100 lines
2.3 KiB
Ruby
100 lines
2.3 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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RSpec.describe Gitlab::Memory::Instrumentation do
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include MemoryInstrumentationHelper
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before do
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skip_memory_instrumentation!
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end
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describe '.available?' do
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it 'returns true' do
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expect(described_class).to be_available
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end
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end
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describe '.start_thread_memory_allocations' do
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subject { described_class.start_thread_memory_allocations }
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context 'when feature flag trace_memory_allocations is enabled' do
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before do
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stub_feature_flags(trace_memory_allocations: true)
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end
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it 'a hash is returned' do
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is_expected.not_to be_empty
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end
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end
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context 'when feature flag trace_memory_allocations is disabled' do
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before do
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stub_feature_flags(trace_memory_allocations: false)
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end
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it 'a nil is returned' do
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is_expected.to be_nil
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end
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end
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context 'when feature is unavailable' do
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before do
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allow(described_class).to receive(:available?) { false }
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end
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it 'a nil is returned' do
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is_expected.to be_nil
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end
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end
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end
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describe '.with_memory_allocations' do
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let(:ntimes) { 100 }
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subject do
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described_class.with_memory_allocations do
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Array.new(1000).map { '0' * 100 }
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end
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end
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before do
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expect(described_class).to receive(:start_thread_memory_allocations).and_call_original
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expect(described_class).to receive(:measure_thread_memory_allocations).and_call_original
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end
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context 'when feature flag trace_memory_allocations is enabled' do
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before do
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stub_feature_flags(trace_memory_allocations: true)
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end
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it 'a hash is returned' do
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is_expected.to include(
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mem_objects: be > 1000,
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mem_mallocs: be > 1000,
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mem_bytes: be > 100_000 # 100 items * 100 bytes each
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)
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end
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end
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context 'when feature flag trace_memory_allocations is disabled' do
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before do
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stub_feature_flags(trace_memory_allocations: false)
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end
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it 'a nil is returned' do
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is_expected.to be_nil
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end
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end
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context 'when feature is unavailable' do
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before do
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allow(described_class).to receive(:available?) { false }
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end
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it 'a nil is returned' do
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is_expected.to be_nil
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end
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end
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end
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end
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