Add latest changes from gitlab-org/gitlab@master

1 files changed, 115 insertions, 0 deletions

diff --git a/spec/lib/gitlab/metrics/exporter/base_exporter_spec.rb b/spec/lib/gitlab/metrics/exporter/base_exporter_spec.rb
new file mode 100644
index 00000000000..5fd7438d28a
--- /dev/null
+++ b/spec/lib/gitlab/metrics/exporter/base_exporter_spec.rb
@@ -0,0 +1,115 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::Metrics::Exporter::BaseExporter do
+  let(:exporter) { described_class.new }
+  let(:server) { double('server') }
+  let(:socket) { double('socket') }
+  let(:log_filename) { File.join(Rails.root, 'log', 'sidekiq_exporter.log') }
+  let(:settings) { double('settings') }
+
+  before do
+    allow(::WEBrick::HTTPServer).to receive(:new).and_return(server)
+    allow(server).to receive(:mount)
+    allow(server).to receive(:start)
+    allow(server).to receive(:shutdown)
+    allow(server).to receive(:listeners) { [socket] }
+    allow(socket).to receive(:close)
+    allow_any_instance_of(described_class).to receive(:log_filename).and_return(log_filename)
+    allow_any_instance_of(described_class).to receive(:settings).and_return(settings)
+  end
+
+  describe 'when exporter is enabled' do
+    before do
+      allow(settings).to receive(:enabled).and_return(true)
+      allow(settings).to receive(:port).and_return(3707)
+      allow(settings).to receive(:address).and_return('localhost')
+    end
+
+    describe 'when exporter is stopped' do
+      describe '#start' do
+        it 'starts the exporter' do
+          expect { exporter.start.join }.to change { exporter.thread? }.from(false).to(true)
+
+          expect(server).to have_received(:start)
+        end
+
+        describe 'with custom settings' do
+          let(:port) { 99999 }
+          let(:address) { 'sidekiq_exporter_address' }
+
+          before do
+            allow(settings).to receive(:port).and_return(port)
+            allow(settings).to receive(:address).and_return(address)
+          end
+
+          it 'starts server with port and address from settings' do
+            exporter.start.join
+
+            expect(::WEBrick::HTTPServer).to have_received(:new).with(
+              Port: port,
+              BindAddress: address,
+              Logger: anything,
+              AccessLog: anything
+            )
+          end
+        end
+      end
+
+      describe '#stop' do
+        it "doesn't shutdown stopped server" do
+          expect { exporter.stop }.not_to change { exporter.thread? }
+
+          expect(server).not_to have_received(:shutdown)
+        end
+      end
+    end
+
+    describe 'when exporter is running' do
+      before do
+        exporter.start.join
+      end
+
+      describe '#start' do
+        it "doesn't start running server" do
+          expect { exporter.start.join }.not_to change { exporter.thread? }
+
+          expect(server).to have_received(:start).once
+        end
+      end
+
+      describe '#stop' do
+        it 'shutdowns server' do
+          expect { exporter.stop }.to change { exporter.thread? }.from(true).to(false)
+
+          expect(socket).to have_received(:close)
+          expect(server).to have_received(:shutdown)
+        end
+      end
+    end
+  end
+
+  describe 'when exporter is disabled' do
+    before do
+      allow(settings).to receive(:enabled).and_return(false)
+    end
+
+    describe '#start' do
+      it "doesn't start" do
+        expect(exporter.start).to be_nil
+        expect { exporter.start }.not_to change { exporter.thread? }
+
+        expect(server).not_to have_received(:start)
+      end
+    end
+
+    describe '#stop' do
+      it "doesn't shutdown" do
+        expect { exporter.stop }.not_to change { exporter.thread? }
+
+        expect(server).not_to have_received(:shutdown)
+      end
+    end
+  end
+end