1 files changed, 166 insertions, 0 deletions
diff --git a/spec/services/pod_logs/kubernetes_service_spec.rb b/spec/services/pod_logs/kubernetes_service_spec.rb
new file mode 100644
index 00000000000..9fab88a14f6
--- /dev/null
+++ b/spec/services/pod_logs/kubernetes_service_spec.rb
@@ -0,0 +1,166 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe ::PodLogs::KubernetesService do
+  include KubernetesHelpers
+
+  let_it_be(:cluster) { create(:cluster, :provided_by_gcp, environment_scope: '*') }
+  let(:namespace) { 'autodevops-deploy-9-production' }
+
+  let(:pod_name) { 'pod-1' }
+  let(:container_name) { 'container-1' }
+  let(:params) { {} }
+
+  let(:raw_logs) do
+    "2019-12-13T14:04:22.123456Z Log 1\n2019-12-13T14:04:23.123456Z Log 2\n" \
+      "2019-12-13T14:04:24.123456Z Log 3"
+  end
+
+  subject { described_class.new(cluster, namespace, params: params) }
+
+  describe '#pod_logs' do
+    let(:result_arg) do
+      {
+        pod_name: pod_name,
+        container_name: container_name
+      }
+    end
+
+    let(:expected_logs) { raw_logs }
+    let(:service) { create(:cluster_platform_kubernetes, :configured) }
+
+    it 'returns the logs' do
+      stub_kubeclient_logs(pod_name, namespace, container: container_name)
+
+      result = subject.send(:pod_logs, result_arg)
+
+      expect(result[:status]).to eq(:success)
+      expect(result[:logs]).to eq(expected_logs)
+    end
+
+    it 'handles Not Found errors from k8s' do
+      allow_any_instance_of(Gitlab::Kubernetes::KubeClient)
+        .to receive(:get_pod_log)
+        .with(any_args)
+        .and_raise(Kubeclient::ResourceNotFoundError.new(404, 'Not Found', {}))
+
+      result = subject.send(:pod_logs, result_arg)
+
+      expect(result[:status]).to eq(:error)
+      expect(result[:message]).to eq('Pod not found')
+    end
+
+    it 'handles HTTP errors from k8s' do
+      allow_any_instance_of(Gitlab::Kubernetes::KubeClient)
+        .to receive(:get_pod_log)
+        .with(any_args)
+        .and_raise(Kubeclient::HttpError.new(500, 'Error', {}))
+
+      result = subject.send(:pod_logs, result_arg)
+
+      expect(result[:status]).to eq(:error)
+      expect(result[:message]).to eq('Kubernetes API returned status code: 500')
+    end
+  end
+
+  describe '#encode_logs_to_utf8', :aggregate_failures do
+    let(:service) { create(:cluster_platform_kubernetes, :configured) }
+    let(:expected_logs) { '2019-12-13T14:04:22.123456Z ✔ Started logging errors to Sentry' }
+    let(:raw_logs) { expected_logs.dup.force_encoding(Encoding::ASCII_8BIT) }
+    let(:result) { subject.send(:encode_logs_to_utf8, result_arg) }
+
+    let(:result_arg) do
+      {
+        pod_name: pod_name,
+        container_name: container_name,
+        logs: raw_logs
+      }
+    end
+
+    it 'converts logs to utf-8' do
+      expect(result[:status]).to eq(:success)
+      expect(result[:logs]).to eq(expected_logs)
+    end
+
+    it 'returns error if output of encoding helper is blank' do
+      allow(Gitlab::EncodingHelper).to receive(:encode_utf8).and_return('')
+
+      expect(result[:status]).to eq(:error)
+      expect(result[:message]).to eq('Unable to convert Kubernetes logs encoding to UTF-8')
+    end
+
+    it 'returns error if output of encoding helper is nil' do
+      allow(Gitlab::EncodingHelper).to receive(:encode_utf8).and_return(nil)
+
+      expect(result[:status]).to eq(:error)
+      expect(result[:message]).to eq('Unable to convert Kubernetes logs encoding to UTF-8')
+    end
+
+    it 'returns error if output of encoding helper is not UTF-8' do
+      allow(Gitlab::EncodingHelper).to receive(:encode_utf8)
+        .and_return(expected_logs.encode(Encoding::UTF_16BE))
+
+      expect(result[:status]).to eq(:error)
+      expect(result[:message]).to eq('Unable to convert Kubernetes logs encoding to UTF-8')
+    end
+
+    context 'when logs are nil' do
+      let(:raw_logs) { nil }
+      let(:expected_logs) { nil }
+
+      it 'returns nil' do
+        expect(result[:status]).to eq(:success)
+        expect(result[:logs]).to eq(expected_logs)
+      end
+    end
+
+    context 'when logs are blank' do
+      let(:raw_logs) { (+'').force_encoding(Encoding::ASCII_8BIT) }
+      let(:expected_logs) { '' }
+
+      it 'returns blank string' do
+        expect(result[:status]).to eq(:success)
+        expect(result[:logs]).to eq(expected_logs)
+      end
+    end
+
+    context 'when logs are already in utf-8' do
+      let(:raw_logs) { expected_logs }
+
+      it 'does not fail' do
+        expect(result[:status]).to eq(:success)
+        expect(result[:logs]).to eq(expected_logs)
+      end
+    end
+  end
+
+  describe '#split_logs' do
+    let(:service) { create(:cluster_platform_kubernetes, :configured) }
+
+    let(:expected_logs) do
+      [
+        { message: "Log 1", timestamp: "2019-12-13T14:04:22.123456Z" },
+        { message: "Log 2", timestamp: "2019-12-13T14:04:23.123456Z" },
+        { message: "Log 3", timestamp: "2019-12-13T14:04:24.123456Z" }
+      ]
+    end
+
+    let(:result_arg) do
+      {
+        pod_name: pod_name,
+        container_name: container_name,
+        logs: raw_logs
+      }
+    end
+
+    it 'returns the logs' do
+      result = subject.send(:split_logs, result_arg)
+
+      aggregate_failures do
+        expect(result[:status]).to eq(:success)
+        expect(result[:logs]).to eq(expected_logs)
+      end
+    end
+  end
+end