1 files changed, 43 insertions, 0 deletions
diff --git a/spec/graphql/resolvers/concerns/resolves_ids_spec.rb b/spec/graphql/resolvers/concerns/resolves_ids_spec.rb
new file mode 100644
index 00000000000..1dd27c0eff0
--- /dev/null
+++ b/spec/graphql/resolvers/concerns/resolves_ids_spec.rb
@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe ResolvesIds do
+  # gid://gitlab/Project/6
+  # gid://gitlab/Issue/6
+  # gid://gitlab/Project/6 gid://gitlab/Issue/6
+  context 'with a single project' do
+    let(:ids) { 'gid://gitlab/Project/6' }
+    let(:type) { ::Types::GlobalIDType[::Project] }
+
+    it 'returns the correct array' do
+      expect(resolve_ids).to match_array(['6'])
+    end
+  end
+
+  context 'with a single issue' do
+    let(:ids) { 'gid://gitlab/Issue/9' }
+    let(:type) { ::Types::GlobalIDType[::Issue] }
+
+    it 'returns the correct array' do
+      expect(resolve_ids).to match_array(['9'])
+    end
+  end
+
+  context 'with multiple users' do
+    let(:ids) { ['gid://gitlab/User/7', 'gid://gitlab/User/13', 'gid://gitlab/User/21'] }
+    let(:type) { ::Types::GlobalIDType[::User] }
+
+    it 'returns the correct array' do
+      expect(resolve_ids).to match_array(%w[7 13 21])
+    end
+  end
+
+  def mock_resolver
+    Class.new(GraphQL::Schema::Resolver) { extend ResolvesIds }
+  end
+
+  def resolve_ids
+    mock_resolver.resolve_ids(ids, type)
+  end
+end