeRequestTabs

app/assets/javascripts/diff.js.es6

-/* eslint-disable */
+/* eslint-disable class-methods-use-this, no-param-reassign */
 
 ((global) => {
   const UNFOLD_COUNT = 20;
@@ -29,7 +29,8 @@
       const newLineNumber = ref[1];
       const offset = newLineNumber - oldLineNumber;
       const bottom = $target.hasClass('js-unfold-bottom');
-      let since, to;
+      let since;
+      let to;
       let unfold = true;
 
       if (bottom) {
@@ -54,19 +55,19 @@
       const view = file.data('view');
 
       const params = { since, to, bottom, offset, unfold, view };
-      $.get(link, params, (response) => $target.parent().replaceWith(response));
+      $.get(link, params, response => $target.parent().replaceWith(response));
     }
 
     handleClickLineNum(event) {
       const hash = $(event.currentTarget).attr('href');
       event.preventDefault();
-      if (history.pushState) {
-        history.pushState(null, null, hash);
+      if (window.history.pushState) {
+        window.history.pushState(null, null, hash);
       } else {
         window.location.hash = hash;
       }
       this.highlighSelectedLine();
-    };
+    }
 
     diffViewType() {
       return $('.inline-parallel-buttons a.active').data('view-type');
@@ -76,10 +77,7 @@
       if (!line.children().length) {
         return [0, 0];
       }
-
-      return line.find('.diff-line-num').map(function() {
-        return parseInt($(this).data('linenumber'));
-      });
+      return line.find('.diff-line-num').map((i, elm) => parseInt($(elm).data('linenumber'), 10));
     }
 
     highlighSelectedLine() {
@@ -96,5 +94,4 @@
   }
 
   global.Diff = Diff;
-
 })(window.gl || (window.gl = {}));

app/assets/javascripts/merge_request_tabs.js.es6

-/* eslint-disable max-len, func-names, space-before-function-paren, no-var, space-before-blocks, prefer-rest-params, wrap-iife, no-use-before-define, no-underscore-dangle, no-undef, one-var, one-var-declaration-per-line, quotes, comma-dangle, consistent-return, prefer-template, no-param-reassign, camelcase, vars-on-top, space-in-parens, curly, prefer-arrow-callback, no-unused-vars, no-return-assign, semi, object-shorthand, operator-assignment, padded-blocks, max-len */
+/* eslint-disable no-new, no-param-reassign, class-methods-use-this */
+/* global Breakpoints, Cookies, DiffNotesApp */
+
+/*= require js.cookie */
+/*= require breakpoints */
+
+/* eslint-disable max-len */
 // MergeRequestTabs
 //
 // Handles persisting and restoring the current tab selection and lazily-loading
 // content on the MergeRequests#show page.
-//
-/*= require js.cookie */
-
 //
 // ### Example Markup
 //
@@ -45,11 +48,15 @@
 //     </div>
 //   </div>
 //
+/* eslint-enable max-len */
+
 ((global) => {
+  // Store the `location` object, allowing for easier stubbing in tests
+  let location = window.location;
 
   class MergeRequestTabs {
 
-    constructor({ action, setUrl, buildsLoaded } = {}) {
+    constructor({ action, setUrl, buildsLoaded, stubLocation } = {}) {
       this.diffsLoaded = false;
       this.buildsLoaded = false;
       this.pipelinesLoaded = false;
@@ -63,8 +70,10 @@
       this.tabShown = this.tabShown.bind(this);
       this.showTab = this.showTab.bind(this);
 
-      // Store the `location` object, allowing for easier stubbing in tests
-      this._location = window.location;
+      if (stubLocation) {
+        location = stubLocation;
+      }
+
       this.bindEvents();
       this.activateTab(action);
       this.initAffix();
@@ -97,15 +106,15 @@
         this.resetViewContainer();
       } else if (this.isDiffAction(action)) {
         this.loadDiff($target.attr('href'));
-        if ((typeof bp !== "undefined" && bp !== null) && bp.getBreakpointSize() !== 'lg') {
+        if (Breakpoints.get().getBreakpointSize() !== 'lg') {
           this.shrinkView();
         }
         if (this.diffViewType() === 'parallel') {
           this.expandViewContainer();
         }
         const navBarHeight = $('.navbar-gitlab').outerHeight();
-        $.scrollTo(".merge-request-details .merge-request-tabs", {
-          offset: -navBarHeight
+        $.scrollTo('.merge-request-details .merge-request-tabs', {
+          offset: -navBarHeight,
         });
       } else if (action === 'builds') {
         this.loadBuilds($target.attr('href'));
@@ -125,13 +134,12 @@
     }
 
     scrollToElement(container) {
-      if (window.location.hash) {
+      if (location.hash) {
         const navBarHeight = $('.navbar-gitlab').outerHeight() + $('.layout-nav').outerHeight() + document.querySelector('.js-tabs-affix').offsetHeight;
-        const navBarHeight = $('.navbar-gitlab').outerHeight() + $('.layout-nav').outerHeight();
-        const $el = $(`${container} ${window.location.hash}:not(.match)`);
+        const $el = $(`${container} ${location.hash}:not(.match)`);
         if ($el.length) {
           $.scrollTo($el[0], {
-            offset: -navBarHeight
+            offset: -navBarHeight,
           });
         }
       }
@@ -139,11 +147,9 @@
 
     // Activate a tab based on the current action
     activateTab(action) {
-      if (action === 'show') {
-        action = 'notes';
-      }
+      const activate = action === 'show' ? 'notes' : action;
       // important note: the .tab('show') method triggers 'shown.bs.tab' event itself
-      $(`.merge-request-tabs a[data-action='${action}']`).tab('show');
+      $(`.merge-request-tabs a[data-action='${activate}']`).tab('show');
     }
 
     // Replaces the current Merge Request-specific action in the URL with a new one
@@ -167,33 +173,29 @@
     //
     // Returns the new URL String
     setCurrentAction(action) {
-      // Normalize action, just to be safe
-      if (action === 'show') {
-        action = 'notes';
-      }
-      this.currentAction = action;
+      this.currentAction = action === 'show' ? 'notes' : action;
 
       // Remove a trailing '/commits' '/diffs' '/builds' '/pipelines' '/new' '/new/diffs'
-      let new_state = this._location.pathname.replace(/\/(commits|diffs|builds|pipelines|new|new\/diffs)(\.html)?\/?$/, '');
+      let newState = location.pathname.replace(/\/(commits|diffs|builds|pipelines|new|new\/diffs)(\.html)?\/?$/, '');
 
       // Append the new action if we're on a tab other than 'notes'
-      if (action !== 'notes') {
-        new_state += `/${action}`;
+      if (this.currentAction !== 'notes') {
+        newState += `/${this.currentAction}`;
       }
 
       // Ensure parameters and hash come along for the ride
-      new_state += this._location.search + this._location.hash;
+      newState += location.search + location.hash;
 
       // Replace the current history state with the new one without breaking
       // Turbolinks' history.
       //
       // See https://github.com/rails/turbolinks/issues/363
-      history.replaceState({
+      window.history.replaceState({
         turbolinks: true,
-        url: new_state
-      }, document.title, new_state);
+        url: newState,
+      }, document.title, newState);
 
-      return new_state;
+      return newState;
     }
 
     loadCommits(source) {
@@ -203,11 +205,11 @@
       this.ajaxGet({
         url: `${source}.json`,
         success: (data) => {
-          document.querySelector("div#commits").innerHTML = data.html;
+          document.querySelector('div#commits').innerHTML = data.html;
           gl.utils.localTimeAgo($('.js-timeago', 'div#commits'));
           this.commitsLoaded = true;
-          this.scrollToElement("#commits");
-        }
+          this.scrollToElement('#commits');
+        },
       });
     }
 
@@ -222,7 +224,7 @@
       url.href = source;
 
       this.ajaxGet({
-        url: `${url.pathname}.json${this._location.search}`,
+        url: `${url.pathname}.json${location.search}`,
         success: (data) => {
           $('#diffs').html(data.html);
 
@@ -233,14 +235,14 @@
           gl.utils.localTimeAgo($('.js-timeago', 'div#diffs'));
           $('#diffs .js-syntax-highlight').syntaxHighlight();
 
-          if (this.diffViewType() === 'parallel' && this.isDiffAction(this.currentAction) ) {
+          if (this.diffViewType() === 'parallel' && this.isDiffAction(this.currentAction)) {
             this.expandViewContainer();
           }
           this.diffsLoaded = true;
-          this.scrollToElement("#diffs");
+          this.scrollToElement('#diffs');
 
           new gl.Diff();
-        }
+        },
       });
     }
 
@@ -251,12 +253,12 @@
       this.ajaxGet({
         url: `${source}.json`,
         success: (data) => {
-          document.querySelector("div#builds").innerHTML = data.html;
+          document.querySelector('div#builds').innerHTML = data.html;
           gl.utils.localTimeAgo($('.js-timeago', 'div#builds'));
           this.buildsLoaded = true;
           new gl.Pipelines();
-          this.scrollToElement("#builds");
-        }
+          this.scrollToElement('#builds');
+        },
       });
     }
 
@@ -270,8 +272,8 @@
           $('#pipelines').html(data.html);
           gl.utils.localTimeAgo($('.js-timeago', '#pipelines'));
           this.pipelinesLoaded = true;
-          this.scrollToElement("#pipelines");
-        }
+          this.scrollToElement('#pipelines');
+        },
       });
     }
 
@@ -287,10 +289,9 @@
         beforeSend: () => this.toggleLoading(true),
         complete: () => this.toggleLoading(false),
         dataType: 'json',
-        type: 'GET'
+        type: 'GET',
       };
-      options = $.extend({}, defaults, options);
-      $.ajax(options);
+      $.ajax($.extend({}, defaults, options));
     }
 
     diffViewType() {
@@ -298,7 +299,7 @@
     }
 
     isDiffAction(action) {
-      return action === 'diffs' || action === 'new/diffs'
+      return action === 'diffs' || action === 'new/diffs';
     }
 
     expandViewContainer() {
@@ -356,11 +357,13 @@
       const $layoutNav = $('.layout-nav');
 
       $tabs.off('affix.bs.affix affix-top.bs.affix')
-        .affix({ offset: {
+        .affix({
+          offset: {
             top: () => (
               $diffTabs.offset().top - $tabs.height() - $fixedNav.height() - $layoutNav.height()
-          )
-        }})
+            ),
+          },
+        })
         .on('affix.bs.affix', () => $diffTabs.css({ marginTop: $tabs.height() }))
         .on('affix-top.bs.affix', () => $diffTabs.css({ marginTop: '' }));
 
@@ -372,5 +375,4 @@
   }
 
   global.MergeRequestTabs = MergeRequestTabs;
-
 })(window.gl || (window.gl = {}));

spec/javascripts/merge_request_tabs_spec.js

-/* eslint-disable space-before-function-paren, no-var, comma-dangle, dot-notation, quotes, no-undef, no-return-assign, no-underscore-dangle, camelcase, padded-blocks, max-len */
+/* eslint-disable no-var, comma-dangle, object-shorthand */
 
 /*= require merge_request_tabs */
 //= require breakpoints
 
-(function() {
-  describe('MergeRequestTabs', function() {
-    var stubLocation;
-    stubLocation = function(stubs) {
-      var defaults;
-      defaults = {
+(function () {
+  describe('MergeRequestTabs', function () {
+    var stubLocation = {};
+    var setLocation = function (stubs) {
+      var defaults = {
         pathname: '',
         search: '',
         hash: ''
       };
-      return $.extend(defaults, stubs);
+      $.extend(stubLocation, defaults, stubs || {});
     };
     fixture.preload('merge_request_tabs.html');
-    beforeEach(function() {
-      this["class"] = new gl.MergeRequestTabs();
-      return this.spies = {
-        ajax: spyOn($, 'ajax').and.callFake(function() {}),
-        history: spyOn(history, 'replaceState').and.callFake(function() {})
+
+    beforeEach(function () {
+      this.class = new gl.MergeRequestTabs({ stubLocation: stubLocation });
+      setLocation();
+
+      this.spies = {
+        ajax: spyOn($, 'ajax').and.callFake(function () {}),
+        history: spyOn(window.history, 'replaceState').and.callFake(function () {})
       };
     });
-    describe('#activateTab', function() {
-      beforeEach(function() {
+
+    describe('#activateTab', function () {
+      beforeEach(function () {
         fixture.load('merge_request_tabs.html');
-        return this.subject = this["class"].activateTab;
+        this.subject = this.class.activateTab;
       });
-      it('shows the first tab when action is show', function() {
+      it('shows the first tab when action is show', function () {
         this.subject('show');
-        return expect($('#notes')).toHaveClass('active');
+        expect($('#notes')).toHaveClass('active');
       });
-      it('shows the notes tab when action is notes', function() {
+      it('shows the notes tab when action is notes', function () {
         this.subject('notes');
-        return expect($('#notes')).toHaveClass('active');
+        expect($('#notes')).toHaveClass('active');
       });
-      it('shows the commits tab when action is commits', function() {
+      it('shows the commits tab when action is commits', function () {
         this.subject('commits');
-        return expect($('#commits')).toHaveClass('active');
+        expect($('#commits')).toHaveClass('active');
       });
-      return it('shows the diffs tab when action is diffs', function() {
+      it('shows the diffs tab when action is diffs', function () {
         this.subject('diffs');
-        return expect($('#diffs')).toHaveClass('active');
+        expect($('#diffs')).toHaveClass('active');
       });
     });
-    return describe('#setCurrentAction', function() {
-      beforeEach(function() {
-        return this.subject = this["class"].setCurrentAction;
+
+    describe('#setCurrentAction', function () {
+      beforeEach(function () {
+        this.subject = this.class.setCurrentAction;
       });
-      it('changes from commits', function() {
-        this["class"]._location = stubLocation({
+      it('changes from commits', function () {
+        setLocation({
           pathname: '/foo/bar/merge_requests/1/commits'
         });
         expect(this.subject('notes')).toBe('/foo/bar/merge_requests/1');
-        return expect(this.subject('diffs')).toBe('/foo/bar/merge_requests/1/diffs');
+        expect(this.subject('diffs')).toBe('/foo/bar/merge_requests/1/diffs');
       });
-      it('changes from diffs', function() {
-        this["class"]._location = stubLocation({
+      it('changes from diffs', function () {
+        setLocation({
           pathname: '/foo/bar/merge_requests/1/diffs'
         });
         expect(this.subject('notes')).toBe('/foo/bar/merge_requests/1');
-        return expect(this.subject('commits')).toBe('/foo/bar/merge_requests/1/commits');
+        expect(this.subject('commits')).toBe('/foo/bar/merge_requests/1/commits');
       });
-      it('changes from diffs.html', function() {
-        this["class"]._location = stubLocation({
+      it('changes from diffs.html', function () {
+        setLocation({
           pathname: '/foo/bar/merge_requests/1/diffs.html'
         });
         expect(this.subject('notes')).toBe('/foo/bar/merge_requests/1');
-        return expect(this.subject('commits')).toBe('/foo/bar/merge_requests/1/commits');
+        expect(this.subject('commits')).toBe('/foo/bar/merge_requests/1/commits');
       });
-      it('changes from notes', function() {
-        this["class"]._location = stubLocation({
+      it('changes from notes', function () {
+        setLocation({
           pathname: '/foo/bar/merge_requests/1'
         });
         expect(this.subject('diffs')).toBe('/foo/bar/merge_requests/1/diffs');
-        return expect(this.subject('commits')).toBe('/foo/bar/merge_requests/1/commits');
+        expect(this.subject('commits')).toBe('/foo/bar/merge_requests/1/commits');
       });
-      it('includes search parameters and hash string', function() {
-        this["class"]._location = stubLocation({
+      it('includes search parameters and hash string', function () {
+        setLocation({
           pathname: '/foo/bar/merge_requests/1/diffs',
           search: '?view=parallel',
           hash: '#L15-35'
         });
-        return expect(this.subject('show')).toBe('/foo/bar/merge_requests/1?view=parallel#L15-35');
+        expect(this.subject('show')).toBe('/foo/bar/merge_requests/1?view=parallel#L15-35');
       });
-      it('replaces the current history state', function() {
-        var new_state;
-        this["class"]._location = stubLocation({
+      it('replaces the current history state', function () {
+        var newState;
+        setLocation({
           pathname: '/foo/bar/merge_requests/1'
         });
-        new_state = this.subject('commits');
-        return expect(this.spies.history).toHaveBeenCalledWith({
+        newState = this.subject('commits');
+        expect(this.spies.history).toHaveBeenCalledWith({
           turbolinks: true,
-          url: new_state
-        }, document.title, new_state);
+          url: newState
+        }, document.title, newState);
       });
-      return it('treats "show" like "notes"', function() {
-        this["class"]._location = stubLocation({
+      it('treats "show" like "notes"', function () {
+        setLocation({
           pathname: '/foo/bar/merge_requests/1/commits'
         });
-        return expect(this.subject('show')).toBe('/foo/bar/merge_requests/1');
+        expect(this.subject('show')).toBe('/foo/bar/merge_requests/1');
       });
     });
   });
-
 }).call(this);