1 files changed, 66 insertions, 0 deletions
diff --git a/spec/graphql/mutations/environments/canary_ingress/update_spec.rb b/spec/graphql/mutations/environments/canary_ingress/update_spec.rb
new file mode 100644
index 00000000000..c022828cf09
--- /dev/null
+++ b/spec/graphql/mutations/environments/canary_ingress/update_spec.rb
@@ -0,0 +1,66 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Mutations::Environments::CanaryIngress::Update do
+  let_it_be(:project) { create(:project) }
+  let_it_be(:environment) { create(:environment, project: project) }
+  let_it_be(:maintainer) { create(:user) }
+  let_it_be(:reporter) { create(:user) }
+  let(:user) { maintainer }
+
+  subject(:mutation) { described_class.new(object: nil, context: { current_user: user }, field: nil) }
+
+  before_all do
+    project.add_maintainer(maintainer)
+    project.add_reporter(reporter)
+  end
+
+  describe '#resolve' do
+    subject { mutation.resolve(id: environment_id, weight: weight) }
+
+    let(:environment_id) { environment.to_global_id.to_s }
+    let(:weight) { 50 }
+    let(:update_service) { double('update_service') }
+
+    before do
+      allow(Environments::CanaryIngress::UpdateService).to receive(:new) { update_service }
+    end
+
+    context 'when service execution succeeded' do
+      before do
+        allow(update_service).to receive(:execute_async) { { status: :success } }
+      end
+
+      it 'returns no errors' do
+        expect(subject[:errors]).to be_empty
+      end
+    end
+
+    context 'when service encounters a problem' do
+      before do
+        allow(update_service).to receive(:execute_async) { { status: :error, message: 'something went wrong' } }
+      end
+
+      it 'returns an error' do
+        expect(subject[:errors]).to eq(['something went wrong'])
+      end
+    end
+
+    context 'when environment is not found' do
+      let(:environment_id) { non_existing_record_id.to_s }
+
+      it 'raises an error' do
+        expect { subject }.to raise_error(GraphQL::CoercionError)
+      end
+    end
+
+    context 'when user is reporter who does not have permission to access the environment' do
+      let(:user) { reporter }
+
+      it 'raises an error' do
+        expect { subject }.to raise_error("The resource that you are attempting to access does not exist or you don't have permission to perform this action")
+      end
+    end
+  end
+end