replace `is_member_of` with `member_of?`

.rubocop_todo.yml

@@ -244,11 +244,11 @@ Style/PerlBackrefs:
 # NameWhitelist: is_a?
 Style/PredicateName:
   Enabled: true
-  Exclude:
-    - 'features/*'
+  # Exclude:
+    # - 'features/*'
   # NamePrefix: is_
   NamePrefixBlacklist: is_
-  NameWhitelist: has_n_stars
+  NameWhitelist: have_visible_content
 
 # Offense count: 58
 # Cop supports --auto-correct.

features/steps/shared/group.rb

@@ -2,27 +2,27 @@ module SharedGroup
   include Spinach::DSL
 
   step 'current user is developer of group "Owned"' do
-    is_member_of(current_user.name, "Owned", Gitlab::Access::DEVELOPER)
+    member_of?(current_user.name, "Owned", Gitlab::Access::DEVELOPER)
   end
 
   step '"John Doe" is owner of group "Owned"' do
-    is_member_of("John Doe", "Owned", Gitlab::Access::OWNER)
+    member_of?("John Doe", "Owned", Gitlab::Access::OWNER)
   end
 
   step '"John Doe" is guest of group "Guest"' do
-    is_member_of("John Doe", "Guest", Gitlab::Access::GUEST)
+    member_of?("John Doe", "Guest", Gitlab::Access::GUEST)
   end
 
   step '"Mary Jane" is owner of group "Owned"' do
-    is_member_of("Mary Jane", "Owned", Gitlab::Access::OWNER)
+    member_of?("Mary Jane", "Owned", Gitlab::Access::OWNER)
   end
 
   step '"Mary Jane" is guest of group "Owned"' do
-    is_member_of("Mary Jane", "Owned", Gitlab::Access::GUEST)
+    member_of?("Mary Jane", "Owned", Gitlab::Access::GUEST)
   end
 
   step '"Mary Jane" is guest of group "Guest"' do
-    is_member_of("Mary Jane", "Guest", Gitlab::Access::GUEST)
+    member_of?("Mary Jane", "Guest", Gitlab::Access::GUEST)
   end
 
   step 'I should see group "TestGroup"' do
@@ -35,7 +35,7 @@ module SharedGroup
 
   protected
 
-  def is_member_of(username, groupname, role)
+  def member_of?(username, groupname, role)
     @project_count ||= 0
     user = User.find_by(name: username) || create(:user, name: username)
     group = Group.find_by(name: groupname) || create(:group, name: groupname)