1 files changed, 69 insertions, 0 deletions
diff --git a/spec/requests/projects/ml/candidates_controller_spec.rb b/spec/requests/projects/ml/candidates_controller_spec.rb
new file mode 100644
index 00000000000..4a0fd1ce4f5
--- /dev/null
+++ b/spec/requests/projects/ml/candidates_controller_spec.rb
@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Projects::Ml::CandidatesController, feature_category: :mlops do
+  let_it_be(:project) { create(:project, :repository) }
+  let_it_be(:user) { project.first_owner }
+  let_it_be(:experiment) { create(:ml_experiments, project: project, user: user) }
+  let_it_be(:candidate) { create(:ml_candidates, experiment: experiment, user: user) }
+
+  let(:ff_value) { true }
+  let(:threshold) { 4 }
+  let(:candidate_iid) { candidate.iid }
+
+  before do
+    stub_feature_flags(ml_experiment_tracking: false)
+    stub_feature_flags(ml_experiment_tracking: project) if ff_value
+
+    sign_in(user)
+  end
+
+  shared_examples '404 if feature flag disabled' do
+    context 'when :ml_experiment_tracking disabled' do
+      let(:ff_value) { false }
+
+      it 'is 404' do
+        expect(response).to have_gitlab_http_status(:not_found)
+      end
+    end
+  end
+
+  describe 'GET show' do
+    let(:params) { basic_params.merge(id: experiment.iid) }
+
+    before do
+      show_candidate
+    end
+
+    it 'renders the template' do
+      expect(response).to render_template('projects/ml/candidates/show')
+    end
+
+    # MR removing this xit https://gitlab.com/gitlab-org/gitlab/-/merge_requests/104166
+    xit 'does not perform N+1 sql queries' do
+      control_count = ActiveRecord::QueryRecorder.new { show_candidate }
+
+      create_list(:ml_candidate_params, 3, candidate: candidate)
+      create_list(:ml_candidate_metrics, 3, candidate: candidate)
+
+      expect { show_candidate }.not_to exceed_all_query_limit(control_count).with_threshold(threshold)
+    end
+
+    context 'when candidate does not exist' do
+      let(:candidate_iid) { non_existing_record_id.to_s }
+
+      it 'returns 404' do
+        expect(response).to have_gitlab_http_status(:not_found)
+      end
+    end
+
+    it_behaves_like '404 if feature flag disabled'
+  end
+
+  private
+
+  def show_candidate
+    get project_ml_candidate_path(project, candidate_iid)
+  end
+end