Make group and project fields fullPath argument case-insensitive

- make full path loader case-insensitive

Changelog: fixed

lib/gitlab/graphql/loaders/full_path_model_loader.rb

@@ -5,19 +5,20 @@ module Gitlab
     module Loaders
       # Suitable for use to find resources that expose `where_full_path_in`,
       # such as Project, Group, Namespace
+      # full path is always converted to lowercase for case-insensitive results
       class FullPathModelLoader
         attr_reader :model_class, :full_path
 
         def initialize(model_class, full_path)
           @model_class = model_class
-          @full_path = full_path
+          @full_path = full_path.downcase
         end
 
         def find
           BatchLoader::GraphQL.for(full_path).batch(key: model_class) do |full_paths, loader, args|
             # `with_route` avoids an N+1 calculating full_path
             args[:key].where_full_path_in(full_paths).with_route.each do |model_instance|
-              loader.call(model_instance.full_path, model_instance)
+              loader.call(model_instance.full_path.downcase, model_instance)
             end
           end
         end

spec/graphql/resolvers/group_resolver_spec.rb

@@ -20,10 +20,15 @@ RSpec.describe Resolvers::GroupResolver do
     end
 
     it 'resolves an unknown full_path to nil' do
-      result = batch_sync { resolve_group('unknown/project') }
+      result = batch_sync { resolve_group('unknown/group') }
 
       expect(result).to be_nil
     end
+
+    it 'treats group full path as case insensitive' do
+      result = batch_sync { resolve_group(group1.full_path.upcase) }
+      expect(result).to eq group1
+    end
   end
 
   def resolve_group(full_path)

spec/graphql/resolvers/project_resolver_spec.rb

@@ -25,6 +25,11 @@ RSpec.describe Resolvers::ProjectResolver do
 
       expect(result).to be_nil
     end
+
+    it 'treats project full path as case insensitive' do
+      result = batch_sync { resolve_project(project1.full_path.upcase) }
+      expect(result).to eq project1
+    end
   end
 
   it 'does not increase complexity depending on number of load limits' do