Remove license checks in bulk update HAML

- This can cause CE to blow up
- We solve this by moving the license check to
  partials and use render_if_exists

app/views/shared/issuable/_bulk_update_sidebar.html.haml

 - type = local_assigns.fetch(:type)
-- bulk_issue_health_status_flag = type == :issues && @project&.group&.feature_available?(:issuable_health_status)
-- epic_bulk_edit_flag = @project&.group&.feature_available?(:epics) && type == :issues
-- bulk_iterations_flag = @project&.group&.feature_available?(:iterations) && type == :issues
+- is_issue = type == :issues
 
 %aside.issues-bulk-update.js-right-sidebar.right-sidebar{ "aria-live" => "polite", data: { 'signed-in': current_user.present? }, 'aria-label': _('Bulk update') }
   .issuable-sidebar.hidden
@@ -30,32 +28,22 @@
           - field_name = "update[assignee_ids][]"
           = dropdown_tag(_("Select assignee"), options: { toggle_class: "js-user-search js-update-assignee js-filter-submit js-filter-bulk-update", title: _("Assign to"), filter: true, dropdown_class: "dropdown-menu-user dropdown-menu-selectable",
             placeholder: _("Search authors"), data: { first_user: (current_user.username if current_user), null_user: true, current_user: true, project_id: @project.id, field_name: field_name } })
-      - if epic_bulk_edit_flag
-        .block
-          .title
-            = _('Epic')
-          .filter-item.epic-bulk-edit
-            #js-epic-select-root{ data: { group_id: @project&.group&.id, show_header: "true" } }
-          %input{ id: 'issue_epic_id', type: 'hidden', name: 'update[epic_id]' }
+      - if is_issue
+        = render_if_exists 'shared/issuable/epic_dropdown', parent: @project.group
       .block
         .title
           = _('Milestone')
         .filter-item
           = dropdown_tag(_("Select milestone"), options: { title: _("Assign milestone"), toggle_class: "js-milestone-select js-extra-options js-filter-submit js-filter-bulk-update", filter: true, dropdown_class: "dropdown-menu-selectable dropdown-menu-milestone", placeholder: _("Search milestones"), data: { show_no: true, field_name: "update[milestone_id]", project_id: @project.id, use_id: true, default_label: _("Milestone") } })
-      - if bulk_iterations_flag
-        = render_if_exists 'shared/iterations_dropdown', path: @project.group.full_path
+      - if is_issue
+        = render_if_exists 'shared/issuable/iterations_dropdown', parent: @project.group
       .block
         .title
           = _('Labels')
         .filter-item.labels-filter
           = render "shared/issuable/label_dropdown", classes: ["js-filter-bulk-update", "js-multiselect"], dropdown_title: _("Apply a label"), show_create: false, show_footer: false, extra_options: false, filter_submit: false, data_options: { persist_when_hide: "true", field_name: "update[label_ids][]", show_no: false, show_any: false, use_id: true, default_label: _("Labels") }, label_name: _("Select labels"), no_default_styles: true
-      - if bulk_issue_health_status_flag
-        .block
-          .title
-            = _('Health status')
-          .filter-item.health-status.health-status-filter
-            #js-bulk-update-health-status-root
-          %input{ id: 'issue_health_status_value', type: 'hidden', name: 'update[health_status]' }
+      - if is_issue
+        = render_if_exists 'shared/issuable/health_status_dropdown', parent: @project
       .block
         .title
           = _('Subscriptions')

ee/app/views/shared/issuable/_epic_dropdown.html.haml

+- parent = local_assigns.fetch(:parent)
+
+- return unless parent&.feature_available?(:epics)
+
+.block
+  .title
+    = _('Epic')
+  .filter-item.epic-bulk-edit
+    #js-epic-select-root{ data: { group_id: parent.id, show_header: "true" } }
+  %input{ id: 'issue_epic_id', type: 'hidden', name: 'update[epic_id]' }

ee/app/views/shared/issuable/_group_bulk_update_sidebar.html.haml

 - group = local_assigns.fetch(:group)
 - type = local_assigns.fetch(:type)
-- bulk_issue_health_status_flag = type == :issues && group&.feature_available?(:issuable_health_status)
-- epic_bulk_edit_flag = type == :issues && group&.feature_available?(:epics)
-- bulk_edit_iterations = group.feature_available?(:iterations) && type == :issues
+- is_issue = type == :issues
 
 %aside.issues-bulk-update.js-right-sidebar.right-sidebar{ 'aria-live' => 'polite', data: { 'signed-in': current_user.present? }, 'aria-label': _('Bulk update') }
   .issuable-sidebar.hidden
@@ -11,33 +9,23 @@
         .filter-item.inline.update-issues-btn.float-left
           = button_tag _('Update all'), class: "gl-button btn update-selected-issues btn-info", disabled: true
         = button_tag _('Cancel'), class: "gl-button btn btn-default js-bulk-update-menu-hide float-right"
-      - if epic_bulk_edit_flag
-        .block
-          .title
-            = _('Epic')
-          .filter-item.epic-bulk-edit
-            #js-epic-select-root{ data: { group_id: group.id, show_header: "true" } }
-          %input{ id: 'issue_epic_id', type: 'hidden', name: 'update[epic_id]' }
+      - if is_issue
+        = render "shared/issuable/epic_dropdown", parent: group
       - unless type == :epics
         .block
           .title
             = _('Milestone')
           .filter-item
             = dropdown_tag(_('Select milestone'), options: { title: _('Assign milestone'), toggle_class: 'js-milestone-select js-extra-options js-filter-submit js-filter-bulk-update', filter: true, dropdown_class: 'dropdown-menu-selectable dropdown-menu-milestone', placeholder: _('Search milestones'), data: { show_no: true, field_name: 'update[milestone_id]', group_id: group&.id, use_id: true, default_label: _('Milestone') } })
-      - if bulk_edit_iterations
-        = render "shared/iterations_dropdown", path: group.full_path
+      - if is_issue
+        = render "shared/issuable/iterations_dropdown", parent: group
       .block
         .title
           = _('Labels')
         .filter-item.labels-filter
           = render "shared/issuable/label_dropdown", classes: ["js-filter-bulk-update", "js-multiselect"], dropdown_title: _('Apply a label'), show_create: false, show_footer: false, extra_options: false, filter_submit: false, data_options: { persist_when_hide: "true", field_name: "update[label_ids][]", show_no: false, show_any: false, use_id: true, default_label: "Labels" }, label_name: _('Select labels'), no_default_styles: true, edit_context: group
-      - if bulk_issue_health_status_flag
-        .block
-          .title
-            = _('Health status')
-          .filter-item.health-status.health-status-filter
-            #js-bulk-update-health-status-root
-          %input{ id: 'issue_health_status_value', type: 'hidden', name: 'update[health_status]' }
+      - if is_issue
+        = render "shared/issuable/health_status_dropdown", parent: group
 
       = hidden_field_tag 'update[issuable_ids]', []
       = hidden_field_tag :state_event, params[:state_event]

ee/app/views/shared/issuable/_health_status_dropdown.html.haml

+- parent = local_assigns.fetch(:parent)
+- return unless parent&.feature_available?(:issuable_health_status)
+
+.block
+  .title
+    = _('Health status')
+  .filter-item.health-status.health-status-filter
+    #js-bulk-update-health-status-root
+  %input{ id: 'issue_health_status_value', type: 'hidden', name: 'update[health_status]' }

ee/app/views/shared/_iterations_dropdown.html.haml → ee/app/views/shared/issuable/_iterations_dropdown.html.haml

-- path = local_assigns.fetch(:path)
+- parent = local_assigns.fetch(:parent)
+- return unless parent&.feature_available?(:iterations)
 
 .block
   .title
     = _('Iteration')
   .filter-item
-    #js-iteration-dropdown{ data: { full_path: path } }
+    #js-iteration-dropdown{ data: { full_path: parent.full_path } }
   %input{ id: 'issue_iteration_id', type: 'hidden', name: 'update[iteration_id]' }

ee/spec/support/shared_examples/views/issuable_bulk_dropdown_shared_examples.rb

+# frozen_string_literal: true
+
+RSpec.shared_examples_for 'issuable bulk dropdown' do |path|
+  let(:parent) { create(:group) }
+  let(:feature_enabled) { true }
+
+  # We use `view.render`, because just `render` throws a "no implicit conversion of nil into String" exception
+  # https://gitlab.com/gitlab-org/gitlab/-/merge_requests/53093#note_499060593
+  subject { view.render(path, { parent: parent }) }
+
+  before do
+    stub_licensed_features(feature_id => feature_enabled)
+  end
+
+  it 'renders hidden input' do
+    expect(subject).to have_css(input_selector, visible: false)
+  end
+
+  it 'renders vue root' do
+    expect(subject).to have_css(root_selector)
+  end
+
+  context 'without parent' do
+    let(:parent) { nil }
+
+    it 'is nil' do
+      expect(subject).to be_nil
+    end
+  end
+
+  context 'without feature' do
+    let(:feature_enabled) { false }
+
+    it 'is nil' do
+      expect(subject).to be_nil
+    end
+  end
+end

ee/spec/views/shared/issuable/_epic_dropdown.html.haml_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'shared/issuable/_epic_dropdown.html.haml' do
+  it_behaves_like 'issuable bulk dropdown', 'shared/issuable/epic_dropdown' do
+    let(:feature_id) { :epics }
+    let(:input_selector) { 'input#issue_epic_id[name="update[epic_id]"]' }
+    let(:root_selector) { "#js-epic-select-root[data-group-id=\"#{parent.id}\"][data-show-header=\"true\"]" }
+  end
+end

ee/spec/views/shared/issuable/_health_status_dropdown.html.haml_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'shared/issuable/_health_status_dropdown.html.haml' do
+  it_behaves_like 'issuable bulk dropdown', 'shared/issuable/health_status_dropdown' do
+    let(:feature_id) { :issuable_health_status }
+    let(:input_selector) { 'input#issue_health_status_value[name="update[health_status]"]' }
+    let(:root_selector) { "#js-bulk-update-health-status-root" }
+  end
+end

ee/spec/views/shared/issuable/_iterations_dropdown.html.haml_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'shared/issuable/_iterations_dropdown.html.haml' do
+  it_behaves_like 'issuable bulk dropdown', 'shared/issuable/iterations_dropdown' do
+    let(:feature_id) { :iterations }
+    let(:input_selector) { 'input#issue_iteration_id[name="update[iteration_id]"]' }
+    let(:root_selector) { "#js-iteration-dropdown[data-full-path=\"#{parent.full_path}\"]" }
+  end
+end