require_relative '../../spec_helper' require_relative 'fixtures/classes' require_relative 'shared/accessor' describe "Struct#hash" do it "returns the same integer 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(Integer) 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 "returns different hashes for structs with different values" do s1 = StructClasses::Ruby.new('2.7.0', 'linux') s2 = StructClasses::Ruby.new('2.7.0', 'macos') s1.hash.should_not == s2.hash end it "returns different hashes for structs with different values when using keyword_init: true" do key = :"1 non symbol member" struct_class = Struct.new(key, keyword_init: true) t1 = struct_class.new(key => 1) t2 = struct_class.new(key => 2) t1.hash.should_not == t2.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 "returns different hashes for different struct classes" do Struct.new(:x).new(1).hash.should != Struct.new(:y).new(1).hash end it_behaves_like :struct_accessor, :hash end