diff options
Diffstat (limited to 'spec/ruby/core/struct/hash_spec.rb')
-rw-r--r-- | spec/ruby/core/struct/hash_spec.rb | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/spec/ruby/core/struct/hash_spec.rb b/spec/ruby/core/struct/hash_spec.rb new file mode 100644 index 0000000000..517d3ab44e --- /dev/null +++ b/spec/ruby/core/struct/hash_spec.rb @@ -0,0 +1,46 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) +require File.expand_path('../shared/accessor', __FILE__) + +describe "Struct#hash" do + + it "returns the same fixnum for structs with the same content" do + [StructClasses::Ruby.new("1.8.6", "PPC"), + StructClasses::Car.new("Hugo", "Foo", "1972")].each do |stc| + stc.hash.should == stc.dup.hash + stc.hash.should be_kind_of(Fixnum) + end + end + + it "returns the same value if structs are #eql?" do + car = StructClasses::Car.new("Honda", "Accord", "1998") + similar_car = StructClasses::Car.new("Honda", "Accord", "1998") + car.should eql(similar_car) + car.hash.should == similar_car.hash + end + + it "allows for overriding methods in an included module" do + mod = Module.new do + def hash + "different" + end + end + s = Struct.new(:arg) do + include mod + end + s.new.hash.should == "different" + end + + it "returns the same hash for recursive structs" do + car = StructClasses::Car.new("Honda", "Accord", "1998") + similar_car = StructClasses::Car.new("Honda", "Accord", "1998") + car[:make] = car + similar_car[:make] = car + car.hash.should == similar_car.hash + # This is because car.eql?(similar_car). + # Objects that are eql? must return the same hash. + # See the Struct#eql? specs + end + + it_behaves_like :struct_accessor, :hash +end |