1 files changed, 108 insertions, 0 deletions
diff --git a/spec/requests/api/graphql/project/cluster_agents_spec.rb b/spec/requests/api/graphql/project/cluster_agents_spec.rb
new file mode 100644
index 00000000000..dc7254dd552
--- /dev/null
+++ b/spec/requests/api/graphql/project/cluster_agents_spec.rb
@@ -0,0 +1,108 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Project.cluster_agents' do
+  include GraphqlHelpers
+
+  let_it_be(:project) { create(:project, :public) }
+  let_it_be(:current_user) { create(:user, maintainer_projects: [project]) }
+  let_it_be(:agents) { create_list(:cluster_agent, 5, project: project) }
+
+  let(:first) { var('Int') }
+  let(:cluster_agents_fields) { nil }
+  let(:project_fields) do
+    query_nodes(:cluster_agents, cluster_agents_fields, args: { first: first }, max_depth: 3)
+  end
+
+  let(:query) do
+    args = { full_path: project.full_path }
+
+    with_signature([first], graphql_query_for(:project, args, project_fields))
+  end
+
+  before do
+    allow(Gitlab::Kas::Client).to receive(:new).and_return(double(get_connected_agents: []))
+  end
+
+  it 'can retrieve cluster agents' do
+    post_graphql(query, current_user: current_user)
+
+    expect(graphql_data_at(:project, :cluster_agents, :nodes)).to match_array(
+      agents.map { |agent| a_hash_including('id' => global_id_of(agent)) }
+    )
+  end
+
+  context 'selecting page info' do
+    let(:project_fields) do
+      query_nodes(:cluster_agents, args: { first: first }, include_pagination_info: true)
+    end
+
+    it 'can paginate cluster agents' do
+      post_graphql(query, current_user: current_user, variables: first.with(2))
+
+      expect(graphql_data_at(:project, :cluster_agents, :page_info)).to include(
+        'hasNextPage' => be_truthy,
+        'hasPreviousPage' => be_falsey
+      )
+      expect(graphql_data_at(:project, :cluster_agents, :nodes)).to have_attributes(size: 2)
+    end
+  end
+
+  context 'selecting tokens' do
+    let_it_be(:token_1) { create(:cluster_agent_token, agent: agents.second) }
+    let_it_be(:token_2) { create(:cluster_agent_token, agent: agents.second, last_used_at: 3.days.ago) }
+    let_it_be(:token_3) { create(:cluster_agent_token, agent: agents.second, last_used_at: 2.days.ago) }
+
+    let(:cluster_agents_fields) { [:id, query_nodes(:tokens, of: 'ClusterAgentToken')] }
+
+    it 'can select tokens in last_used_at order' do
+      post_graphql(query, current_user: current_user)
+
+      tokens = graphql_data_at(:project, :cluster_agents, :nodes, :tokens, :nodes)
+
+      expect(tokens).to match([
+        a_hash_including('id' => global_id_of(token_3)),
+        a_hash_including('id' => global_id_of(token_2)),
+        a_hash_including('id' => global_id_of(token_1))
+      ])
+    end
+
+    it 'does not suffer from N+1 performance issues' do
+      post_graphql(query, current_user: current_user)
+
+      expect do
+        post_graphql(query, current_user: current_user)
+      end.to issue_same_number_of_queries_as { post_graphql(query, current_user: current_user, variables: [first.with(1)]) }
+    end
+  end
+
+  context 'selecting connections' do
+    let(:agent_meta) { double(version: '1', commit_id: 'abc', pod_namespace: 'namespace', pod_name: 'pod') }
+    let(:connected_agent) { double(agent_id: agents.first.id, connected_at: 123456, connection_id: 1, agent_meta: agent_meta) }
+
+    let(:metadata_fields) { query_graphql_field(:metadata, {}, [:version, :commit, :pod_namespace, :pod_name], 'AgentMetadata') }
+    let(:cluster_agents_fields) { [:id, query_nodes(:connections, [:connection_id, :connected_at, metadata_fields])] }
+
+    before do
+      allow(Gitlab::Kas::Client).to receive(:new).and_return(double(get_connected_agents: [connected_agent]))
+    end
+
+    it 'can retrieve connections and agent metadata' do
+      post_graphql(query, current_user: current_user)
+
+      connection = graphql_data_at(:project, :cluster_agents, :nodes, :connections, :nodes).first
+
+      expect(connection).to include({
+        'connectionId' => connected_agent.connection_id.to_s,
+        'connectedAt' => Time.at(connected_agent.connected_at),
+        'metadata' => {
+          'version' => agent_meta.version,
+          'commit' => agent_meta.commit_id,
+          'podNamespace' => agent_meta.pod_namespace,
+          'podName' => agent_meta.pod_name
+        }
+      })
+    end
+  end
+end