Initial ObjectSpace.memsize_of implementation

1 files changed, 76 insertions, 0 deletions

diff --git a/mrbgems/mruby-objectspace/test/objectspace.rb b/mrbgems/mruby-objectspace/test/objectspace.rb
index 9c44c2157..d26fd5a9e 100644
--- a/mrbgems/mruby-objectspace/test/objectspace.rb
+++ b/mrbgems/mruby-objectspace/test/objectspace.rb
@@ -1,3 +1,4 @@
+# coding: utf-8
 assert('ObjectSpace.count_objects') do
   h = {}
   f = Fiber.new {} if Object.const_defined?(:Fiber)
@@ -58,3 +59,78 @@ end
 assert 'Check class pointer of ObjectSpace.each_object.' do
   assert_nothing_raised { ObjectSpace.each_object { |obj| !obj } }
 end
+
+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
+
+  float_size = if Object.const_defined? :Float
+                 ObjectSpace.memsize_of 1.0
+               else
+                 nil
+               end
+
+  # need some way of asking if floats are boxed
+  assert_equal float_size, 0 if float_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
+
+  assert_not_equal ObjectSpace.memsize_of(0..1), 0, 'range not zero'
+
+  # 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
+
+  # need access to struct iv_tbl
+  # assert_not_equal empty_class_def_size, 0, 'Class def not zero'
+
+  class_without_methods = Class.new do
+    @a = 1
+    @b = 2
+  end
+  class_total_size = empty_class_def_size + (int_size * 2)
+  assert_equal ObjectSpace.memsize_of(class_without_methods), class_total_size, 'class without methods size'
+
+  module_without_methods = Module.new do
+    @a = 1
+    @b = 2
+  end
+  module_total_size = empty_class_def_size + (int_size * 2)
+  assert_equal ObjectSpace.memsize_of(module_without_methods), module_total_size, 'module without methods size'
+
+  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
+  assert_equal ObjectSpace.memsize_of([]), 0, 'empty array size zero'
+  assert_not_equal ObjectSpace.memsize_of(Array.new(16)), 0, 'array size non zero'
+
+  # fiber
+  assert_not_equal ObjectSpace.memsize_of(Fiber.new {}), 0, 'fiber non zero'
+
+  skip 'No hash table support yet'
+  assert_equal ObjectSpace.memsize_of({}), 0, 'empty hash size zero'
+end