1 files changed, 68 insertions, 0 deletions
diff --git a/spec/graphql/subscriptions/issuable_updated_spec.rb b/spec/graphql/subscriptions/issuable_updated_spec.rb
new file mode 100644
index 00000000000..cc88b37627d
--- /dev/null
+++ b/spec/graphql/subscriptions/issuable_updated_spec.rb
@@ -0,0 +1,68 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Subscriptions::IssuableUpdated do
+  include GraphqlHelpers
+
+  it { expect(described_class).to have_graphql_arguments(:issuable_id) }
+  it { expect(described_class.payload_type).to eq(Types::IssuableType) }
+
+  describe '#resolve' do
+    let_it_be(:unauthorized_user) { create(:user) }
+    let_it_be(:issue) { create(:issue) }
+
+    let(:current_user) { issue.author }
+    let(:issuable_id) { issue.to_gid }
+
+    subject { resolver.resolve_with_support(issuable_id: issuable_id) }
+
+    context 'initial subscription' do
+      let(:resolver) { resolver_instance(described_class, ctx: { current_user: current_user }, subscription_update: false) }
+
+      it 'returns nil' do
+        expect(subject).to eq(nil)
+      end
+
+      context 'when user is unauthorized' do
+        let(:current_user) { unauthorized_user }
+
+        it 'raises an exception' do
+          expect { subject }.to raise_error(GraphQL::ExecutionError)
+        end
+      end
+
+      context 'when issue does not exist' do
+        let(:issuable_id) { GlobalID.parse("gid://gitlab/Issue/#{non_existing_record_id}") }
+
+        it 'raises an exception' do
+          expect { subject }.to raise_error(GraphQL::ExecutionError)
+        end
+      end
+
+      context 'when a GraphQL::ID_TYPE is provided' do
+        let(:issuable_id) { issue.to_gid.to_s }
+
+        it 'raises an exception' do
+          expect { subject }.to raise_error(Gitlab::Graphql::Errors::ArgumentError)
+        end
+      end
+    end
+
+    context 'subscription updates' do
+      let(:resolver) { resolver_instance(described_class, obj: issue, ctx: { current_user: current_user }, subscription_update: true) }
+
+      it 'returns the resolved object' do
+        expect(subject).to eq(issue)
+      end
+
+      context 'when user is unauthorized' do
+        let(:current_user) { unauthorized_user }
+
+        it 'unsubscribes the user' do
+          expect { subject }.to throw_symbol(:graphql_subscription_unsubscribed)
+        end
+      end
+    end
+  end
+end