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Contents
# Copyright 2014 Google Inc. All Rights Reserved.
# Licensed under the Apache License, Version 2.0, found in the LICENSE file.
require_relative File.join("spec_helper")
describe AllocationStats do
it "should trace everything if TRACE_PROCESS_ALLOCATIONS" do
IO.popen({"TRACE_PROCESS_ALLOCATIONS" => "1"}, "ruby -r ./lib/allocation_stats -e 'puts 0'") do |io|
out = io.read
out.should match("Object Allocation Report")
end
end
it "should only track new objects" do
existing_array = [1,2,3,4,5]
stats = AllocationStats.trace do
new_array = [1,2,3,4,5]
end
stats.new_allocations.class.should be Array
stats.new_allocations.size.should == 1
end
it "should only track new objects, non-block mode" do
existing_array = [1,2,3,4,5]
stats = AllocationStats.trace
new_array = [1,2,3,4,5]
stats.stop
stats.new_allocations.class.should be Array
stats.new_allocations.size.should == 1
end
it "should only track new objects; String keys in Hashes are frozen" do
existing_array = [1,2,3,4,5]
stats = AllocationStats.trace do
new_hash = {"foo" => "bar", "baz" => "quux"}
end
stats.new_allocations.size.should == 3
end
it "should only track new objects, using instance method" do
existing_array = [1,2,3,4,5]
stats = AllocationStats.new
stats.trace do
new_object = Object.new
new_array = [4]
new_string = "yarn"
end
stats.new_allocations.class.should be Array
stats.new_allocations.size.should == 3
end
it "should only track new objects" do
existing_array = [1,2,3,4,5]
my_instance = MyClass.new
stats = AllocationStats.new(burn: 3).trace do
# this method instantiates 2**(n-1) Strings on the n'th call
my_instance.memoizing_method
end
stats.new_allocations.class.should be Array
stats.new_allocations.size.should == 8
end
end
Version data entries
6 entries across 5 versions & 2 rubygems