fixture_inner.rb

# frozen_string_literal: true
class FixtureInner
  def do_work
    raise unless sum == 2
  end

  def sum
    1 + 1
  end
end

fixture_outer.rb

# frozen_string_literal: true
class FixtureOuter
  def initialize
    @inner = FixtureInner.new
  end

  def do_work
    @inner.do_work
  end
end

rotoscope.csv

rotoscope_test.rb

def test_ignores_calls_if_blacklisted
  contents = rotoscope_trace do
    foo = FixtureOuter.new # line 91
    foo.do_work            # line 92
  end
end

def rotoscope_trace(blacklist = [], &block)
  Rotoscope.trace(@logfile, blacklist, &block)
  unzip(@logfile)
end

• "Last :line event" refers to keeping the most recent :line tracepoint location around so it can be used on invocations of :call and :return tracepoints
• "Tracepoint" refers to using rb_tracearg_path
• "Backtrace(1,2)" indicates using caller_locations(0, 1) for c_call and caller_locations(1,1) for call. In the end, identical results are returned using caller_locations(1,1) for bothc_call and call.