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assert 'ObjectSpace.memsize_of' do
# immediate literals
int_size = ObjectSpace.memsize_of 1
assert_equal int_size, 0, 'int zero'
sym_size = ObjectSpace.memsize_of :foo
assert_equal sym_size, 0, 'sym zero'
assert_equal ObjectSpace.memsize_of(true), int_size
assert_equal ObjectSpace.memsize_of(false), int_size
assert_not_equal ObjectSpace.memsize_of('a'), 0, 'memsize of str'
if __ENCODING__ == "UTF-8"
assert_not_equal ObjectSpace.memsize_of("こんにちは世界"), 0, 'memsize of utf8 str'
end
# class defs
class_obj_size = ObjectSpace.memsize_of Class
assert_not_equal class_obj_size, 0, 'Class obj not zero'
empty_class_def_size = ObjectSpace.memsize_of Class.new
assert_not_equal empty_class_def_size, 0, 'Class def not zero'
proc_size = ObjectSpace.memsize_of Proc.new { x = 1; x }
assert_not_equal proc_size, 0
class_with_methods = Class.new do
def foo
a = 0
a + 1
end
end
m_size = ObjectSpace.memsize_of class_with_methods.instance_method(:foo)
assert_not_equal m_size, 0, 'method size not zero'
# collections
empty_array_size = ObjectSpace.memsize_of []
assert_not_equal empty_array_size, 0, 'empty array size not zero'
assert_operator empty_array_size, :<, ObjectSpace.memsize_of(Array.new(16)), 'large array size greater than embed'
# fiber
empty_fiber_size = ObjectSpace.memsize_of(Fiber.new {})
assert_not_equal empty_fiber_size, 0, 'empty fiber not zero'
#hash
assert_not_equal ObjectSpace.memsize_of({}), 0, 'empty hash size not zero'
end
assert 'ObjectSpace.memsize_of_all' do
foo_class = Class.new do
def initialize
@a = 'a'
@b = 'b'
end
end
foos = Array.new(10) { foo_class.new }
foo_size = ObjectSpace.memsize_of(foos.first)
assert_equal ObjectSpace.memsize_of_all(foo_class), foo_size * foos.size, 'Memsize of all instance'
end
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