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$:.unshift File.expand_path('../../lib', __FILE__)

require 'stackprof'

require 'minitest/autorun'

require 'tempfile'

require 'pathname'

class StackProfTest < MiniTest::Test

def test_info

profile = StackProf.run{}

assert_equal 1.2, profile[:version]

assert_equal :wall, profile[:mode]

assert_equal 1000, profile[:interval]

assert_equal 0, profile[:samples]

end

def test_running

assert_equal false, StackProf.running?

StackProf.run{ assert_equal true, StackProf.running? }

end

def test_start_stop_results

assert_nil StackProf.results

assert_equal true, StackProf.start

assert_equal false, StackProf.start

assert_equal true, StackProf.running?

assert_nil StackProf.results

assert_equal true, StackProf.stop

assert_equal false, StackProf.stop

assert_equal false, StackProf.running?

assert_kind_of Hash, StackProf.results

assert_nil StackProf.results

end

def test_object_allocation

profile_base_line = __LINE__+1

profile = StackProf.run(mode: :object) do

Object.new

Object.new

end

assert_equal :object, profile[:mode]

assert_equal 1, profile[:interval]

assert_equal 2, profile[:samples]

frame = profile[:frames].values.first

assert_includes frame[:name], "StackProfTest#test_object_allocation"

assert_equal 2, frame[:samples]

assert_includes [profile_base_line - 2, profile_base_line], frame[:line]

assert_equal [1, 1], frame[:lines][profile_base_line+1]

assert_equal [1, 1], frame[:lines][profile_base_line+2]

frame = profile[:frames].values[1] if RUBY_VERSION < '2.3'

assert_equal [2, 0], frame[:lines][profile_base_line]

end

def test_object_allocation_interval

profile = StackProf.run(mode: :object, interval: 10) do

100.times { Object.new }

end

assert_equal 10, profile[:samples]

end

def test_cputime

profile = StackProf.run(mode: :cpu, interval: 500) do

math

end

assert_operator profile[:samples], :>=, 1

frame = profile[:frames].values.first

assert_includes frame[:name], "StackProfTest#math"

end

def test_walltime

profile = StackProf.run(mode: :wall) do

idle

end

frame = profile[:frames].values.first

assert_equal "StackProfTest#idle", frame[:name]

assert_in_delta 200, frame[:samples], 25

end

def test_custom

profile_base_line = __LINE__+1

profile = StackProf.run(mode: :custom) do

10.times do

StackProf.sample

end

end

assert_equal :custom, profile[:mode]

assert_equal 10, profile[:samples]

frame = profile[:frames].values.first

assert_includes frame[:name], "StackProfTest#test_custom"

assert_includes [profile_base_line-2, profile_base_line+1], frame[:line]

assert_equal [10, 10], frame[:lines][profile_base_line+2]

end

def test_raw

profile = StackProf.run(mode: :custom, raw: true) do

10.times do

StackProf.sample

end

end

raw = profile[:raw]

assert_equal 10, raw[-1]

assert_equal raw[0] + 2, raw.size

assert_includes profile[:frames][raw[-2]][:name], 'StackProfTest#test_raw'

assert_equal 10, profile[:raw_timestamp_deltas].size

end

def test_metadata

metadata = {

path: '/foo/bar',

revision: '5c0b01f1522ae8c194510977ae29377296dd236b',

}

profile = StackProf.run(mode: :cpu, metadata: metadata) do

math

end

assert_equal metadata, profile[:metadata]

end

def test_empty_metadata

profile = StackProf.run(mode: :cpu) do

math

end

assert_equal({}, profile[:metadata])

end

def test_raises_if_metadata_is_not_a_hash

exception = assert_raises ArgumentError do

StackProf.run(mode: :cpu, metadata: 'foobar') do

math

end

end

assert_equal 'metadata should be a hash', exception.message

end

def test_fork

StackProf.run do

pid = fork do

exit! StackProf.running?? 1 : 0

end

Process.wait(pid)

assert_equal 0, $?.exitstatus

assert_equal true, StackProf.running?

end

end

def foo(n = 10)

if n == 0

StackProf.sample

return

end

foo(n - 1)

end

def test_recursive_total_samples

profile = StackProf.run(mode: :cpu, raw: true) do

10.times do

foo

end

end

frame = profile[:frames].values.find do |frame|

frame[:name] == "StackProfTest#foo"

end

assert_equal 10, frame[:total_samples]

end

def test_gc

profile = StackProf.run(interval: 100, raw: true) do

5.times do

GC.start

end

end

raw = profile[:raw]

gc_frame = profile[:frames].values.find{ |f| f[:name] == "(garbage collection)" }

marking_frame = profile[:frames].values.find{ |f| f[:name] == "(marking)" }

sweeping_frame = profile[:frames].values.find{ |f| f[:name] == "(sweeping)" }

assert gc_frame

assert marking_frame

assert sweeping_frame

assert_equal gc_frame[:total_samples], profile[:gc_samples]

assert_equal profile[:gc_samples], [gc_frame, marking_frame, sweeping_frame].map{|x| x[:samples] }.inject(:+)

assert_operator profile[:gc_samples], :>, 0

assert_operator profile[:missed_samples], :<=, 25

end

def test_out

tmpfile = Tempfile.new('stackprof-out')

ret = StackProf.run(mode: :custom, out: tmpfile) do

StackProf.sample

end

assert_equal tmpfile, ret

tmpfile.rewind

profile = Marshal.load(tmpfile.read)

refute_empty profile[:frames]

end

def test_out_to_path_string

tmpfile = Tempfile.new('stackprof-out')

ret = StackProf.run(mode: :custom, out: tmpfile.path) do

StackProf.sample

end

refute_equal tmpfile, ret

assert_equal tmpfile.path, ret.path

tmpfile.rewind

profile = Marshal.load(tmpfile.read)

refute_empty profile[:frames]

end

def test_pathname_out

tmpfile = Tempfile.new('stackprof-out')

pathname = Pathname.new(tmpfile.path)

ret = StackProf.run(mode: :custom, out: pathname) do

StackProf.sample

end

assert_equal tmpfile.path, ret.path

tmpfile.rewind

profile = Marshal.load(tmpfile.read)

refute_empty profile[:frames]

end

def test_min_max_interval

[-1, 0, 1_000_000, 1_000_001].each do |invalid_interval|

err = assert_raises(ArgumentError, "invalid interval #{invalid_interval}") do

StackProf.run(interval: invalid_interval, debug: true) {}

end

assert_match(/microseconds/, err.message)

end

end

def math

250_000.times do

2 ** 10

end

end

def idle

r, w = IO.pipe

IO.select([r], nil, nil, 0.2)

ensure

r.close

w.close

end

end