diff options
Diffstat (limited to 'spec/lib/gitlab/middleware/memory_report_spec.rb')
-rw-r--r-- | spec/lib/gitlab/middleware/memory_report_spec.rb | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/spec/lib/gitlab/middleware/memory_report_spec.rb b/spec/lib/gitlab/middleware/memory_report_spec.rb new file mode 100644 index 00000000000..e063866b056 --- /dev/null +++ b/spec/lib/gitlab/middleware/memory_report_spec.rb @@ -0,0 +1,91 @@ +# frozen_string_literal: true + +require 'spec_helper' +require 'memory_profiler' + +RSpec.describe Gitlab::Middleware::MemoryReport do + let(:app) { proc { |env| [200, { 'Content-Type' => 'text/plain' }, ['Hello world!']] } } + let(:middleware) { described_class.new(app) } + + describe '#call' do + shared_examples 'returns original response' do + it 'returns original response' do + expect(MemoryProfiler).not_to receive(:report) + + status, headers, body = middleware.call(env) + + expect(status).to eq(200) + expect(headers).to eq({ 'Content-Type' => 'text/plain' }) + expect(body.first).to eq('Hello world!') + end + + it 'does not call the MemoryProfiler' do + expect(MemoryProfiler).not_to receive(:report) + + middleware.call(env) + end + end + + context 'when the Rails environment is not development' do + let(:env) { Rack::MockRequest.env_for('/') } + + it_behaves_like 'returns original response' + end + + context 'when the Rails environment is development' do + before do + allow(Rails.env).to receive(:development?).and_return(true) + end + + context 'when memory report is not requested' do + let(:env) { Rack::MockRequest.env_for('/') } + + it_behaves_like 'returns original response' + end + + context 'when memory report is requested' do + let(:env) { Rack::MockRequest.env_for('/', params: { 'performance_bar' => 'memory' }) } + + before do + allow(env).to receive(:[]).and_call_original + allow(app).to receive(:call).and_return(empty_memory_report) + end + + let(:empty_memory_report) do + report = MemoryProfiler::Results.new + report.register_results(MemoryProfiler::StatHash.new, MemoryProfiler::StatHash.new, 1) + end + + it 'returns a memory report' do + expect(MemoryProfiler).to receive(:report).and_yield + + status, headers, body = middleware.call(env) + + expect(status).to eq(200) + expect(headers).to eq({ 'Content-Type' => 'text/plain' }) + expect(body.first).to include('Total allocated: 0 B') + end + + context 'when something goes wrong with creating the report' do + before do + expect(MemoryProfiler).to receive(:report).and_raise(StandardError, 'something went terribly wrong!') + end + + it 'logs the error' do + expect(::Gitlab::ErrorTracking).to receive(:track_exception) + + middleware.call(env) + end + + it 'returns the error' do + status, headers, body = middleware.call(env) + + expect(status).to eq(500) + expect(headers).to eq({ 'Content-Type' => 'text/plain' }) + expect(body.first).to include('Could not generate memory report: something went terribly wrong!') + end + end + end + end + end +end |