Add filtered search to group issue dashboard

19 files changed, 400 insertions, 45 deletions

diff --git a/app/assets/javascripts/dispatcher.js b/app/assets/javascripts/dispatcher.js
index a2664c0301e..178e72a1127 100644
--- a/app/assets/javascripts/dispatcher.js
+++ b/app/assets/javascripts/dispatcher.js
@@ -139,6 +139,8 @@ import GpgBadges from './gpg_badges';
           .init();
       }
 
+      const filteredSearchEnabled = gl.FilteredSearchManager && document.querySelector('.filtered-search');
+
       switch (page) {
         case 'profiles:preferences:show':
           initExperimentalFlags();
@@ -155,7 +157,7 @@ import GpgBadges from './gpg_badges';
           break;
         case 'projects:merge_requests:index':
         case 'projects:issues:index':
-          if (gl.FilteredSearchManager && document.querySelector('.filtered-search')) {
+          if (filteredSearchEnabled) {
             const filteredSearchManager = new gl.FilteredSearchManager(page === 'projects:issues:index' ? 'issues' : 'merge_requests');
             filteredSearchManager.setup();
           }
@@ -183,11 +185,17 @@ import GpgBadges from './gpg_badges';
           break;
         case 'dashboard:issues':
         case 'dashboard:merge_requests':
-        case 'groups:issues':
         case 'groups:merge_requests':
           new ProjectSelect();
           initLegacyFilters();
           break;
+        case 'groups:issues':
+          if (filteredSearchEnabled) {
+            const filteredSearchManager = new gl.FilteredSearchManager('issues');
+            filteredSearchManager.setup();
+          }
+          new ProjectSelect();
+          break;
         case 'dashboard:todos:index':
           new Todos();
           break;
diff --git a/app/assets/javascripts/droplab/plugins/ajax.js b/app/assets/javascripts/droplab/plugins/ajax.js
index c0da5866139..267b53fa4f2 100644
--- a/app/assets/javascripts/droplab/plugins/ajax.js
+++ b/app/assets/javascripts/droplab/plugins/ajax.js
@@ -11,6 +11,16 @@ const Ajax = {
 
     if (!self.destroyed) self.hook.list[config.method].call(self.hook.list, data);
   },
+  preprocessing: function preprocessing(config, data) {
+    let results = data;
+
+    if (config.preprocessing && !data.preprocessed) {
+      results = config.preprocessing(data);
+      AjaxCache.override(config.endpoint, results);
+    }
+
+    return results;
+  },
   init: function init(hook) {
     var self = this;
     self.destroyed = false;
@@ -31,7 +41,8 @@ const Ajax = {
       dynamicList.outerHTML = loadingTemplate.outerHTML;
     }
 
-    AjaxCache.retrieve(config.endpoint)
+    return AjaxCache.retrieve(config.endpoint)
+      .then(self.preprocessing.bind(null, config))
       .then((data) => self._loadData(data, config, self))
       .catch(config.onError);
   },
diff --git a/app/assets/javascripts/filtered_search/dropdown_non_user.js b/app/assets/javascripts/filtered_search/dropdown_non_user.js
index 2615d626c4c..0bc4b6f22a9 100644
--- a/app/assets/javascripts/filtered_search/dropdown_non_user.js
+++ b/app/assets/javascripts/filtered_search/dropdown_non_user.js
@@ -6,7 +6,7 @@ import './filtered_search_dropdown';
 
 class DropdownNonUser extends gl.FilteredSearchDropdown {
   constructor(options = {}) {
-    const { input, endpoint, symbol } = options;
+    const { input, endpoint, symbol, preprocessing } = options;
     super(options);
     this.symbol = symbol;
     this.config = {
@@ -14,6 +14,7 @@ class DropdownNonUser extends gl.FilteredSearchDropdown {
         endpoint,
         method: 'setData',
         loadingTemplate: this.loadingTemplate,
+        preprocessing,
         onError() {
           /* eslint-disable no-new */
           new Flash('An error occured fetching the dropdown data.');
diff --git a/app/assets/javascripts/filtered_search/dropdown_utils.js b/app/assets/javascripts/filtered_search/dropdown_utils.js
index ef8fe071012..9c7a4d9f6ad 100644
--- a/app/assets/javascripts/filtered_search/dropdown_utils.js
+++ b/app/assets/javascripts/filtered_search/dropdown_utils.js
@@ -50,6 +50,66 @@ class DropdownUtils {
     return updatedItem;
   }
 
+  static mergeDuplicateLabels(dataMap, newLabel) {
+    const updatedMap = dataMap;
+    const key = newLabel.title;
+
+    const hasKeyProperty = Object.prototype.hasOwnProperty.call(updatedMap, key);
+
+    if (!hasKeyProperty) {
+      updatedMap[key] = newLabel;
+    } else {
+      const existing = updatedMap[key];
+
+      if (!existing.multipleColors) {
+        existing.multipleColors = [existing.color];
+      }
+
+      existing.multipleColors.push(newLabel.color);
+    }
+
+    return updatedMap;
+  }
+
+  static duplicateLabelColor(labelColors) {
+    const colors = labelColors;
+    const spacing = 100 / colors.length;
+
+    // Reduce the colors to 4
+    colors.length = Math.min(colors.length, 4);
+
+    const color = colors.map((c, i) => {
+      const percentFirst = Math.floor(spacing * i);
+      const percentSecond = Math.floor(spacing * (i + 1));
+      return `${c} ${percentFirst}%, ${c} ${percentSecond}%`;
+    }).join(', ');
+
+    return `linear-gradient(${color})`;
+  }
+
+  static duplicateLabelPreprocessing(data) {
+    const results = [];
+    const dataMap = {};
+
+    data.forEach(DropdownUtils.mergeDuplicateLabels.bind(null, dataMap));
+
+    Object.keys(dataMap)
+      .forEach((key) => {
+        const label = dataMap[key];
+
+        if (label.multipleColors) {
+          label.color = DropdownUtils.duplicateLabelColor(label.multipleColors);
+          label.text_color = '#000000';
+        }
+
+        results.push(label);
+      });
+
+    results.preprocessed = true;
+
+    return results;
+  }
+
   static filterHint(config, item) {
     const { input, allowedKeys } = config;
     const updatedItem = item;
diff --git a/app/assets/javascripts/filtered_search/filtered_search_dropdown_manager.js b/app/assets/javascripts/filtered_search/filtered_search_dropdown_manager.js
index 61cef435209..47cecd5b5f7 100644
--- a/app/assets/javascripts/filtered_search/filtered_search_dropdown_manager.js
+++ b/app/assets/javascripts/filtered_search/filtered_search_dropdown_manager.js
@@ -54,6 +54,7 @@ class FilteredSearchDropdownManager {
         extraArguments: {
           endpoint: `${this.baseEndpoint}/labels.json`,
           symbol: '~',
+          preprocessing: gl.DropdownUtils.duplicateLabelPreprocessing,
         },
         element: this.container.querySelector('#js-dropdown-label'),
       },
diff --git a/app/assets/javascripts/filtered_search/filtered_search_manager.js b/app/assets/javascripts/filtered_search/filtered_search_manager.js
index 7872e9e68ad..3ce8b8607ad 100644
--- a/app/assets/javascripts/filtered_search/filtered_search_manager.js
+++ b/app/assets/javascripts/filtered_search/filtered_search_manager.js
@@ -20,13 +20,13 @@ class FilteredSearchManager {
       allowedKeys: this.filteredSearchTokenKeys.getKeys(),
     });
     this.searchHistoryDropdownElement = document.querySelector('.js-filtered-search-history-dropdown');
-    const projectPath = this.searchHistoryDropdownElement ?
-      this.searchHistoryDropdownElement.dataset.projectFullPath : 'project';
+    const fullPath = this.searchHistoryDropdownElement ?
+      this.searchHistoryDropdownElement.dataset.fullPath : 'project';
     let recentSearchesPagePrefix = 'issue-recent-searches';
     if (this.page === 'merge_requests') {
       recentSearchesPagePrefix = 'merge-request-recent-searches';
     }
-    const recentSearchesKey = `${projectPath}-${recentSearchesPagePrefix}`;
+    const recentSearchesKey = `${fullPath}-${recentSearchesPagePrefix}`;
     this.recentSearchesService = new RecentSearchesService(recentSearchesKey);
   }
 
diff --git a/app/assets/javascripts/filtered_search/filtered_search_visual_tokens.js b/app/assets/javascripts/filtered_search/filtered_search_visual_tokens.js
index e9278140af0..243ee4d723a 100644
--- a/app/assets/javascripts/filtered_search/filtered_search_visual_tokens.js
+++ b/app/assets/javascripts/filtered_search/filtered_search_visual_tokens.js
@@ -58,29 +58,54 @@ class FilteredSearchVisualTokens {
     `;
   }
 
+  static setTokenStyle(tokenContainer, backgroundColor, textColor) {
+    const token = tokenContainer;
+
+    // Labels with linear gradient should not override default background color
+    if (backgroundColor.indexOf('linear-gradient') === -1) {
+      token.style.backgroundColor = backgroundColor;
+    }
+
+    token.style.color = textColor;
+
+    if (textColor === '#FFFFFF') {
+      const removeToken = token.querySelector('.remove-token');
+      removeToken.classList.add('inverted');
+    }
+
+    return token;
+  }
+
+  static preprocessLabel(labelsEndpoint, labels) {
+    let processed = labels;
+
+    if (!labels.preprocessed) {
+      processed = gl.DropdownUtils.duplicateLabelPreprocessing(labels);
+      AjaxCache.override(labelsEndpoint, processed);
+      processed.preprocessed = true;
+    }
+
+    return processed;
+  }
+
   static updateLabelTokenColor(tokenValueContainer, tokenValue) {
     const filteredSearchInput = FilteredSearchContainer.container.querySelector('.filtered-search');
     const baseEndpoint = filteredSearchInput.dataset.baseEndpoint;
     const labelsEndpoint = `${baseEndpoint}/labels.json`;
 
     return AjaxCache.retrieve(labelsEndpoint)
-    .then((labels) => {
-      const matchingLabel = (labels || []).find(label => `~${gl.DropdownUtils.getEscapedText(label.title)}` === tokenValue);
-
-      if (!matchingLabel) {
-        return;
-      }
+      .then(FilteredSearchVisualTokens.preprocessLabel.bind(null, labelsEndpoint))
+      .then((labels) => {
+        const matchingLabel = (labels || []).find(label => `~${gl.DropdownUtils.getEscapedText(label.title)}` === tokenValue);
 
-      const tokenValueStyle = tokenValueContainer.style;
-      tokenValueStyle.backgroundColor = matchingLabel.color;
-      tokenValueStyle.color = matchingLabel.text_color;
+        if (!matchingLabel) {
+          return;
+        }
 
-      if (matchingLabel.text_color === '#FFFFFF') {
-        const removeToken = tokenValueContainer.querySelector('.remove-token');
-        removeToken.classList.add('inverted');
-      }
-    })
-    .catch(() => new Flash('An error occurred while fetching label colors.'));
+        FilteredSearchVisualTokens
+          .setTokenStyle(tokenValueContainer, matchingLabel.color, matchingLabel.text_color);
+      })
+      .catch(() => new Flash('An error occurred while fetching label colors.'));
   }
 
   static updateUserTokenAppearance(tokenValueContainer, tokenValueElement, tokenValue) {
diff --git a/app/assets/javascripts/labels_select.js b/app/assets/javascripts/labels_select.js
index 8d7d3d73571..f0e02ca0fb2 100644
--- a/app/assets/javascripts/labels_select.js
+++ b/app/assets/javascripts/labels_select.js
@@ -3,6 +3,7 @@
 /* global ListLabel */
 
 import IssuableBulkUpdateActions from './issuable_bulk_update_actions';
+import DropdownUtils from './filtered_search/dropdown_utils';
 
 (function() {
   this.LabelsSelect = (function() {
@@ -218,18 +219,7 @@ import IssuableBulkUpdateActions from './issuable_bulk_update_actions';
               }
             }
             if (label.duplicate) {
-              spacing = 100 / label.color.length;
-              // Reduce the colors to 4
-              label.color = label.color.filter(function(color, i) {
-                return i < 4;
-              });
-              color = _.map(label.color, function(color, i) {
-                var percentFirst, percentSecond;
-                percentFirst = Math.floor(spacing * i);
-                percentSecond = Math.floor(spacing * (i + 1));
-                return color + " " + percentFirst + "%," + color + " " + percentSecond + "% ";
-              }).join(',');
-              color = "linear-gradient(" + color + ")";
+              color = gl.DropdownUtils.duplicateLabelColor(label.color);
             }
             else {
               if (label.color != null) {
diff --git a/app/assets/javascripts/lib/utils/ajax_cache.js b/app/assets/javascripts/lib/utils/ajax_cache.js
index 7477b5a5214..629d8f44e18 100644
--- a/app/assets/javascripts/lib/utils/ajax_cache.js
+++ b/app/assets/javascripts/lib/utils/ajax_cache.js
@@ -6,6 +6,10 @@ class AjaxCache extends Cache {
     this.pendingRequests = { };
   }
 
+  override(endpoint, data) {
+    this.internalStorage[endpoint] = data;
+  }
+
   retrieve(endpoint, forceRetrieve) {
     if (this.hasData(endpoint) && !forceRetrieve) {
       return Promise.resolve(this.get(endpoint));
diff --git a/app/helpers/search_helper.rb b/app/helpers/search_helper.rb
index fd7ab59ce64..ae0e0aa3cf9 100644
--- a/app/helpers/search_helper.rb
+++ b/app/helpers/search_helper.rb
@@ -127,15 +127,23 @@ module SearchHelper
   end
 
   def search_filter_input_options(type)
-    {
+    opts = {
       id: "filtered-search-#{type}",
       placeholder: 'Search or filter results...',
       data: {
-        'project-id' => @project.id,
-        'username-params' => @users.to_json(only: [:id, :username]),
-        'base-endpoint' => project_path(@project)
+        'username-params' => @users.to_json(only: [:id, :username])
       }
     }
+
+    if @project.present?
+      opts[:data]['project-id'] = @project.id
+      opts[:data]['base-endpoint'] = project_path(@project)
+    else
+      # Group context
+      opts[:data]['base-endpoint'] = group_canonical_path(@group)
+    end
+
+    opts
   end
 
   # Sanitize a HTML field for search display. Most tags are stripped out and the
diff --git a/app/views/groups/issues.html.haml b/app/views/groups/issues.html.haml
index 735d9390699..f83ebbf09ef 100644
--- a/app/views/groups/issues.html.haml
+++ b/app/views/groups/issues.html.haml
@@ -4,6 +4,10 @@
 = content_for :meta_tags do
   = auto_discovery_link_tag(:atom, params.merge(rss_url_options), title: "#{@group.name} issues")
 
+- content_for :page_specific_javascripts do
+  = webpack_bundle_tag 'common_vue'
+  = webpack_bundle_tag 'filtered_search'
+
 - if show_new_nav? && group_issues_exists
   - content_for :breadcrumbs_extra do
     = link_to params.merge(rss_url_options), class: 'btn btn-default append-right-10' do
@@ -20,7 +24,7 @@
           Subscribe
       = render 'shared/new_project_item_select', path: 'issues/new', label: "New issue"
 
-  = render 'shared/issuable/filter', type: :issues
+  = render 'shared/issuable/search_bar', type: :issues
 
   .row-content-block.second-block
     Only issues from the
diff --git a/app/views/shared/issuable/_search_bar.html.haml b/app/views/shared/issuable/_search_bar.html.haml
index 3428d6e0445..1ad00461d76 100644
--- a/app/views/shared/issuable/_search_bar.html.haml
+++ b/app/views/shared/issuable/_search_bar.html.haml
@@ -1,5 +1,6 @@
 - type = local_assigns.fetch(:type)
 - block_css_class = type != :boards_modal ? 'row-content-block second-block' : ''
+- full_path = @project.present? ? @project.full_path : @group.full_path
 
 .issues-filters
   .issues-details-filters.filtered-search-block{ class: block_css_class, "v-pre" => type == :boards_modal }
@@ -18,7 +19,7 @@
               dropdown_class: "filtered-search-history-dropdown",
               content_class: "filtered-search-history-dropdown-content",
               title: "Recent searches" }) do
-              .js-filtered-search-history-dropdown{ data: { project_full_path: @project.full_path } }
+              .js-filtered-search-history-dropdown{ data: { full_path: full_path } }
           .filtered-search-box-input-container.droplab-dropdown
             .scroll-container
               %ul.tokens-container.list-unstyled
diff --git a/changelogs/unreleased/add-filtered-search-group-issues-ce.yml b/changelogs/unreleased/add-filtered-search-group-issues-ce.yml
new file mode 100644
index 00000000000..f83f4173890
--- /dev/null
+++ b/changelogs/unreleased/add-filtered-search-group-issues-ce.yml
@@ -0,0 +1,4 @@
+---
+title: Add filtered search to group issue dashboard
+merge_request:
+author:
diff --git a/spec/features/groups/issues_spec.rb b/spec/features/groups/issues_spec.rb
index 449a99a2c7b..cdf7aceb13c 100644
--- a/spec/features/groups/issues_spec.rb
+++ b/spec/features/groups/issues_spec.rb
@@ -1,6 +1,8 @@
 require 'spec_helper'
 
 feature 'Group issues page' do
+  include FilteredSearchHelpers
+
   let(:path) { issues_group_path(group) }
   let(:issuable) { create(:issue, project: project, title: "this is my created issuable")}
 
@@ -31,12 +33,10 @@ feature 'Group issues page' do
     let(:path) { issues_group_path(group) }
 
     it 'filters by only group users' do
-      click_button('Assignee')
-
-      wait_for_requests
+      filtered_search.set('assignee:')
 
-      expect(find('.dropdown-menu-assignee')).to have_link(user.name)
-      expect(find('.dropdown-menu-assignee')).not_to have_link(user2.name)
+      expect(find('#js-dropdown-assignee .filter-dropdown')).to have_content(user.name)
+      expect(find('#js-dropdown-assignee .filter-dropdown')).not_to have_content(user2.name)
     end
   end
 end
diff --git a/spec/helpers/search_helper_spec.rb b/spec/helpers/search_helper_spec.rb
index b7e547dc1f5..4dab21440a6 100644
--- a/spec/helpers/search_helper_spec.rb
+++ b/spec/helpers/search_helper_spec.rb
@@ -68,4 +68,38 @@ describe SearchHelper do
       end
     end
   end
+
+  describe 'search_filter_input_options' do
+    context 'project' do
+      before do
+        @project = create(:project, :repository)
+      end
+
+      it 'includes id with type' do
+        expect(search_filter_input_options('type')[:id]).to eq('filtered-search-type')
+      end
+
+      it 'includes project-id' do
+        expect(search_filter_input_options('')[:data]['project-id']).to eq(@project.id)
+      end
+
+      it 'includes project base-endpoint' do
+        expect(search_filter_input_options('')[:data]['base-endpoint']).to eq(project_path(@project))
+      end
+    end
+
+    context 'group' do
+      before do
+        @group = create(:group, name: 'group')
+      end
+
+      it 'does not includes project-id' do
+        expect(search_filter_input_options('')[:data]['project-id']).to eq(nil)
+      end
+
+      it 'includes group base-endpoint' do
+        expect(search_filter_input_options('')[:data]['base-endpoint']).to eq("/groups#{group_path(@group)}")
+      end
+    end
+  end
 end
diff --git a/spec/javascripts/droplab/plugins/ajax_spec.js b/spec/javascripts/droplab/plugins/ajax_spec.js
new file mode 100644
index 00000000000..085f25764fe
--- /dev/null
+++ b/spec/javascripts/droplab/plugins/ajax_spec.js
@@ -0,0 +1,36 @@
+import AjaxCache from '~/lib/utils/ajax_cache';
+import Ajax from '~/droplab/plugins/ajax';
+
+describe('Ajax', () => {
+  describe('preprocessing', () => {
+    const config = {};
+
+    describe('is not configured', () => {
+      it('passes the data through', () => {
+        const data = ['data'];
+        expect(Ajax.preprocessing(config, data)).toEqual(data);
+      });
+    });
+
+    describe('is configured', () => {
+      const processedArray = ['processed'];
+
+      beforeEach(() => {
+        config.preprocessing = () => processedArray;
+        spyOn(config, 'preprocessing').and.callFake(() => processedArray);
+      });
+
+      it('calls preprocessing', () => {
+        Ajax.preprocessing(config, []);
+        expect(config.preprocessing.calls.count()).toBe(1);
+      });
+
+      it('overrides AjaxCache', () => {
+        spyOn(AjaxCache, 'override').and.callFake((endpoint, results) => expect(results).toEqual(processedArray));
+
+        Ajax.preprocessing(config, []);
+        expect(AjaxCache.override.calls.count()).toBe(1);
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/filtered_search/dropdown_utils_spec.js b/spec/javascripts/filtered_search/dropdown_utils_spec.js
index f55726379f3..244f170ab7a 100644
--- a/spec/javascripts/filtered_search/dropdown_utils_spec.js
+++ b/spec/javascripts/filtered_search/dropdown_utils_spec.js
@@ -191,6 +191,102 @@ describe('Dropdown Utils', () => {
     });
   });
 
+  describe('mergeDuplicateLabels', () => {
+    const dataMap = {
+      label: {
+        title: 'label',
+        color: '#FFFFFF',
+      },
+    };
+
+    it('should add label to dataMap if it is not a duplicate', () => {
+      const newLabel = {
+        title: 'new-label',
+        color: '#000000',
+      };
+
+      const updated = gl.DropdownUtils.mergeDuplicateLabels(dataMap, newLabel);
+      expect(updated[newLabel.title]).toEqual(newLabel);
+    });
+
+    it('should merge colors if label is a duplicate', () => {
+      const duplicate = {
+        title: 'label',
+        color: '#000000',
+      };
+
+      const updated = gl.DropdownUtils.mergeDuplicateLabels(dataMap, duplicate);
+      expect(updated.label.multipleColors).toEqual([dataMap.label.color, duplicate.color]);
+    });
+  });
+
+  describe('duplicateLabelColor', () => {
+    it('should linear-gradient 2 colors', () => {
+      const gradient = gl.DropdownUtils.duplicateLabelColor(['#FFFFFF', '#000000']);
+      expect(gradient).toEqual('linear-gradient(#FFFFFF 0%, #FFFFFF 50%, #000000 50%, #000000 100%)');
+    });
+
+    it('should linear-gradient 3 colors', () => {
+      const gradient = gl.DropdownUtils.duplicateLabelColor(['#FFFFFF', '#000000', '#333333']);
+      expect(gradient).toEqual('linear-gradient(#FFFFFF 0%, #FFFFFF 33%, #000000 33%, #000000 66%, #333333 66%, #333333 100%)');
+    });
+
+    it('should linear-gradient 4 colors', () => {
+      const gradient = gl.DropdownUtils.duplicateLabelColor(['#FFFFFF', '#000000', '#333333', '#DDDDDD']);
+      expect(gradient).toEqual('linear-gradient(#FFFFFF 0%, #FFFFFF 25%, #000000 25%, #000000 50%, #333333 50%, #333333 75%, #DDDDDD 75%, #DDDDDD 100%)');
+    });
+
+    it('should not linear-gradient more than 4 colors', () => {
+      const gradient = gl.DropdownUtils.duplicateLabelColor(['#FFFFFF', '#000000', '#333333', '#DDDDDD', '#EEEEEE']);
+      expect(gradient.indexOf('#EEEEEE') === -1).toEqual(true);
+    });
+  });
+
+  describe('duplicateLabelPreprocessing', () => {
+    it('should set preprocessed to true', () => {
+      const results = gl.DropdownUtils.duplicateLabelPreprocessing([]);
+      expect(results.preprocessed).toEqual(true);
+    });
+
+    it('should not mutate existing data if there are no duplicates', () => {
+      const data = [{
+        title: 'label1',
+        color: '#FFFFFF',
+      }, {
+        title: 'label2',
+        color: '#000000',
+      }];
+      const results = gl.DropdownUtils.duplicateLabelPreprocessing(data);
+
+      expect(results.length).toEqual(2);
+      expect(results[0]).toEqual(data[0]);
+      expect(results[1]).toEqual(data[1]);
+    });
+
+    describe('duplicate labels', () => {
+      const data = [{
+        title: 'label',
+        color: '#FFFFFF',
+      }, {
+        title: 'label',
+        color: '#000000',
+      }];
+      const results = gl.DropdownUtils.duplicateLabelPreprocessing(data);
+
+      it('should merge duplicate labels', () => {
+        expect(results.length).toEqual(1);
+      });
+
+      it('should convert multiple colored labels into linear-gradient', () => {
+        expect(results[0].color).toEqual(gl.DropdownUtils.duplicateLabelColor(['#FFFFFF', '#000000']));
+      });
+
+      it('should set multiple colored label text color to black', () => {
+        expect(results[0].text_color).toEqual('#000000');
+      });
+    });
+  });
+
   describe('setDataValueIfSelected', () => {
     beforeEach(() => {
       spyOn(gl.FilteredSearchDropdownManager, 'addWordToInput')
diff --git a/spec/javascripts/filtered_search/filtered_search_visual_tokens_spec.js b/spec/javascripts/filtered_search/filtered_search_visual_tokens_spec.js
index fa4343ffbc8..67166802c70 100644
--- a/spec/javascripts/filtered_search/filtered_search_visual_tokens_spec.js
+++ b/spec/javascripts/filtered_search/filtered_search_visual_tokens_spec.js
@@ -797,6 +797,69 @@ describe('Filtered Search Visual Tokens', () => {
     });
   });
 
+  describe('setTokenStyle', () => {
+    let originalTextColor;
+
+    beforeEach(() => {
+      originalTextColor = bugLabelToken.style.color;
+    });
+
+    it('should set backgroundColor', () => {
+      const originalBackgroundColor = bugLabelToken.style.backgroundColor;
+      const token = subject.setTokenStyle(bugLabelToken, 'blue', 'white');
+      expect(token.style.backgroundColor).toEqual('blue');
+      expect(token.style.backgroundColor).not.toEqual(originalBackgroundColor);
+    });
+
+    it('should not set backgroundColor when it is a linear-gradient', () => {
+      const token = subject.setTokenStyle(bugLabelToken, 'linear-gradient(135deg, red, blue)', 'white');
+      expect(token.style.backgroundColor).toEqual(bugLabelToken.style.backgroundColor);
+    });
+
+    it('should set textColor', () => {
+      const token = subject.setTokenStyle(bugLabelToken, 'white', 'black');
+      expect(token.style.color).toEqual('black');
+      expect(token.style.color).not.toEqual(originalTextColor);
+    });
+
+    it('should add inverted class when textColor is #FFFFFF', () => {
+      const token = subject.setTokenStyle(bugLabelToken, 'black', '#FFFFFF');
+      expect(token.style.color).toEqual('rgb(255, 255, 255)');
+      expect(token.style.color).not.toEqual(originalTextColor);
+      expect(token.querySelector('.remove-token').classList.contains('inverted')).toEqual(true);
+    });
+  });
+
+  describe('preprocessLabel', () => {
+    const endpoint = 'endpoint';
+
+    it('does not preprocess more than once', () => {
+      let labels = [];
+
+      spyOn(gl.DropdownUtils, 'duplicateLabelPreprocessing').and.callFake(() => []);
+
+      labels = gl.FilteredSearchVisualTokens.preprocessLabel(endpoint, labels);
+      gl.FilteredSearchVisualTokens.preprocessLabel(endpoint, labels);
+
+      expect(gl.DropdownUtils.duplicateLabelPreprocessing.calls.count()).toEqual(1);
+    });
+
+    describe('not preprocessed before', () => {
+      it('returns preprocessed labels', () => {
+        let labels = [];
+        expect(labels.preprocessed).not.toEqual(true);
+        labels = gl.FilteredSearchVisualTokens.preprocessLabel(endpoint, labels);
+        expect(labels.preprocessed).toEqual(true);
+      });
+
+      it('overrides AjaxCache with preprocessed results', () => {
+        spyOn(AjaxCache, 'override').and.callFake(() => {});
+        gl.FilteredSearchVisualTokens.preprocessLabel(endpoint, []);
+        expect(AjaxCache.override.calls.count()).toEqual(1);
+      });
+    });
+  });
+
   describe('updateLabelTokenColor', () => {
     const jsonFixtureName = 'labels/project_labels.json';
     const dummyEndpoint = '/dummy/endpoint';
diff --git a/spec/javascripts/lib/utils/ajax_cache_spec.js b/spec/javascripts/lib/utils/ajax_cache_spec.js
index 2c946802dcd..49971bd91e2 100644
--- a/spec/javascripts/lib/utils/ajax_cache_spec.js
+++ b/spec/javascripts/lib/utils/ajax_cache_spec.js
@@ -77,6 +77,15 @@ describe('AjaxCache', () => {
     });
   });
 
+  describe('override', () => {
+    it('overrides existing cache', () => {
+      AjaxCache.internalStorage.endpoint = 'existing-endpoint';
+      AjaxCache.override('endpoint', 'new-endpoint');
+
+      expect(AjaxCache.internalStorage.endpoint).toEqual('new-endpoint');
+    });
+  });
+
   describe('retrieve', () => {
     let ajaxSpy;