1 files changed, 35 insertions, 0 deletions
diff --git a/spec/initializers/global_id_spec.rb b/spec/initializers/global_id_spec.rb
new file mode 100644
index 00000000000..63bfa32d74f
--- /dev/null
+++ b/spec/initializers/global_id_spec.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'global_id' do
+  it 'prepends `Gitlab::Patch::GlobalID`' do
+    expect(GlobalID.ancestors).to include(Gitlab::Patch::GlobalID)
+  end
+
+  it 'patches GlobalID to find aliased models when a deprecation exists' do
+    allow(Gitlab::GlobalId::Deprecations).to receive(:deprecation_for).and_call_original
+    allow(Gitlab::GlobalId::Deprecations).to receive(:deprecation_for).with('Issue').and_return(double(new_model_name: 'Project'))
+    project = create(:project)
+    gid_string = Gitlab::GlobalId.build(model_name: Issue.name, id: project.id).to_s
+
+    expect(GlobalID.new(gid_string)).to have_attributes(
+      to_s: gid_string,
+      model_name: 'Project',
+      model_class: Project,
+      find: project
+    )
+  end
+
+  it 'works as normal when no deprecation exists' do
+    issue = create(:issue)
+    gid_string = Gitlab::GlobalId.build(model_name: Issue.name, id: issue.id).to_s
+
+    expect(GlobalID.new(gid_string)).to have_attributes(
+      to_s: gid_string,
+      model_name: 'Issue',
+      model_class: Issue,
+      find: issue
+    )
+  end
+end