diff options
Diffstat (limited to 'spec/ruby/library/objectspace/memsize_of_spec.rb')
-rw-r--r-- | spec/ruby/library/objectspace/memsize_of_spec.rb | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/spec/ruby/library/objectspace/memsize_of_spec.rb b/spec/ruby/library/objectspace/memsize_of_spec.rb new file mode 100644 index 0000000000..06a80d9f9c --- /dev/null +++ b/spec/ruby/library/objectspace/memsize_of_spec.rb @@ -0,0 +1,30 @@ +require_relative '../../spec_helper' +require 'objspace' + +describe "ObjectSpace.memsize_of" do + it "returns 0 for true, false and nil" do + ObjectSpace.memsize_of(true).should == 0 + ObjectSpace.memsize_of(false).should == 0 + ObjectSpace.memsize_of(nil).should == 0 + end + + it "returns 0 for small Integers" do + ObjectSpace.memsize_of(42).should == 0 + end + + it "returns an Integer for an Object" do + obj = Object.new + ObjectSpace.memsize_of(obj).should be_kind_of(Integer) + ObjectSpace.memsize_of(obj).should > 0 + end + + it "is larger if the Object has more instance variables" do + obj = Object.new + before = ObjectSpace.memsize_of(obj) + 100.times do |i| + obj.instance_variable_set(:"@foo#{i}", nil) + end + after = ObjectSpace.memsize_of(obj) + after.should > before + end +end |