1 files changed, 56 insertions, 0 deletions
diff --git a/spec/graphql/mutations/environments/update_spec.rb b/spec/graphql/mutations/environments/update_spec.rb
new file mode 100644
index 00000000000..87c1bd5a44b
--- /dev/null
+++ b/spec/graphql/mutations/environments/update_spec.rb
@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Mutations::Environments::Update, feature_category: :environment_management 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, external_url: external_url) }
+
+    let(:environment_id) { environment.to_global_id }
+    let(:external_url) { 'https://gitlab.com/' }
+
+    context 'when service execution succeeded' do
+      it 'returns no errors' do
+        expect(subject[:errors]).to be_empty
+      end
+
+      it 'updates the environment' do
+        expect(subject[:environment][:external_url]).to eq(external_url)
+      end
+    end
+
+    context 'when service cannot update the attribute' do
+      let(:external_url) { 'http://${URL}' }
+
+      it 'returns an error' do
+        expect(subject)
+          .to eq({
+            environment: environment,
+            errors: ['External url URI is invalid']
+          })
+      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(Gitlab::Graphql::Authorize::AuthorizeResource::RESOURCE_ACCESS_ERROR)
+      end
+    end
+  end
+end