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# frozen_string_literal: true
shared_examples "TestProf::MemoryProf::Tracker" do
let(:list) { TestProf::MemoryProf::Tracker::LinkedList.new(100) }
let(:example) { double("example") }
let(:group) { double("group") }
describe "#start" do
it "initializes a linked list" do
subject.start
expect(subject.list).to be_kind_of(TestProf::MemoryProf::Tracker::LinkedList)
end
end
describe "#finish" do
before do
allow(subject).to receive(:track).and_return(200)
allow(subject).to receive(:list).and_return(list)
end
it "sets total_memory" do
subject.finish
expect(subject.total_memory).to eq(100)
end
end
describe "#example_started" do
let(:example_started) { subject.example_started(example, {name: :example}) }
before do
allow(subject).to receive(:track).and_return(200)
allow(subject).to receive(:list).and_return(list)
end
it "tracks memory at the start of an example" do
example_started
expect(subject.list.head).to have_attributes(id: example, item: {name: :example}, memory_at_start: 200)
end
end
describe "#example_finished" do
let(:example_finished) { subject.example_finished(example) }
before do
list.add_node(example, {name: :example}, 200)
allow(subject).to receive(:track).and_return(350)
allow(subject).to receive(:list).and_return(list)
end
context "when the example memory > the memory of the top examples" do
before do
[75, 100, 125, 175, 200].each do |memory|
subject.examples << {memory: memory}
end
end
it "adds the example to the top examples" do
example_finished
expect(subject.examples).to match_array([
{memory: 200},
{memory: 175},
{name: :example, memory: 150},
{memory: 125},
{memory: 100}
])
end
end
context "when the example memory <= the memory of the top examples" do
before do
[175, 200, 225, 250, 275].each do |memory|
subject.examples << {memory: memory}
end
end
it "adds the example to the top examples" do
example_finished
expect(subject.examples).to match_array([
{memory: 275},
{memory: 250},
{memory: 225},
{memory: 200},
{memory: 175}
])
end
end
end
describe "#group_started" do
let(:group_started) { subject.group_started(group, {name: :group}) }
before do
allow(subject).to receive(:track).and_return(200)
allow(subject).to receive(:list).and_return(list)
end
it "tracks memory at the start of a group" do
group_started
expect(subject.list.head).to have_attributes(id: group, item: {name: :group}, memory_at_start: 200)
end
end
describe "#group_finished" do
let(:group_finished) { subject.group_finished(group) }
before do
list.add_node(group, {name: :group}, 200)
allow(subject).to receive(:track).and_return(350)
allow(subject).to receive(:list).and_return(list)
end
context "when the group memory > the memory of the top groups" do
before do
[75, 100, 125, 175, 200].each do |memory|
subject.groups << {memory: memory}
end
end
it "adds the group to the top groups" do
group_finished
expect(subject.groups).to match_array([
{memory: 200},
{memory: 175},
{name: :group, memory: 150},
{memory: 125},
{memory: 100}
])
end
end
context "when the group memory <= the memory of the top groups" do
before do
[175, 200, 225, 250, 275].each do |memory|
subject.groups << {memory: memory}
end
end
it "adds the group to the top groups" do
group_finished
expect(subject.groups).to match_array([
{memory: 275},
{memory: 250},
{memory: 225},
{memory: 200},
{memory: 175}
])
end
end
end
end
describe TestProf::MemoryProf::AllocTracker do
subject { described_class.new(5) }
if RUBY_ENGINE == "jruby"
it "raises an error" do
expect { subject }.to raise_error("Your Ruby Engine or OS is not supported")
end
else
it_behaves_like "TestProf::MemoryProf::Tracker"
describe "#track" do
before do
allow(GC).to receive(:stat).and_return({total_allocated_objects: 100})
end
it "returns the current number of allocations" do
expect(subject.track).to eq(100)
end
end
describe "#supported?" do
it "returns true" do
expect(subject.supported?).to be_truthy
end
end
end
end
describe TestProf::MemoryProf::RssTracker do
subject { described_class.new(5) }
let(:tool) { instance_double(TestProf::MemoryProf::Tracker::RssTool::PS, track: 100) }
before do
allow(TestProf::MemoryProf::Tracker::RssTool).to receive(:tool).and_return(tool)
end
it_behaves_like "TestProf::MemoryProf::Tracker"
describe "#track" do
it "returns the current rss" do
expect(subject.track).to eq(100)
end
end
describe "#supported?" do
context "when the host OS is supported" do
it "returns true" do
expect(subject.supported?).to be_truthy
end
end
context "when the host OS is not supported" do
let(:tool) { nil }
it "raises an error" do
expect { subject }.to raise_error("Your Ruby Engine or OS is not supported")
end
end
end
end
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