1 files changed, 69 insertions, 0 deletions
diff --git a/spec/support/shared_examples/requests/api/graphql/mutations/subscription_shared_examples.rb b/spec/support/shared_examples/requests/api/graphql/mutations/subscription_shared_examples.rb
new file mode 100644
index 00000000000..40b88ef370f
--- /dev/null
+++ b/spec/support/shared_examples/requests/api/graphql/mutations/subscription_shared_examples.rb
@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.shared_examples 'a subscribable resource api' do
+  include GraphqlHelpers
+
+  let_it_be(:current_user) { create(:user) }
+  let(:project) { resource.project }
+  let(:input) { { subscribed_state: true } }
+  let(:resource_ref) { resource.class.name.camelize(:lower) }
+
+  let(:mutation) do
+    variables = {
+      project_path: project.full_path,
+      iid: resource.iid.to_s
+    }
+
+    graphql_mutation(
+      mutation_name,
+      variables.merge(input),
+      <<-QL.strip_heredoc
+        clientMutationId
+        errors
+        #{resource_ref} {
+          id
+          subscribed
+        }
+      QL
+    )
+  end
+
+  def mutation_response
+    graphql_mutation_response(mutation_name)[resource_ref]['subscribed']
+  end
+
+  context 'when the user is not authorized' do
+    it_behaves_like 'a mutation that returns top-level errors',
+                    errors: ["The resource that you are attempting to access "\
+                             "does not exist or you don't have permission to "\
+                             "perform this action"]
+  end
+
+  context 'when user is authorized' do
+    before do
+      project.add_developer(current_user)
+    end
+
+    it 'marks the resource as subscribed' do
+      post_graphql_mutation(mutation, current_user: current_user)
+
+      expect(response).to have_gitlab_http_status(:success)
+      expect(mutation_response).to eq(true)
+    end
+
+    context 'when passing subscribe false as input' do
+      let(:input) { { subscribed_state: false } }
+
+      it 'unmarks the resource as subscribed' do
+        resource.subscribe(current_user, project)
+
+        post_graphql_mutation(mutation, current_user: current_user)
+
+        expect(response).to have_gitlab_http_status(:success)
+        expect(mutation_response).to eq(false)
+      end
+    end
+  end
+end