92 lines
2.8 KiB
Ruby
92 lines
2.8 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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require 'memory_profiler'
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RSpec.describe Gitlab::Middleware::MemoryReport do
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let(:app) { proc { |env| [200, { 'Content-Type' => 'text/plain' }, ['Hello world!']] } }
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let(:middleware) { described_class.new(app) }
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describe '#call' do
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shared_examples 'returns original response' do
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it 'returns original response' do
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expect(MemoryProfiler).not_to receive(:report)
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status, headers, body = middleware.call(env)
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expect(status).to eq(200)
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expect(headers).to eq({ 'Content-Type' => 'text/plain' })
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expect(body.first).to eq('Hello world!')
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end
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it 'does not call the MemoryProfiler' do
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expect(MemoryProfiler).not_to receive(:report)
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middleware.call(env)
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end
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end
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context 'when the Rails environment is not development' do
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let(:env) { Rack::MockRequest.env_for('/') }
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it_behaves_like 'returns original response'
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end
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context 'when the Rails environment is development' do
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before do
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allow(Rails.env).to receive(:development?).and_return(true)
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end
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context 'when memory report is not requested' do
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let(:env) { Rack::MockRequest.env_for('/') }
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it_behaves_like 'returns original response'
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end
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context 'when memory report is requested' do
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let(:env) { Rack::MockRequest.env_for('/', params: { 'performance_bar' => 'memory' }) }
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before do
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allow(env).to receive(:[]).and_call_original
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allow(app).to receive(:call).and_return(empty_memory_report)
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end
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let(:empty_memory_report) do
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report = MemoryProfiler::Results.new
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report.register_results(MemoryProfiler::StatHash.new, MemoryProfiler::StatHash.new, 1)
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end
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it 'returns a memory report' do
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expect(MemoryProfiler).to receive(:report).and_yield
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status, headers, body = middleware.call(env)
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expect(status).to eq(200)
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expect(headers).to eq({ 'Content-Type' => 'text/plain' })
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expect(body.first).to include('Total allocated: 0 B')
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end
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context 'when something goes wrong with creating the report' do
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before do
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expect(MemoryProfiler).to receive(:report).and_raise(StandardError, 'something went terribly wrong!')
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end
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it 'logs the error' do
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expect(::Gitlab::ErrorTracking).to receive(:track_exception)
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middleware.call(env)
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end
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it 'returns the error' do
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status, headers, body = middleware.call(env)
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expect(status).to eq(500)
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expect(headers).to eq({ 'Content-Type' => 'text/plain' })
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expect(body.first).to include('Could not generate memory report: something went terribly wrong!')
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end
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end
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end
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end
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end
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end
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