diff --git a/.gitlab/ci/rails.gitlab-ci.yml b/.gitlab/ci/rails.gitlab-ci.yml
index e8087aebcef..b9c19b21ef3 100644
--- a/.gitlab/ci/rails.gitlab-ci.yml
+++ b/.gitlab/ci/rails.gitlab-ci.yml
@@ -46,7 +46,8 @@ static-analysis:
   stage: test
   variables:
     SETUP_DB: "false"
-  parallel: 2
+    ENABLE_SPRING: "1"
+  parallel: 4
   script:
     - scripts/static-analysis
   cache:
diff --git a/.gitlab/ci/review.gitlab-ci.yml b/.gitlab/ci/review.gitlab-ci.yml
index 46a281cd48f..d26685645f9 100644
--- a/.gitlab/ci/review.gitlab-ci.yml
+++ b/.gitlab/ci/review.gitlab-ci.yml
@@ -233,6 +233,7 @@ danger-review:
     - .review:rules:danger
   image: registry.gitlab.com/gitlab-org/gitlab-build-images:danger
   stage: test
+  allow_failure: true
   needs: []
   script:
     - source scripts/utils.sh
diff --git a/app/assets/javascripts/ide/components/ide_side_bar.vue b/app/assets/javascripts/ide/components/ide_side_bar.vue
index 31a239092c2..1eb89b41495 100644
--- a/app/assets/javascripts/ide/components/ide_side_bar.vue
+++ b/app/assets/javascripts/ide/components/ide_side_bar.vue
@@ -9,7 +9,7 @@ import CommitForm from './commit_sidebar/form.vue';
 import IdeReview from './ide_review.vue';
 import SuccessMessage from './commit_sidebar/success_message.vue';
 import IdeProjectHeader from './ide_project_header.vue';
-import { leftSidebarViews, LEFT_SIDEBAR_INIT_WIDTH } from '../constants';
+import { leftSidebarViews, SIDEBAR_INIT_WIDTH } from '../constants';
 
 export default {
   components: {
@@ -33,13 +33,13 @@ export default {
       );
     },
   },
-  LEFT_SIDEBAR_INIT_WIDTH,
+  SIDEBAR_INIT_WIDTH,
 };
 </script>
 
 <template>
   <resizable-panel
-    :initial-width="$options.LEFT_SIDEBAR_INIT_WIDTH"
+    :initial-width="$options.SIDEBAR_INIT_WIDTH"
     side="left"
     class="multi-file-commit-panel flex-column"
   >
diff --git a/app/assets/javascripts/ide/components/panes/collapsible_sidebar.vue b/app/assets/javascripts/ide/components/panes/collapsible_sidebar.vue
index 2814844d157..4e8e1e3a470 100644
--- a/app/assets/javascripts/ide/components/panes/collapsible_sidebar.vue
+++ b/app/assets/javascripts/ide/components/panes/collapsible_sidebar.vue
@@ -2,7 +2,6 @@
 import { mapActions, mapState } from 'vuex';
 import tooltip from '~/vue_shared/directives/tooltip';
 import Icon from '~/vue_shared/components/icon.vue';
-import ResizablePanel from '../resizable_panel.vue';
 import IdeSidebarNav from '../ide_sidebar_nav.vue';
 
 export default {
@@ -12,7 +11,6 @@ export default {
   },
   components: {
     Icon,
-    ResizablePanel,
     IdeSidebarNav,
   },
   props: {
@@ -25,10 +23,6 @@ export default {
       type: String,
       required: true,
     },
-    width: {
-      type: Number,
-      required: true,
-    },
   },
   computed: {
     ...mapState({
@@ -75,25 +69,20 @@ export default {
     :data-qa-selector="`ide_${side}_sidebar`"
     class="multi-file-commit-panel ide-sidebar"
   >
-    <resizable-panel
+    <div
       v-show="isOpen"
-      :initial-width="width"
-      :min-size="width"
       :class="`ide-${side}-sidebar-${currentView}`"
-      :side="side"
       class="multi-file-commit-panel-inner"
     >
-      <div class="h-100 d-flex flex-column align-items-stretch">
-        <div
-          v-for="tabView in aliveTabViews"
-          v-show="tabView.name === currentView"
-          :key="tabView.name"
-          class="flex-fill gl-overflow-hidden js-tab-view"
-        >
-          <component :is="tabView.component" />
-        </div>
+      <div
+        v-for="tabView in aliveTabViews"
+        v-show="tabView.name === currentView"
+        :key="tabView.name"
+        class="flex-fill gl-overflow-hidden js-tab-view gl-h-full"
+      >
+        <component :is="tabView.component" />
       </div>
-    </resizable-panel>
+    </div>
     <ide-sidebar-nav
       :tabs="tabs"
       :side="side"
diff --git a/app/assets/javascripts/ide/components/panes/right.vue b/app/assets/javascripts/ide/components/panes/right.vue
index 4a9de9e0c03..caa05daf8bd 100644
--- a/app/assets/javascripts/ide/components/panes/right.vue
+++ b/app/assets/javascripts/ide/components/panes/right.vue
@@ -2,15 +2,20 @@
 import { mapGetters, mapState } from 'vuex';
 import { __ } from '~/locale';
 import CollapsibleSidebar from './collapsible_sidebar.vue';
-import { rightSidebarViews } from '../../constants';
+import ResizablePanel from '../resizable_panel.vue';
+import { rightSidebarViews, SIDEBAR_INIT_WIDTH, SIDEBAR_NAV_WIDTH } from '../../constants';
 import PipelinesList from '../pipelines/list.vue';
 import JobsDetail from '../jobs/detail.vue';
 import Clientside from '../preview/clientside.vue';
 
+// Need to add the width of the nav buttons since the resizable container contains those as well
+const WIDTH = SIDEBAR_INIT_WIDTH + SIDEBAR_NAV_WIDTH;
+
 export default {
   name: 'RightPane',
   components: {
     CollapsibleSidebar,
+    ResizablePanel,
   },
   props: {
     extensionTabs: {
@@ -22,6 +27,7 @@ export default {
   computed: {
     ...mapState(['currentMergeRequestId', 'clientsidePreviewEnabled']),
     ...mapGetters(['packageJson']),
+    ...mapState('rightPane', ['isOpen']),
     showLivePreview() {
       return this.packageJson && this.clientsidePreviewEnabled;
     },
@@ -46,9 +52,18 @@ export default {
       ];
     },
   },
+  WIDTH,
 };
 </script>
 
 <template>
-  <collapsible-sidebar :extension-tabs="rightExtensionTabs" side="right" :width="350" />
+  <resizable-panel
+    class="gl-display-flex gl-overflow-hidden"
+    side="right"
+    :initial-width="$options.WIDTH"
+    :min-size="$options.WIDTH"
+    :resizable="isOpen"
+  >
+    <collapsible-sidebar class="gl-w-full" :extension-tabs="rightExtensionTabs" side="right" />
+  </resizable-panel>
 </template>
diff --git a/app/assets/javascripts/ide/components/resizable_panel.vue b/app/assets/javascripts/ide/components/resizable_panel.vue
index d55150f48ad..b49d743d877 100644
--- a/app/assets/javascripts/ide/components/resizable_panel.vue
+++ b/app/assets/javascripts/ide/components/resizable_panel.vue
@@ -1,7 +1,7 @@
 <script>
 import { mapActions } from 'vuex';
 import PanelResizer from '~/vue_shared/components/panel_resizer.vue';
-import { DEFAULT_SIDEBAR_MIN_WIDTH } from '../constants';
+import { SIDEBAR_MIN_WIDTH } from '../constants';
 
 export default {
   components: {
@@ -15,12 +15,17 @@ export default {
     minSize: {
       type: Number,
       required: false,
-      default: DEFAULT_SIDEBAR_MIN_WIDTH,
+      default: SIDEBAR_MIN_WIDTH,
     },
     side: {
       type: String,
       required: true,
     },
+    resizable: {
+      type: Boolean,
+      required: false,
+      default: true,
+    },
   },
   data() {
     return {
@@ -29,7 +34,7 @@ export default {
   },
   computed: {
     panelStyle() {
-      if (!this.collapsed) {
+      if (this.resizable) {
         return {
           width: `${this.width}px`,
         };
@@ -46,9 +51,10 @@ export default {
 </script>
 
 <template>
-  <div :style="panelStyle">
+  <div class="gl-relative" :style="panelStyle">
     <slot></slot>
     <panel-resizer
+      v-show="resizable"
       :size.sync="width"
       :start-size="initialWidth"
       :min-size="minSize"
diff --git a/app/assets/javascripts/ide/constants.js b/app/assets/javascripts/ide/constants.js
index bc2cb3fdadc..555754c7104 100644
--- a/app/assets/javascripts/ide/constants.js
+++ b/app/assets/javascripts/ide/constants.js
@@ -4,8 +4,9 @@ export const MAX_WINDOW_HEIGHT_COMPACT = 750;
 export const MAX_TITLE_LENGTH = 50;
 export const MAX_BODY_LENGTH = 72;
 
-export const LEFT_SIDEBAR_INIT_WIDTH = 340;
-export const DEFAULT_SIDEBAR_MIN_WIDTH = 340;
+export const SIDEBAR_INIT_WIDTH = 340;
+export const SIDEBAR_MIN_WIDTH = 340;
+export const SIDEBAR_NAV_WIDTH = 60;
 
 // File view modes
 export const FILE_VIEW_MODE_EDITOR = 'editor';
diff --git a/app/assets/javascripts/operation_settings/components/external_dashboard.vue b/app/assets/javascripts/operation_settings/components/external_dashboard.vue
deleted file mode 100644
index e9c7d7c5d56..00000000000
--- a/app/assets/javascripts/operation_settings/components/external_dashboard.vue
+++ /dev/null
@@ -1,72 +0,0 @@
-<script>
-import { mapState, mapActions } from 'vuex';
-import { GlDeprecatedButton, GlFormGroup, GlFormInput, GlLink } from '@gitlab/ui';
-
-export default {
-  components: {
-    GlDeprecatedButton,
-    GlFormGroup,
-    GlFormInput,
-    GlLink,
-  },
-  computed: {
-    ...mapState([
-      'externalDashboardHelpPagePath',
-      'externalDashboardUrl',
-      'operationsSettingsEndpoint',
-    ]),
-    userDashboardUrl: {
-      get() {
-        return this.externalDashboardUrl;
-      },
-      set(url) {
-        this.setExternalDashboardUrl(url);
-      },
-    },
-  },
-  methods: {
-    ...mapActions(['setExternalDashboardUrl', 'updateExternalDashboardUrl']),
-  },
-};
-</script>
-
-<template>
-  <section class="settings no-animate">
-    <div class="settings-header">
-      <h3 class="js-section-header h4">
-        {{ s__('ExternalMetrics|External Dashboard') }}
-      </h3>
-      <gl-deprecated-button class="js-settings-toggle">{{ __('Expand') }}</gl-deprecated-button>
-      <p class="js-section-sub-header">
-        {{
-          s__(
-            'ExternalMetrics|Add a button to the metrics dashboard linking directly to your existing external dashboards.',
-          )
-        }}
-        <gl-link :href="externalDashboardHelpPagePath">{{ __('Learn more') }}</gl-link>
-      </p>
-    </div>
-    <div class="settings-content">
-      <form>
-        <gl-form-group
-          :label="s__('ExternalMetrics|Full dashboard URL')"
-          label-for="full-dashboard-url"
-          :description="s__('ExternalMetrics|Enter the URL of the dashboard you want to link to')"
-        >
-          <!-- placeholder with a url is a false positive  -->
-          <!-- eslint-disable @gitlab/vue-require-i18n-attribute-strings -->
-          <gl-form-input
-            id="full-dashboard-url"
-            v-model="userDashboardUrl"
-            placeholder="https://my-org.gitlab.io/my-dashboards"
-            @keydown.enter.native.prevent="updateExternalDashboardUrl"
-          />
-          <!-- eslint-enable @gitlab/vue-require-i18n-attribute-strings -->
-        </gl-form-group>
-        <gl-deprecated-button variant="success" @click="updateExternalDashboardUrl">
-          {{ __('Save Changes') }}
-        </gl-deprecated-button>
-      </form>
-    </div>
-  </section>
-</template>
diff --git a/app/assets/javascripts/operation_settings/components/form_group/external_dashboard.vue b/app/assets/javascripts/operation_settings/components/form_group/external_dashboard.vue
new file mode 100644
index 00000000000..8f8e7db783d
--- /dev/null
+++ b/app/assets/javascripts/operation_settings/components/form_group/external_dashboard.vue
@@ -0,0 +1,50 @@
+<script>
+import { mapState, mapActions } from 'vuex';
+import { GlLink, GlFormGroup, GlFormInput } from '@gitlab/ui';
+
+export default {
+  components: {
+    GlLink,
+    GlFormGroup,
+    GlFormInput,
+  },
+  computed: {
+    ...mapState(['externalDashboard']),
+    userDashboardUrl: {
+      get() {
+        return this.externalDashboard.url;
+      },
+      set(url) {
+        this.setExternalDashboardUrl(url);
+      },
+    },
+  },
+  methods: {
+    ...mapActions(['setExternalDashboardUrl']),
+  },
+};
+</script>
+
+<template>
+  <gl-form-group
+    :label="s__('MetricsSettings|External dashboard URL')"
+    label-for="external-dashboard-url"
+  >
+    <template #description>
+      {{
+        s__(
+          'MetricsSettings|Add a button to the metrics dashboard linking directly to your existing external dashboard.',
+        )
+      }}
+      <gl-link :href="externalDashboard.helpPage">{{ __('Learn more') }}</gl-link>
+    </template>
+    <!-- placeholder with a url is a false positive  -->
+    <!-- eslint-disable @gitlab/vue-require-i18n-attribute-strings -->
+    <gl-form-input
+      id="external-dashboard-url"
+      v-model="userDashboardUrl"
+      placeholder="https://my-org.gitlab.io/my-dashboards"
+    />
+    <!-- eslint-enable @gitlab/vue-require-i18n-attribute-strings -->
+  </gl-form-group>
+</template>
diff --git a/app/assets/javascripts/operation_settings/components/metrics_settings.vue b/app/assets/javascripts/operation_settings/components/metrics_settings.vue
new file mode 100644
index 00000000000..ebf486162fc
--- /dev/null
+++ b/app/assets/javascripts/operation_settings/components/metrics_settings.vue
@@ -0,0 +1,50 @@
+<script>
+import { mapState, mapActions } from 'vuex';
+import { GlDeprecatedButton, GlLink } from '@gitlab/ui';
+import ExternalDashboard from './form_group/external_dashboard.vue';
+
+export default {
+  components: {
+    GlDeprecatedButton,
+    GlLink,
+    ExternalDashboard,
+  },
+  computed: {
+    ...mapState(['helpPage']),
+    userDashboardUrl: {
+      get() {
+        return this.externalDashboard.url;
+      },
+      set(url) {
+        this.setExternalDashboardUrl(url);
+      },
+    },
+  },
+  methods: {
+    ...mapActions(['saveChanges']),
+  },
+};
+</script>
+
+<template>
+  <section class="settings no-animate">
+    <div class="settings-header">
+      <h3 class="js-section-header h4">
+        {{ s__('MetricsSettings|Metrics Dashboard') }}
+      </h3>
+      <gl-deprecated-button class="js-settings-toggle">{{ __('Expand') }}</gl-deprecated-button>
+      <p class="js-section-sub-header">
+        {{ s__('MetricsSettings|Manage Metrics Dashboard settings.') }}
+        <gl-link :href="helpPage">{{ __('Learn more') }}</gl-link>
+      </p>
+    </div>
+    <div class="settings-content">
+      <form>
+        <external-dashboard />
+        <gl-deprecated-button variant="success" @click="saveChanges">
+          {{ __('Save Changes') }}
+        </gl-deprecated-button>
+      </form>
+    </div>
+  </section>
+</template>
diff --git a/app/assets/javascripts/operation_settings/index.js b/app/assets/javascripts/operation_settings/index.js
index f075291ce98..426a060949e 100644
--- a/app/assets/javascripts/operation_settings/index.js
+++ b/app/assets/javascripts/operation_settings/index.js
@@ -1,6 +1,6 @@
 import Vue from 'vue';
 import store from './store';
-import ExternalDashboardForm from './components/external_dashboard.vue';
+import MetricsSettingsForm from './components/metrics_settings.vue';
 
 export default () => {
   const el = document.querySelector('.js-operation-settings');
@@ -9,7 +9,7 @@ export default () => {
     el,
     store: store(el.dataset),
     render(createElement) {
-      return createElement(ExternalDashboardForm);
+      return createElement(MetricsSettingsForm);
     },
   });
 };
diff --git a/app/assets/javascripts/operation_settings/store/actions.js b/app/assets/javascripts/operation_settings/store/actions.js
index ec05b0c76cf..62d00ac50e3 100644
--- a/app/assets/javascripts/operation_settings/store/actions.js
+++ b/app/assets/javascripts/operation_settings/store/actions.js
@@ -7,19 +7,19 @@ import * as mutationTypes from './mutation_types';
 export const setExternalDashboardUrl = ({ commit }, url) =>
   commit(mutationTypes.SET_EXTERNAL_DASHBOARD_URL, url);
 
-export const updateExternalDashboardUrl = ({ state, dispatch }) =>
+export const saveChanges = ({ state, dispatch }) =>
   axios
     .patch(state.operationsSettingsEndpoint, {
       project: {
         metrics_setting_attributes: {
-          external_dashboard_url: state.externalDashboardUrl,
+          external_dashboard_url: state.externalDashboard.url,
         },
       },
     })
-    .then(() => dispatch('receiveExternalDashboardUpdateSuccess'))
-    .catch(error => dispatch('receiveExternalDashboardUpdateError', error));
+    .then(() => dispatch('receiveSaveChangesSuccess'))
+    .catch(error => dispatch('receiveSaveChangesError', error));
 
-export const receiveExternalDashboardUpdateSuccess = () => {
+export const receiveSaveChangesSuccess = () => {
   /**
    * The operations_controller currently handles successful requests
    * by creating a flash banner messsage to notify the user.
@@ -27,8 +27,8 @@ export const receiveExternalDashboardUpdateSuccess = () => {
   refreshCurrentPage();
 };
 
-export const receiveExternalDashboardUpdateError = (_, error) => {
-  const { response } = error;
+export const receiveSaveChangesError = (_, error) => {
+  const { response = {} } = error;
   const message = response.data && response.data.message ? response.data.message : '';
 
   createFlash(`${__('There was an error saving your changes.')} ${message}`, 'alert');
diff --git a/app/assets/javascripts/operation_settings/store/mutations.js b/app/assets/javascripts/operation_settings/store/mutations.js
index 64bb33bb89f..eb495839616 100644
--- a/app/assets/javascripts/operation_settings/store/mutations.js
+++ b/app/assets/javascripts/operation_settings/store/mutations.js
@@ -2,6 +2,6 @@ import * as types from './mutation_types';
 
 export default {
   [types.SET_EXTERNAL_DASHBOARD_URL](state, url) {
-    state.externalDashboardUrl = url;
+    state.externalDashboard.url = url;
   },
 };
diff --git a/app/assets/javascripts/operation_settings/store/state.js b/app/assets/javascripts/operation_settings/store/state.js
index 72167141c48..5376f6b32e6 100644
--- a/app/assets/javascripts/operation_settings/store/state.js
+++ b/app/assets/javascripts/operation_settings/store/state.js
@@ -1,5 +1,8 @@
 export default (initialState = {}) => ({
-  externalDashboardUrl: initialState.externalDashboardUrl || '',
   operationsSettingsEndpoint: initialState.operationsSettingsEndpoint,
-  externalDashboardHelpPagePath: initialState.externalDashboardHelpPagePath,
+  helpPage: initialState.helpPage,
+  externalDashboard: {
+    url: initialState.externalDashboardUrl,
+    helpPage: initialState.externalDashboardHelpPage,
+  },
 });
diff --git a/app/assets/stylesheets/page_bundles/ide.scss b/app/assets/stylesheets/page_bundles/ide.scss
index ddfdf8d0553..199778a8529 100644
--- a/app/assets/stylesheets/page_bundles/ide.scss
+++ b/app/assets/stylesheets/page_bundles/ide.scss
@@ -282,7 +282,6 @@ $ide-commit-header-height: 48px;
 .multi-file-commit-panel {
   display: flex;
   position: relative;
-  width: 340px;
   padding: 0;
   background-color: var(--ide-background, $gray-light);
 
@@ -874,13 +873,11 @@ $ide-commit-header-height: 48px;
 }
 
 .ide-sidebar {
-  width: auto;
   min-width: 60px;
 }
 
 .ide-right-sidebar {
   .multi-file-commit-panel-inner {
-    width: 350px;
     padding: $grid-size 0;
     background-color: var(--ide-highlight-background, $white);
     border-right: 1px solid var(--ide-border-color, $white-dark);
diff --git a/app/controllers/dashboard/todos_controller.rb b/app/controllers/dashboard/todos_controller.rb
index ebee8e9094e..8a8064b24c2 100644
--- a/app/controllers/dashboard/todos_controller.rb
+++ b/app/controllers/dashboard/todos_controller.rb
@@ -17,7 +17,9 @@ class Dashboard::TodosController < Dashboard::ApplicationController
   end
 
   def destroy
-    TodoService.new.mark_todos_as_done_by_ids(params[:id], current_user)
+    todo = current_user.todos.find(params[:id])
+
+    TodoService.new.resolve_todo(todo, current_user, resolved_by_action: :mark_done)
 
     respond_to do |format|
       format.html do
@@ -31,7 +33,7 @@ class Dashboard::TodosController < Dashboard::ApplicationController
   end
 
   def destroy_all
-    updated_ids = TodoService.new.mark_todos_as_done(@todos, current_user)
+    updated_ids = TodoService.new.resolve_todos(@todos, current_user, resolved_by_action: :mark_all_done)
 
     respond_to do |format|
       format.html { redirect_to dashboard_todos_path, status: :found, notice: _('Everything on your to-do list is marked as done.') }
@@ -41,13 +43,13 @@ class Dashboard::TodosController < Dashboard::ApplicationController
   end
 
   def restore
-    TodoService.new.mark_todos_as_pending_by_ids(params[:id], current_user)
+    TodoService.new.restore_todo(current_user.todos.find(params[:id]), current_user)
 
     render json: todos_counts
   end
 
   def bulk_restore
-    TodoService.new.mark_todos_as_pending_by_ids(params[:ids], current_user)
+    TodoService.new.restore_todos(current_user.todos.for_ids(params[:ids]), current_user)
 
     render json: todos_counts
   end
diff --git a/app/graphql/mutations/todos/mark_all_done.rb b/app/graphql/mutations/todos/mark_all_done.rb
index 5694985717c..d30d1bcbcf0 100644
--- a/app/graphql/mutations/todos/mark_all_done.rb
+++ b/app/graphql/mutations/todos/mark_all_done.rb
@@ -28,7 +28,9 @@ module Mutations
       def mark_all_todos_done
         return [] unless current_user
 
-        TodoService.new.mark_all_todos_as_done_by_user(current_user)
+        todos = TodosFinder.new(current_user).execute
+
+        TodoService.new.resolve_todos(todos, current_user, resolved_by_action: :api_all_done)
       end
     end
   end
diff --git a/app/graphql/mutations/todos/mark_done.rb b/app/graphql/mutations/todos/mark_done.rb
index d738e387c43..748e02d8782 100644
--- a/app/graphql/mutations/todos/mark_done.rb
+++ b/app/graphql/mutations/todos/mark_done.rb
@@ -30,7 +30,7 @@ module Mutations
       private
 
       def mark_done(todo)
-        TodoService.new.mark_todo_as_done(todo, current_user)
+        TodoService.new.resolve_todo(todo, current_user, resolved_by_action: :api_done)
       end
     end
   end
diff --git a/app/graphql/mutations/todos/restore.rb b/app/graphql/mutations/todos/restore.rb
index c4597bd84a2..a0a1772db0a 100644
--- a/app/graphql/mutations/todos/restore.rb
+++ b/app/graphql/mutations/todos/restore.rb
@@ -18,7 +18,7 @@ module Mutations
 
       def resolve(id:)
         todo = authorized_find!(id: id)
-        restore(todo.id) if todo.done?
+        restore(todo)
 
         {
           todo: todo.reset,
@@ -28,8 +28,8 @@ module Mutations
 
       private
 
-      def restore(id)
-        TodoService.new.mark_todos_as_pending_by_ids([id], current_user)
+      def restore(todo)
+        TodoService.new.restore_todo(todo, current_user)
       end
     end
   end
diff --git a/app/graphql/mutations/todos/restore_many.rb b/app/graphql/mutations/todos/restore_many.rb
index 8a6265207cd..e95651b232f 100644
--- a/app/graphql/mutations/todos/restore_many.rb
+++ b/app/graphql/mutations/todos/restore_many.rb
@@ -68,7 +68,7 @@ module Mutations
       end
 
       def restore(todos)
-        TodoService.new.mark_todos_as_pending(todos, current_user)
+        TodoService.new.restore_todos(todos, current_user)
       end
     end
   end
diff --git a/app/models/todo.rb b/app/models/todo.rb
index b5ca2ec7466..3af2d16deaa 100644
--- a/app/models/todo.rb
+++ b/app/models/todo.rb
@@ -66,6 +66,8 @@ class Todo < ApplicationRecord
   scope :with_entity_associations, -> { preload(:target, :author, :note, group: :route, project: [:route, { namespace: :route }]) }
   scope :joins_issue_and_assignees, -> { left_joins(issue: :assignees) }
 
+  enum resolved_by_action: { system_done: 0, api_all_done: 1, api_done: 2, mark_all_done: 3, mark_done: 4 }, _prefix: :resolved_by
+
   state_machine :state, initial: :pending do
     event :done do
       transition [:pending] => :done
@@ -100,17 +102,17 @@ class Todo < ApplicationRecord
       state.nil? ? exists?(target: target) : exists?(target: target, state: state)
     end
 
-    # Updates the state of a relation of todos to the new state.
+    # Updates attributes of a relation of todos to the new state.
     #
-    # new_state - The new state of the todos.
+    # new_attributes - The new attributes of the todos.
     #
     # Returns an `Array` containing the IDs of the updated todos.
-    def update_state(new_state)
-      # Only update those that are not really on that state
-      base = where.not(state: new_state).except(:order)
+    def batch_update(**new_attributes)
+      # Only update those that have different state
+      base = where.not(state: new_attributes[:state]).except(:order)
       ids = base.pluck(:id)
 
-      base.update_all(state: new_state, updated_at: Time.current)
+      base.update_all(new_attributes.merge(updated_at: Time.current))
 
       ids
     end
diff --git a/app/models/user.rb b/app/models/user.rb
index 4311d2e37b1..e2455e667be 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1636,10 +1636,6 @@ class User < ApplicationRecord
     super.presence || build_user_detail
   end
 
-  def todos_limited_to(ids)
-    todos.where(id: ids)
-  end
-
   def pending_todo_for(target)
     todos.find_by(target: target, state: :pending)
   end
diff --git a/app/services/issuable_base_service.rb b/app/services/issuable_base_service.rb
index 18062bd60da..3fa5b60369c 100644
--- a/app/services/issuable_base_service.rb
+++ b/app/services/issuable_base_service.rb
@@ -350,7 +350,7 @@ class IssuableBaseService < BaseService
       todo_service.mark_todo(issuable, current_user)
     when 'done'
       todo = TodosFinder.new(current_user).find_by(target: issuable)
-      todo_service.mark_todos_as_done_by_ids(todo, current_user) if todo
+      todo_service.resolve_todo(todo, current_user) if todo
     end
   end
   # rubocop: enable CodeReuse/ActiveRecord
diff --git a/app/services/issues/update_service.rb b/app/services/issues/update_service.rb
index ee1a22634af..d59bc0cc970 100644
--- a/app/services/issues/update_service.rb
+++ b/app/services/issues/update_service.rb
@@ -32,7 +32,7 @@ module Issues
       old_assignees = old_associations.fetch(:assignees, [])
 
       if has_changes?(issue, old_labels: old_labels, old_assignees: old_assignees)
-        todo_service.mark_pending_todos_as_done(issue, current_user)
+        todo_service.resolve_todos_for_target(issue, current_user)
       end
 
       if issue.previous_changes.include?('title') ||
@@ -68,7 +68,7 @@ module Issues
     end
 
     def handle_task_changes(issuable)
-      todo_service.mark_pending_todos_as_done(issuable, current_user)
+      todo_service.resolve_todos_for_target(issuable, current_user)
       todo_service.update_issue(issuable, current_user)
     end
 
diff --git a/app/services/merge_requests/update_service.rb b/app/services/merge_requests/update_service.rb
index 2d33e87bf4b..561695baeab 100644
--- a/app/services/merge_requests/update_service.rb
+++ b/app/services/merge_requests/update_service.rb
@@ -27,7 +27,7 @@ module MergeRequests
       old_assignees = old_associations.fetch(:assignees, [])
 
       if has_changes?(merge_request, old_labels: old_labels, old_assignees: old_assignees)
-        todo_service.mark_pending_todos_as_done(merge_request, current_user)
+        todo_service.resolve_todos_for_target(merge_request, current_user)
       end
 
       if merge_request.previous_changes.include?('title') ||
@@ -73,7 +73,7 @@ module MergeRequests
     end
 
     def handle_task_changes(merge_request)
-      todo_service.mark_pending_todos_as_done(merge_request, current_user)
+      todo_service.resolve_todos_for_target(merge_request, current_user)
       todo_service.update_merge_request(merge_request, current_user)
     end
 
diff --git a/app/services/todo_service.rb b/app/services/todo_service.rb
index 55f888d5664..9a1934b322f 100644
--- a/app/services/todo_service.rb
+++ b/app/services/todo_service.rb
@@ -30,7 +30,7 @@ class TodoService
   #  * mark all pending todos related to the target for the current user as done
   #
   def close_issue(issue, current_user)
-    mark_pending_todos_as_done(issue, current_user)
+    resolve_todos_for_target(issue, current_user)
   end
 
   # When we destroy a todo target we should:
@@ -79,7 +79,7 @@ class TodoService
   #  * mark all pending todos related to the target for the current user as done
   #
   def close_merge_request(merge_request, current_user)
-    mark_pending_todos_as_done(merge_request, current_user)
+    resolve_todos_for_target(merge_request, current_user)
   end
 
   # When merge a merge request we should:
@@ -87,7 +87,7 @@ class TodoService
   #  * mark all pending todos related to the target for the current user as done
   #
   def merge_merge_request(merge_request, current_user)
-    mark_pending_todos_as_done(merge_request, current_user)
+    resolve_todos_for_target(merge_request, current_user)
   end
 
   # When a build fails on the HEAD of a merge request we should:
@@ -105,7 +105,7 @@ class TodoService
   #  * mark all pending todos related to the merge request for that user as done
   #
   def merge_request_push(merge_request, current_user)
-    mark_pending_todos_as_done(merge_request, current_user)
+    resolve_todos_for_target(merge_request, current_user)
   end
 
   # When a build is retried to a merge request we should:
@@ -114,7 +114,7 @@ class TodoService
   #
   def merge_request_build_retried(merge_request)
     merge_request.merge_participants.each do |user|
-      mark_pending_todos_as_done(merge_request, user)
+      resolve_todos_for_target(merge_request, user)
     end
   end
 
@@ -151,50 +151,7 @@ class TodoService
   #  * mark all pending todos related to the awardable for the current user as done
   #
   def new_award_emoji(awardable, current_user)
-    mark_pending_todos_as_done(awardable, current_user)
-  end
-
-  # When marking pending todos as done we should:
-  #
-  #  * mark all pending todos related to the target for the current user as done
-  #
-  def mark_pending_todos_as_done(target, user)
-    attributes = attributes_for_target(target)
-    pending_todos(user, attributes).update_all(state: :done)
-    user.update_todos_count_cache
-  end
-
-  # When user marks some todos as done
-  def mark_todos_as_done(todos, current_user)
-    update_todos_state(todos, current_user, :done)
-  end
-
-  def mark_todos_as_done_by_ids(ids, current_user)
-    todos = todos_by_ids(ids, current_user)
-    mark_todos_as_done(todos, current_user)
-  end
-
-  def mark_all_todos_as_done_by_user(current_user)
-    todos = TodosFinder.new(current_user).execute
-    mark_todos_as_done(todos, current_user)
-  end
-
-  def mark_todo_as_done(todo, current_user)
-    return if todo.done?
-
-    todo.update(state: :done)
-
-    current_user.update_todos_count_cache
-  end
-
-  # When user marks some todos as pending
-  def mark_todos_as_pending(todos, current_user)
-    update_todos_state(todos, current_user, :pending)
-  end
-
-  def mark_todos_as_pending_by_ids(ids, current_user)
-    todos = todos_by_ids(ids, current_user)
-    mark_todos_as_pending(todos, current_user)
+    resolve_todos_for_target(awardable, current_user)
   end
 
   # When user marks an issue as todo
@@ -207,20 +164,47 @@ class TodoService
     TodosFinder.new(current_user).any_for_target?(issuable, :pending)
   end
 
-  private
+  # Resolves all todos related to target
+  def resolve_todos_for_target(target, current_user)
+    attributes = attributes_for_target(target)
 
-  def todos_by_ids(ids, current_user)
-    current_user.todos_limited_to(Array(ids))
+    resolve_todos(pending_todos(current_user, attributes), current_user)
   end
 
-  def update_todos_state(todos, current_user, state)
-    todos_ids = todos.update_state(state)
+  def resolve_todos(todos, current_user, resolution: :done, resolved_by_action: :system_done)
+    todos_ids = todos.batch_update(state: resolution, resolved_by_action: resolved_by_action)
 
     current_user.update_todos_count_cache
 
     todos_ids
   end
 
+  def resolve_todo(todo, current_user, resolution: :done, resolved_by_action: :system_done)
+    return if todo.done?
+
+    todo.update(state: resolution, resolved_by_action: resolved_by_action)
+
+    current_user.update_todos_count_cache
+  end
+
+  def restore_todos(todos, current_user)
+    todos_ids = todos.batch_update(state: :pending)
+
+    current_user.update_todos_count_cache
+
+    todos_ids
+  end
+
+  def restore_todo(todo, current_user)
+    return if todo.pending?
+
+    todo.update(state: :pending)
+
+    current_user.update_todos_count_cache
+  end
+
+  private
+
   def create_todos(users, attributes)
     Array(users).map do |user|
       next if pending_todos(user, attributes).exists?
@@ -252,9 +236,9 @@ class TodoService
     return unless note.can_create_todo?
 
     project = note.project
-    target  = note.noteable
+    target = note.noteable
 
-    mark_pending_todos_as_done(target, author)
+    resolve_todos_for_target(target, author)
     create_mention_todos(project, target, author, note, skip_users)
   end
 
diff --git a/app/views/projects/settings/operations/_external_dashboard.html.haml b/app/views/projects/settings/operations/_external_dashboard.html.haml
deleted file mode 100644
index 08d50a336fd..00000000000
--- a/app/views/projects/settings/operations/_external_dashboard.html.haml
+++ /dev/null
@@ -1,3 +0,0 @@
-.js-operation-settings{ data: { operations_settings_endpoint: project_settings_operations_path(@project),
-  external_dashboard: { url: metrics_external_dashboard_url,
-  help_page_path: help_page_path('user/project/operations/linking_to_an_external_dashboard') } } }
diff --git a/app/views/projects/settings/operations/_metrics_dashboard.html.haml b/app/views/projects/settings/operations/_metrics_dashboard.html.haml
new file mode 100644
index 00000000000..eda8a52f188
--- /dev/null
+++ b/app/views/projects/settings/operations/_metrics_dashboard.html.haml
@@ -0,0 +1,5 @@
+.js-operation-settings{ data: { operations_settings_endpoint: project_settings_operations_path(@project),
+  help_page: help_page_path('user/project/integrations/prometheus'),
+  external_dashboard: { url: metrics_external_dashboard_url,
+    help_page: help_page_path('user/project/operations/linking_to_an_external_dashboard'),
+  } } }
diff --git a/app/views/projects/settings/operations/show.html.haml b/app/views/projects/settings/operations/show.html.haml
index ee47d70171b..9e4fbf81ca4 100644
--- a/app/views/projects/settings/operations/show.html.haml
+++ b/app/views/projects/settings/operations/show.html.haml
@@ -5,7 +5,7 @@
 = render 'projects/settings/operations/incidents'
 = render 'projects/settings/operations/error_tracking'
 = render 'projects/settings/operations/prometheus', service: prometheus_service if Feature.enabled?(:settings_operations_prometheus_service)
-= render 'projects/settings/operations/external_dashboard'
+= render 'projects/settings/operations/metrics_dashboard'
 = render 'projects/settings/operations/grafana_integration'
 = render_if_exists 'projects/settings/operations/tracing'
 = render_if_exists 'projects/settings/operations/status_page'
diff --git a/changelogs/unreleased/214370-extend-metrics-settings.yml b/changelogs/unreleased/214370-extend-metrics-settings.yml
new file mode 100644
index 00000000000..56045e3cb5d
--- /dev/null
+++ b/changelogs/unreleased/214370-extend-metrics-settings.yml
@@ -0,0 +1,5 @@
+---
+title: Update operations metrics settings title and description to make them general
+merge_request: 32494
+author:
+type: changed
diff --git a/changelogs/unreleased/216045-capture-todo-resolution.yml b/changelogs/unreleased/216045-capture-todo-resolution.yml
new file mode 100644
index 00000000000..cc43635a120
--- /dev/null
+++ b/changelogs/unreleased/216045-capture-todo-resolution.yml
@@ -0,0 +1,5 @@
+---
+title: Store Todo resolution method
+merge_request: 32753
+author:
+type: added
diff --git a/changelogs/unreleased/docs-u2f-version-history.yml b/changelogs/unreleased/docs-u2f-version-history.yml
new file mode 100644
index 00000000000..e847faa317e
--- /dev/null
+++ b/changelogs/unreleased/docs-u2f-version-history.yml
@@ -0,0 +1,5 @@
+---
+title: Add version history information on U2F support
+merge_request: 33229
+author: Takuya Noguchi
+type: other
diff --git a/changelogs/unreleased/kborges-github-import-rake-add-rate-limit-doc.yml b/changelogs/unreleased/kborges-github-import-rake-add-rate-limit-doc.yml
new file mode 100644
index 00000000000..5d797b0f7a1
--- /dev/null
+++ b/changelogs/unreleased/kborges-github-import-rake-add-rate-limit-doc.yml
@@ -0,0 +1,5 @@
+---
+title: Document github rate limit behavior
+merge_request: 33090
+author:
+type: other
diff --git a/db/migrate/20200520103514_add_todo_resolved_by_action.rb b/db/migrate/20200520103514_add_todo_resolved_by_action.rb
new file mode 100644
index 00000000000..0aa91091451
--- /dev/null
+++ b/db/migrate/20200520103514_add_todo_resolved_by_action.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class AddTodoResolvedByAction < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def up
+    with_lock_retries do
+      add_column :todos, :resolved_by_action, :integer, limit: 2
+    end
+  end
+
+  def down
+    with_lock_retries do
+      remove_column :todos, :resolved_by_action
+    end
+  end
+end
diff --git a/db/structure.sql b/db/structure.sql
index 0f5065719da..a8192b2f78e 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -6520,7 +6520,8 @@ CREATE TABLE public.todos (
     updated_at timestamp without time zone,
     note_id integer,
     commit_id character varying,
-    group_id integer
+    group_id integer,
+    resolved_by_action smallint
 );
 
 CREATE SEQUENCE public.todos_id_seq
@@ -13949,6 +13950,7 @@ COPY "schema_migrations" (version) FROM STDIN;
 20200519115908
 20200519171058
 20200519194042
+20200520103514
 20200525114553
 20200525121014
 20200526120714
diff --git a/doc/.vale/gitlab/SentenceLength.yml b/doc/.vale/gitlab/SentenceLength.yml
old mode 100755
new mode 100644
diff --git a/doc/administration/raketasks/github_import.md b/doc/administration/raketasks/github_import.md
index 83a3d2c8884..a46a2b34687 100644
--- a/doc/administration/raketasks/github_import.md
+++ b/doc/administration/raketasks/github_import.md
@@ -12,6 +12,11 @@ Bear in mind that the syntax is very specific. Remove any spaces within the argu
 before/after the brackets. Also, some shells (for example, `zsh`) can interpret the open/close brackets
 (`[]`) separately. You may need to either escape the brackets or use double quotes.
 
+## Caveats
+
+If the GitHub [rate limit](https://developer.github.com/v3/#rate-limiting) is reached while importing,
+the importing process will wait (`sleep()`) until it can continue importing.
+
 ## Importing multiple projects
 
 To import a project from the list of your GitHub projects available:
diff --git a/doc/user/profile/account/two_factor_authentication.md b/doc/user/profile/account/two_factor_authentication.md
index 6a0f19d61b0..18f9fc59d7a 100644
--- a/doc/user/profile/account/two_factor_authentication.md
+++ b/doc/user/profile/account/two_factor_authentication.md
@@ -65,8 +65,11 @@ in a safe place.
 
 ### Enable 2FA via U2F device
 
+> Introduced in [GitLab 8.9](https://about.gitlab.com/blog/2016/06/22/gitlab-adds-support-for-u2f/).
+
 GitLab officially only supports [YubiKey](https://www.yubico.com/products/)
-U2F devices, but users have successfully used [SoloKeys](https://solokeys.com/).
+U2F devices, but users have successfully used [SoloKeys](https://solokeys.com/)
+or [Google Titan Security Key](https://cloud.google.com/titan-security-key).
 
 The U2F workflow is [supported by](https://caniuse.com/#search=U2F) the
 following desktop browsers:
diff --git a/lib/api/todos.rb b/lib/api/todos.rb
index 43ed9c96486..e36ddf21277 100644
--- a/lib/api/todos.rb
+++ b/lib/api/todos.rb
@@ -89,16 +89,18 @@ module API
         requires :id, type: Integer, desc: 'The ID of the todo being marked as done'
       end
       post ':id/mark_as_done' do
-        TodoService.new.mark_todos_as_done_by_ids(params[:id], current_user)
         todo = current_user.todos.find(params[:id])
 
+        TodoService.new.resolve_todo(todo, current_user, resolved_by_action: :api_done)
+
         present todo, with: Entities::Todo, current_user: current_user
       end
 
       desc 'Mark all todos as done'
       post '/mark_as_done' do
         todos = find_todos
-        TodoService.new.mark_todos_as_done(todos, current_user)
+
+        TodoService.new.resolve_todos(todos, current_user, resolved_by_action: :api_all_done)
 
         no_content!
       end
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index 20a26662b4a..1ecbda9c7f5 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -9119,18 +9119,6 @@ msgstr ""
 msgid "ExternalAuthorizationService|When no classification label is set the default label `%{default_label}` will be used."
 msgstr ""
 
-msgid "ExternalMetrics|Add a button to the metrics dashboard linking directly to your existing external dashboards."
-msgstr ""
-
-msgid "ExternalMetrics|Enter the URL of the dashboard you want to link to"
-msgstr ""
-
-msgid "ExternalMetrics|External Dashboard"
-msgstr ""
-
-msgid "ExternalMetrics|Full dashboard URL"
-msgstr ""
-
 msgid "ExternalWikiService|External Wiki"
 msgstr ""
 
@@ -13727,6 +13715,18 @@ msgstr ""
 msgid "Metrics::UsersStarredDashboards|You are not authorized to add star to this dashboard"
 msgstr ""
 
+msgid "MetricsSettings|Add a button to the metrics dashboard linking directly to your existing external dashboard."
+msgstr ""
+
+msgid "MetricsSettings|External dashboard URL"
+msgstr ""
+
+msgid "MetricsSettings|Manage Metrics Dashboard settings."
+msgstr ""
+
+msgid "MetricsSettings|Metrics Dashboard"
+msgstr ""
+
 msgid "Metrics|Add metric"
 msgstr ""
 
diff --git a/scripts/static-analysis b/scripts/static-analysis
index ede29b85b8d..9103a9c14af 100755
--- a/scripts/static-analysis
+++ b/scripts/static-analysis
@@ -5,103 +5,118 @@ require_relative '../lib/gitlab'
 require_relative '../lib/gitlab/popen'
 require_relative '../lib/gitlab/popen/runner'
 
-def emit_warnings(static_analysis)
-  static_analysis.warned_results.each do |result|
-    puts
-    puts "**** #{result.cmd.join(' ')} had the following warning(s):"
-    puts
-    puts result.stderr
-    puts
-  end
-end
+class StaticAnalysis
+  ALLOWED_WARNINGS = [
+    # https://github.com/browserslist/browserslist/blob/d0ec62eb48c41c218478cd3ac28684df051cc865/node.js#L329
+    # warns if caniuse-lite package is older than 6 months. Ignore this
+    # warning message so that GitLab backports don't fail.
+    "Browserslist: caniuse-lite is outdated. Please run next command `yarn upgrade`"
+  ].freeze
 
-def emit_errors(static_analysis)
-  static_analysis.failed_results.each do |result|
-    puts
-    puts "**** #{result.cmd.join(' ')} failed with the following error(s):"
-    puts
-    puts result.stdout
-    puts result.stderr
-    puts
-  end
-end
+  # `gettext:updated_check` and `gitlab:sidekiq:sidekiq_queues_yml:check` will fail on FOSS installations
+  # (e.g. gitlab-org/gitlab-foss) since they test against a single
+  # file that is generated by an EE installation, which can
+  # contain values that a FOSS installation won't find. To work
+  # around this we will only enable this task on EE installations.
+  TASKS_BY_DURATIONS_SECONDS_DESC = {
+    %w[bin/rake lint:haml] => 338,
+    (Gitlab.ee? ? %w[bin/rake gettext:updated_check] : nil) => 308,
+    # Most of the time, RuboCop finishes in 30 seconds, but sometimes it can take around 1200 seconds so we set a
+    # duration of 300 to lower the likelihood that it will run in the same job as another long task...
+    %w[bundle exec rubocop --parallel] => 300,
+    %w[yarn run eslint] => 197,
+    %w[yarn run prettier-all] => 124,
+    %w[bin/rake gettext:lint] => 96,
+    %w[bundle exec license_finder] => 49,
+    %w[bin/rake scss_lint] => 38,
+    %w[bin/rake lint:static_verification] => 22,
+    %w[bin/rake gitlab:sidekiq:all_queues_yml:check] => 13,
+    (Gitlab.ee? ? %w[bin/rake gitlab:sidekiq:sidekiq_queues_yml:check] : nil) => 13,
+    %w[bin/rake config_lint] => 11,
+    %w[yarn run stylelint] => 9,
+    %w[scripts/lint-conflicts.sh] => 0.59,
+    %w[yarn run block-dependencies] => 0.35,
+    %w[scripts/lint-rugged] => 0.23,
+    %w[scripts/gemfile_lock_changed.sh] => 0.02,
+    %w[scripts/frontend/check_no_partial_karma_jest.sh] => 0.01,
+    %w[scripts/lint-changelog-filenames] => 0.01
+  }.reject { |k| k.nil? }.sort_by { |a| -a[1] }.to_h.keys.freeze
 
-ALLOWED_WARNINGS = [
-  # https://github.com/browserslist/browserslist/blob/d0ec62eb48c41c218478cd3ac28684df051cc865/node.js#L329
-  # warns if caniuse-lite package is older than 6 months. Ignore this
-  # warning message so that GitLab backports don't fail.
-  "Browserslist: caniuse-lite is outdated. Please run next command `yarn upgrade`"
-].freeze
+  def run_tasks!
+    tasks = tasks_to_run((ENV['CI_NODE_INDEX'] || 1).to_i, (ENV['CI_NODE_TOTAL'] || 1).to_i)
 
-def warning_count(static_analysis)
-  static_analysis.warned_results
-    .count { |result| !ALLOWED_WARNINGS.include?(result.stderr.strip) }
-end
+    static_analysis = Gitlab::Popen::Runner.new
 
-def jobs_to_run(node_index, node_total)
-  all_tasks = [
-    %w[bin/rake lint:all],
-    %w[bundle exec license_finder],
-    %w[yarn run eslint],
-    %w[yarn run stylelint],
-    %w[yarn run prettier-all],
-    %w[yarn run block-dependencies],
-    %w[bundle exec rubocop --parallel],
-    %w[scripts/lint-conflicts.sh],
-    %w[scripts/lint-rugged],
-    %w[scripts/frontend/check_no_partial_karma_jest.sh],
-    %w[scripts/lint-changelog-filenames],
-    %w[scripts/gemfile_lock_changed.sh]
-  ]
+    static_analysis.run(tasks) do |cmd, &run|
+      puts
+      puts "$ #{cmd.join(' ')}"
 
-  case node_total
-  when 1
-    all_tasks
-  when 2
-    rake_lint_all, *rest_jobs = all_tasks
-    case node_index
-    when 1
-      [rake_lint_all]
-    else
-      rest_jobs
+      result = run.call
+
+      puts "==> Finished in #{result.duration} seconds"
+      puts
     end
-  else
-    raise "Parallelization > 2 (currently set to #{node_total}) isn't supported yet!"
+
+    puts
+    puts '==================================================='
+    puts
+    puts
+
+    if static_analysis.all_success_and_clean?
+      puts 'All static analyses passed successfully.'
+    elsif static_analysis.all_success?
+      puts 'All static analyses passed successfully, but we have warnings:'
+      puts
+
+      emit_warnings(static_analysis)
+
+      exit 2 if warning_count(static_analysis).nonzero?
+    else
+      puts 'Some static analyses failed:'
+
+      emit_warnings(static_analysis)
+      emit_errors(static_analysis)
+
+      exit 1
+    end
+  end
+
+  def emit_warnings(static_analysis)
+    static_analysis.warned_results.each do |result|
+      puts
+      puts "**** #{result.cmd.join(' ')} had the following warning(s):"
+      puts
+      puts result.stderr
+      puts
+    end
+  end
+
+  def emit_errors(static_analysis)
+    static_analysis.failed_results.each do |result|
+      puts
+      puts "**** #{result.cmd.join(' ')} failed with the following error(s):"
+      puts
+      puts result.stdout
+      puts result.stderr
+      puts
+    end
+  end
+
+  def warning_count(static_analysis)
+    static_analysis.warned_results
+      .count { |result| !ALLOWED_WARNINGS.include?(result.stderr.strip) }
+  end
+
+  def tasks_to_run(node_index, node_total)
+    tasks = []
+    TASKS_BY_DURATIONS_SECONDS_DESC.each_with_index do |task, i|
+      tasks << task if i % node_total == (node_index - 1)
+    end
+
+    tasks
   end
 end
 
-tasks = jobs_to_run((ENV['CI_NODE_INDEX'] || 1).to_i, (ENV['CI_NODE_TOTAL'] || 1).to_i)
-static_analysis = Gitlab::Popen::Runner.new
-
-static_analysis.run(tasks) do |cmd, &run|
-  puts
-  puts "$ #{cmd.join(' ')}"
-
-  result = run.call
-
-  puts "==> Finished in #{result.duration} seconds"
-  puts
-end
-
-puts
-puts '==================================================='
-puts
-puts
-
-if static_analysis.all_success_and_clean?
-  puts 'All static analyses passed successfully.'
-elsif static_analysis.all_success?
-  puts 'All static analyses passed successfully, but we have warnings:'
-  puts
-
-  emit_warnings(static_analysis)
-
-  exit 2 if warning_count(static_analysis).nonzero?
-else
-  puts 'Some static analyses failed:'
-
-  emit_warnings(static_analysis)
-  emit_errors(static_analysis)
-
-  exit 1
+if $0 == __FILE__
+  StaticAnalysis.new.run_tasks!
 end
diff --git a/spec/features/dashboard/todos/todos_spec.rb b/spec/features/dashboard/todos/todos_spec.rb
index 63867d5796a..c4f6d9a279f 100644
--- a/spec/features/dashboard/todos/todos_spec.rb
+++ b/spec/features/dashboard/todos/todos_spec.rb
@@ -114,7 +114,7 @@ describe 'Dashboard Todos' do
     context 'todo is stale on the page' do
       before do
         todos = TodosFinder.new(user, state: :pending).execute
-        TodoService.new.mark_todos_as_done(todos, user)
+        TodoService.new.resolve_todos(todos, user)
       end
 
       it_behaves_like 'deleting the todo'
diff --git a/spec/frontend/ide/components/resizable_panel_spec.js b/spec/frontend/ide/components/resizable_panel_spec.js
new file mode 100644
index 00000000000..7368de0cee7
--- /dev/null
+++ b/spec/frontend/ide/components/resizable_panel_spec.js
@@ -0,0 +1,114 @@
+import Vuex from 'vuex';
+import { shallowMount, createLocalVue } from '@vue/test-utils';
+import ResizablePanel from '~/ide/components/resizable_panel.vue';
+import PanelResizer from '~/vue_shared/components/panel_resizer.vue';
+import { SIDE_LEFT, SIDE_RIGHT } from '~/ide/constants';
+
+const TEST_WIDTH = 500;
+const TEST_MIN_WIDTH = 400;
+
+describe('~/ide/components/resizable_panel', () => {
+  const localVue = createLocalVue();
+  localVue.use(Vuex);
+
+  let wrapper;
+  let store;
+
+  beforeEach(() => {
+    store = new Vuex.Store({});
+    jest.spyOn(store, 'dispatch').mockImplementation();
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+    wrapper = null;
+  });
+
+  const createComponent = (props = {}) => {
+    wrapper = shallowMount(ResizablePanel, {
+      propsData: {
+        initialWidth: TEST_WIDTH,
+        minSize: TEST_MIN_WIDTH,
+        side: SIDE_LEFT,
+        ...props,
+      },
+      store,
+      localVue,
+    });
+  };
+  const findResizer = () => wrapper.find(PanelResizer);
+  const findInlineStyle = () => wrapper.element.style.cssText;
+  const createInlineStyle = width => `width: ${width}px;`;
+
+  describe.each`
+    props                                    | showResizer | resizerSide   | expectedStyle
+    ${{ resizable: true, side: SIDE_LEFT }}  | ${true}     | ${SIDE_RIGHT} | ${createInlineStyle(TEST_WIDTH)}
+    ${{ resizable: true, side: SIDE_RIGHT }} | ${true}     | ${SIDE_LEFT}  | ${createInlineStyle(TEST_WIDTH)}
+    ${{ resizable: false, side: SIDE_LEFT }} | ${false}    | ${SIDE_RIGHT} | ${''}
+  `('with props $props', ({ props, showResizer, resizerSide, expectedStyle }) => {
+    beforeEach(() => {
+      createComponent(props);
+    });
+
+    it(`show resizer is ${showResizer}`, () => {
+      const expectedDisplay = showResizer ? '' : 'none';
+      const resizer = findResizer();
+
+      expect(resizer.exists()).toBe(true);
+      expect(resizer.element.style.display).toBe(expectedDisplay);
+    });
+
+    it(`resizer side is '${resizerSide}'`, () => {
+      const resizer = findResizer();
+
+      expect(resizer.props('side')).toBe(resizerSide);
+    });
+
+    it(`has style '${expectedStyle}'`, () => {
+      expect(findInlineStyle()).toBe(expectedStyle);
+    });
+  });
+
+  describe('default', () => {
+    beforeEach(() => {
+      createComponent();
+    });
+
+    it('does not dispatch anything', () => {
+      expect(store.dispatch).not.toHaveBeenCalled();
+    });
+
+    it.each`
+      event             | dispatchArgs
+      ${'resize-start'} | ${['setResizingStatus', true]}
+      ${'resize-end'}   | ${['setResizingStatus', false]}
+    `('when resizer emits $event, dispatch $dispatchArgs', ({ event, dispatchArgs }) => {
+      const resizer = findResizer();
+
+      resizer.vm.$emit(event);
+
+      expect(store.dispatch).toHaveBeenCalledWith(...dispatchArgs);
+    });
+
+    it('renders resizer', () => {
+      const resizer = findResizer();
+
+      expect(resizer.props()).toMatchObject({
+        maxSize: window.innerWidth / 2,
+        minSize: TEST_MIN_WIDTH,
+        startSize: TEST_WIDTH,
+      });
+    });
+
+    it('when resizer emits update:size, changes inline width', () => {
+      const newSize = TEST_WIDTH - 100;
+      const resizer = findResizer();
+
+      resizer.vm.$emit('update:size', newSize);
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(findInlineStyle()).toBe(createInlineStyle(newSize));
+      });
+    });
+  });
+});
diff --git a/spec/frontend/operation_settings/components/external_dashboard_spec.js b/spec/frontend/operation_settings/components/metrics_settings_spec.js
similarity index 80%
rename from spec/frontend/operation_settings/components/external_dashboard_spec.js
rename to spec/frontend/operation_settings/components/metrics_settings_spec.js
index 19214d1d954..7b7cf841fb7 100644
--- a/spec/frontend/operation_settings/components/external_dashboard_spec.js
+++ b/spec/frontend/operation_settings/components/metrics_settings_spec.js
@@ -1,7 +1,8 @@
 import { mount, shallowMount } from '@vue/test-utils';
 import { GlDeprecatedButton, GlLink, GlFormGroup, GlFormInput } from '@gitlab/ui';
 import { TEST_HOST } from 'helpers/test_constants';
-import ExternalDashboard from '~/operation_settings/components/external_dashboard.vue';
+import MetricsSettings from '~/operation_settings/components/metrics_settings.vue';
+import ExternalDashboard from '~/operation_settings/components/form_group/external_dashboard.vue';
 import store from '~/operation_settings/store';
 import axios from '~/lib/utils/axios_utils';
 import { refreshCurrentPage } from '~/lib/utils/url_utility';
@@ -12,18 +13,25 @@ jest.mock('~/flash');
 
 describe('operation settings external dashboard component', () => {
   let wrapper;
+
   const operationsSettingsEndpoint = `${TEST_HOST}/mock/ops/settings/endpoint`;
+  const helpPage = `${TEST_HOST}/help/metrics/page/path`;
   const externalDashboardUrl = `http://mock-external-domain.com/external/dashboard/url`;
-  const externalDashboardHelpPagePath = `${TEST_HOST}/help/page/path`;
+  const externalDashboardHelpPage = `${TEST_HOST}/help/external/page/path`;
+
   const mountComponent = (shallow = true) => {
     const config = [
-      ExternalDashboard,
+      MetricsSettings,
       {
         store: store({
           operationsSettingsEndpoint,
+          helpPage,
           externalDashboardUrl,
-          externalDashboardHelpPagePath,
+          externalDashboardHelpPage,
         }),
+        stubs: {
+          ExternalDashboard,
+        },
       },
     ];
     wrapper = shallow ? shallowMount(...config) : mount(...config);
@@ -44,7 +52,7 @@ describe('operation settings external dashboard component', () => {
 
   it('renders header text', () => {
     mountComponent();
-    expect(wrapper.find('.js-section-header').text()).toBe('External Dashboard');
+    expect(wrapper.find('.js-section-header').text()).toBe('Metrics Dashboard');
   });
 
   describe('expand/collapse button', () => {
@@ -64,16 +72,14 @@ describe('operation settings external dashboard component', () => {
     });
 
     it('renders descriptive text', () => {
-      expect(subHeader.text()).toContain(
-        'Add a button to the metrics dashboard linking directly to your existing external dashboards.',
-      );
+      expect(subHeader.text()).toContain('Manage Metrics Dashboard settings.');
     });
 
     it('renders help page link', () => {
       const link = subHeader.find(GlLink);
 
       expect(link.text()).toBe('Learn more');
-      expect(link.attributes().href).toBe(externalDashboardHelpPagePath);
+      expect(link.attributes().href).toBe(helpPage);
     });
   });
 
@@ -82,18 +88,17 @@ describe('operation settings external dashboard component', () => {
       let formGroup;
 
       beforeEach(() => {
-        mountComponent();
-        formGroup = wrapper.find(GlFormGroup);
+        mountComponent(false);
+        formGroup = wrapper.find(ExternalDashboard).find(GlFormGroup);
       });
 
       it('uses label text', () => {
-        expect(formGroup.attributes().label).toBe('Full dashboard URL');
+        expect(formGroup.find('label').text()).toBe('External dashboard URL');
       });
 
       it('uses description text', () => {
-        expect(formGroup.attributes().description).toBe(
-          'Enter the URL of the dashboard you want to link to',
-        );
+        const description = formGroup.find('small');
+        expect(description.find('a').attributes('href')).toBe(externalDashboardHelpPage);
       });
     });
 
diff --git a/spec/frontend/operation_settings/store/mutations_spec.js b/spec/frontend/operation_settings/store/mutations_spec.js
index 1854142c89a..670ba95ab03 100644
--- a/spec/frontend/operation_settings/store/mutations_spec.js
+++ b/spec/frontend/operation_settings/store/mutations_spec.js
@@ -13,7 +13,7 @@ describe('operation settings mutations', () => {
       const mockUrl = 'mockUrl';
       mutations.SET_EXTERNAL_DASHBOARD_URL(localState, mockUrl);
 
-      expect(localState.externalDashboardUrl).toBe(mockUrl);
+      expect(localState.externalDashboard.url).toBe(mockUrl);
     });
   });
 });
diff --git a/spec/frontend_integration/ide/__snapshots__/ide_integration_spec.js.snap b/spec/frontend_integration/ide/__snapshots__/ide_integration_spec.js.snap
index a76f7960d03..fe714924c2b 100644
--- a/spec/frontend_integration/ide/__snapshots__/ide_integration_spec.js.snap
+++ b/spec/frontend_integration/ide/__snapshots__/ide_integration_spec.js.snap
@@ -15,7 +15,7 @@ exports[`WebIDE runs 1`] = `
         (jest: contents hidden)
       </div>
       <div
-        class="multi-file-commit-panel flex-column"
+        class="gl-relative multi-file-commit-panel flex-column"
         style="width: 340px;"
       >
         <div
diff --git a/spec/graphql/types/query_type_spec.rb b/spec/graphql/types/query_type_spec.rb
index a23103b4e58..1bb04f1bb68 100644
--- a/spec/graphql/types/query_type_spec.rb
+++ b/spec/graphql/types/query_type_spec.rb
@@ -9,23 +9,18 @@ describe GitlabSchema.types['Query'] do
 
   it 'has the expected fields' do
     expected_fields = %i[
-      current_user
-      design_management
-      geoNode
+      project
+      namespace
       group
       echo
-      instanceSecurityDashboard
       metadata
-      namespace
-      project
-      projects
+      current_user
       snippets
+      design_management
       user
-      vulnerabilities
-      vulnerabilitiesCountByDayAndSeverity
     ]
 
-    expect(described_class).to have_graphql_fields(*expected_fields)
+    expect(described_class).to have_graphql_fields(*expected_fields).at_least
   end
 
   describe 'namespace field' do
diff --git a/spec/models/todo_spec.rb b/spec/models/todo_spec.rb
index 08f0627191a..4ec93f5a408 100644
--- a/spec/models/todo_spec.rb
+++ b/spec/models/todo_spec.rb
@@ -393,10 +393,10 @@ describe Todo do
     end
   end
 
-  describe '.update_state' do
+  describe '.batch_update' do
     it 'updates the state of todos' do
       todo = create(:todo, :pending)
-      ids = described_class.update_state(:done)
+      ids = described_class.batch_update(state: :done)
 
       todo.reload
 
@@ -407,7 +407,7 @@ describe Todo do
     it 'does not update todos that already have the given state' do
       create(:todo, :pending)
 
-      expect(described_class.update_state(:pending)).to be_empty
+      expect(described_class.batch_update(state: :pending)).to be_empty
     end
 
     it 'updates updated_at' do
@@ -416,7 +416,7 @@ describe Todo do
       Timecop.freeze(1.day.from_now) do
         expected_update_date = Time.current.utc
 
-        ids = described_class.update_state(:done)
+        ids = described_class.batch_update(state: :done)
 
         expect(Todo.where(id: ids).map(&:updated_at)).to all(be_like_time(expected_update_date))
       end
diff --git a/spec/services/todo_service_spec.rb b/spec/services/todo_service_spec.rb
index 4894cf12372..56725dd0bd8 100644
--- a/spec/services/todo_service_spec.rb
+++ b/spec/services/todo_service_spec.rb
@@ -274,12 +274,12 @@ describe TodoService do
       end
     end
 
-    describe '#mark_pending_todos_as_done' do
+    describe '#resolve_todos_for_target' do
       it 'marks related pending todos to the target for the user as done' do
         first_todo = create(:todo, :assigned, user: john_doe, project: project, target: issue, author: author)
         second_todo = create(:todo, :assigned, user: john_doe, project: project, target: issue, author: author)
 
-        service.mark_pending_todos_as_done(issue, john_doe)
+        service.resolve_todos_for_target(issue, john_doe)
 
         expect(first_todo.reload).to be_done
         expect(second_todo.reload).to be_done
@@ -293,7 +293,7 @@ describe TodoService do
           expect(john_doe.todos_pending_count).to eq(1)
           expect(john_doe).to receive(:update_todos_count_cache).and_call_original
 
-          service.mark_pending_todos_as_done(issue, john_doe)
+          service.resolve_todos_for_target(issue, john_doe)
 
           expect(john_doe.todos_done_count).to eq(1)
           expect(john_doe.todos_pending_count).to eq(0)
@@ -301,59 +301,6 @@ describe TodoService do
       end
     end
 
-    shared_examples 'updating todos state' do |meth, state, new_state|
-      let!(:first_todo) { create(:todo, state, user: john_doe, project: project, target: issue, author: author) }
-      let!(:second_todo) { create(:todo, state, user: john_doe, project: project, target: issue, author: author) }
-
-      it 'updates related todos for the user with the new_state' do
-        service.send(meth, collection, john_doe)
-
-        expect(first_todo.reload.state?(new_state)).to be true
-        expect(second_todo.reload.state?(new_state)).to be true
-      end
-
-      it 'returns the updated ids' do
-        expect(service.send(meth, collection, john_doe)).to match_array([first_todo.id, second_todo.id])
-      end
-
-      describe 'cached counts' do
-        it 'updates when todos change' do
-          expect(john_doe.todos.where(state: new_state).count).to eq(0)
-          expect(john_doe.todos.where(state: state).count).to eq(2)
-          expect(john_doe).to receive(:update_todos_count_cache).and_call_original
-
-          service.send(meth, collection, john_doe)
-
-          expect(john_doe.todos.where(state: new_state).count).to eq(2)
-          expect(john_doe.todos.where(state: state).count).to eq(0)
-        end
-      end
-    end
-
-    describe '#mark_todos_as_done' do
-      it_behaves_like 'updating todos state', :mark_todos_as_done, :pending, :done do
-        let(:collection) { Todo.all }
-      end
-    end
-
-    describe '#mark_todos_as_done_by_ids' do
-      it_behaves_like 'updating todos state', :mark_todos_as_done_by_ids, :pending, :done do
-        let(:collection) { [first_todo, second_todo].map(&:id) }
-      end
-    end
-
-    describe '#mark_todos_as_pending' do
-      it_behaves_like 'updating todos state', :mark_todos_as_pending, :done, :pending do
-        let(:collection) { Todo.all }
-      end
-    end
-
-    describe '#mark_todos_as_pending_by_ids' do
-      it_behaves_like 'updating todos state', :mark_todos_as_pending_by_ids, :done, :pending do
-        let(:collection) { [first_todo, second_todo].map(&:id) }
-      end
-    end
-
     describe '#new_note' do
       let!(:first_todo) { create(:todo, :assigned, user: john_doe, project: project, target: issue, author: author) }
       let!(:second_todo) { create(:todo, :assigned, user: john_doe, project: project, target: issue, author: author) }
@@ -1000,121 +947,111 @@ describe TodoService do
     expect(john_doe.todos_pending_count).to eq(1)
   end
 
-  describe '#mark_todos_as_done' do
-    let(:issue) { create(:issue, project: project, author: author, assignees: [john_doe]) }
-    let(:another_issue) { create(:issue, project: project, author: author, assignees: [john_doe]) }
+  shared_examples 'updating todos state' do |state, new_state, new_resolved_by = nil|
+    let!(:first_todo) { create(:todo, state, user: john_doe) }
+    let!(:second_todo) { create(:todo, state, user: john_doe) }
+    let(:collection) { Todo.all }
 
-    it 'marks a relation of todos as done' do
-      create(:todo, :mentioned, user: john_doe, target: issue, project: project)
+    it 'updates related todos for the user with the new_state' do
+      method_call
 
-      todos = TodosFinder.new(john_doe, {}).execute
-      expect { described_class.new.mark_todos_as_done(todos, john_doe) }
-       .to change { john_doe.todos.done.count }.from(0).to(1)
+      expect(collection.all? { |todo| todo.reload.state?(new_state)}).to be_truthy
     end
 
-    it 'marks an array of todos as done' do
-      todo = create(:todo, :mentioned, user: john_doe, target: issue, project: project)
+    if new_resolved_by
+      it 'updates resolution mechanism' do
+        method_call
 
-      todos = TodosFinder.new(john_doe, {}).execute
-      expect { described_class.new.mark_todos_as_done(todos, john_doe) }
-        .to change { todo.reload.state }.from('pending').to('done')
-    end
-
-    it 'returns the ids of updated todos' do # Needed on API
-      todo = create(:todo, :mentioned, user: john_doe, target: issue, project: project)
-
-      todos = TodosFinder.new(john_doe, {}).execute
-      expect(described_class.new.mark_todos_as_done(todos, john_doe)).to eq([todo.id])
-    end
-
-    context 'when some of the todos are done already' do
-      let!(:first_todo) { create(:todo, :mentioned, user: john_doe, target: issue, project: project) }
-      let!(:second_todo) { create(:todo, :mentioned, user: john_doe, target: another_issue, project: project) }
-
-      it 'returns the ids of those still pending' do
-        described_class.new.mark_pending_todos_as_done(issue, john_doe)
-
-        expect(described_class.new.mark_todos_as_done(Todo.all, john_doe)).to eq([second_todo.id])
+        expect(collection.all? { |todo| todo.reload.resolved_by_action == new_resolved_by }).to be_truthy
       end
+    end
 
-      it 'returns an empty array if all are done' do
-        described_class.new.mark_pending_todos_as_done(issue, john_doe)
-        described_class.new.mark_pending_todos_as_done(another_issue, john_doe)
+    it 'returns the updated ids' do
+      expect(method_call).to match_array([first_todo.id, second_todo.id])
+    end
 
-        expect(described_class.new.mark_todos_as_done(Todo.all, john_doe)).to eq([])
+    describe 'cached counts' do
+      it 'updates when todos change' do
+        expect(john_doe.todos.where(state: new_state).count).to eq(0)
+        expect(john_doe.todos.where(state: state).count).to eq(2)
+        expect(john_doe).to receive(:update_todos_count_cache).and_call_original
+
+        method_call
+
+        expect(john_doe.todos.where(state: new_state).count).to eq(2)
+        expect(john_doe.todos.where(state: state).count).to eq(0)
       end
     end
   end
 
-  describe '#mark_todo_as_done' do
-    it 'marks a todo done' do
-      todo1 = create(:todo, :pending, user: john_doe)
-
-      described_class.new.mark_todo_as_done(todo1, john_doe)
-
-      expect(todo1.reload.state).to eq('done')
-    end
-
-    context 'when todo is already in state done' do
-      let(:todo1) { create(:todo, :done, user: john_doe) }
-
-      it 'does not update the todo' do
-        expect { described_class.new.mark_todo_as_done(todo1, john_doe) }.not_to change(todo1.reload, :state)
-      end
-
-      it 'does not update cache count' do
-        expect(john_doe).not_to receive(:update_todos_count_cache)
-
-        described_class.new.mark_todo_as_done(todo1, john_doe)
+  describe '#resolve_todos' do
+    it_behaves_like 'updating todos state', :pending, :done, 'mark_done' do
+      subject(:method_call) do
+        service.resolve_todos(collection, john_doe, resolution: :done, resolved_by_action: :mark_done)
       end
     end
   end
 
-  describe '#mark_all_todos_as_done_by_user' do
-    it 'marks all todos done' do
-      todo1 = create(:todo, user: john_doe, state: :pending)
-      todo2 = create(:todo, user: john_doe, state: :done)
-      todo3 = create(:todo, user: john_doe, state: :pending)
-
-      ids = described_class.new.mark_all_todos_as_done_by_user(john_doe)
-
-      expect(ids).to contain_exactly(todo1.id, todo3.id)
-      expect(todo1.reload.state).to eq('done')
-      expect(todo2.reload.state).to eq('done')
-      expect(todo3.reload.state).to eq('done')
+  describe '#restore_todos' do
+    it_behaves_like 'updating todos state', :done, :pending do
+      subject(:method_call) do
+        service.restore_todos(collection, john_doe)
+      end
     end
   end
 
-  describe '#mark_todos_as_done_by_ids' do
-    let(:issue) { create(:issue, project: project, author: author, assignees: [john_doe]) }
-    let(:another_issue) { create(:issue, project: project, author: author, assignees: [john_doe]) }
+  describe '#resolve_todo' do
+    let!(:todo) { create(:todo, :assigned, user: john_doe) }
 
-    it 'marks an array of todo ids as done' do
-      todo = create(:todo, :mentioned, user: john_doe, target: issue, project: project)
-      another_todo = create(:todo, :mentioned, user: john_doe, target: another_issue, project: project)
-
-      expect { described_class.new.mark_todos_as_done_by_ids([todo.id, another_todo.id], john_doe) }
-        .to change { john_doe.todos.done.count }.from(0).to(2)
+    it 'marks pending todo as done' do
+      expect do
+        service.resolve_todo(todo, john_doe)
+        todo.reload
+      end.to change { todo.done? }.to(true)
     end
 
-    it 'marks a single todo id as done' do
-      todo = create(:todo, :mentioned, user: john_doe, target: issue, project: project)
-
-      expect { described_class.new.mark_todos_as_done_by_ids(todo.id, john_doe) }
-        .to change { todo.reload.state }.from('pending').to('done')
+    it 'saves resolution mechanism' do
+      expect do
+        service.resolve_todo(todo, john_doe, resolved_by_action: :mark_done)
+        todo.reload
+      end.to change { todo.resolved_by_mark_done? }.to(true)
     end
 
-    it 'caches the number of todos of a user', :use_clean_rails_memory_store_caching do
-      create(:todo, :mentioned, user: john_doe, target: issue, project: project)
-      todo = create(:todo, :mentioned, user: john_doe, target: issue, project: project)
+    context 'cached counts' do
+      it 'updates when todos change' do
+        expect(john_doe.todos_done_count).to eq(0)
+        expect(john_doe.todos_pending_count).to eq(1)
+        expect(john_doe).to receive(:update_todos_count_cache).and_call_original
 
-      described_class.new.mark_todos_as_done_by_ids(todo, john_doe)
+        service.resolve_todo(todo, john_doe)
 
-      # Make sure no TodosFinder is inialized to perform counting
-      expect(TodosFinder).not_to receive(:new)
+        expect(john_doe.todos_done_count).to eq(1)
+        expect(john_doe.todos_pending_count).to eq(0)
+      end
+    end
+  end
 
-      expect(john_doe.todos_done_count).to eq(1)
-      expect(john_doe.todos_pending_count).to eq(1)
+  describe '#restore_todo' do
+    let!(:todo) { create(:todo, :done, user: john_doe) }
+
+    it 'marks resolved todo as pending' do
+      expect do
+        service.restore_todo(todo, john_doe)
+        todo.reload
+      end.to change { todo.pending? }.to(true)
+    end
+
+    context 'cached counts' do
+      it 'updates when todos change' do
+        expect(john_doe.todos_done_count).to eq(1)
+        expect(john_doe.todos_pending_count).to eq(0)
+        expect(john_doe).to receive(:update_todos_count_cache).and_call_original
+
+        service.restore_todo(todo, john_doe)
+
+        expect(john_doe.todos_done_count).to eq(0)
+        expect(john_doe.todos_pending_count).to eq(1)
+      end
     end
   end