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47 lines
1.4 KiB
Ruby
47 lines
1.4 KiB
Ruby
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require File.expand_path('../../../spec_helper', __FILE__)
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require File.expand_path('../fixtures/classes', __FILE__)
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require File.expand_path('../shared/accessor', __FILE__)
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describe "Struct#hash" do
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it "returns the same fixnum for structs with the same content" do
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[StructClasses::Ruby.new("1.8.6", "PPC"),
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StructClasses::Car.new("Hugo", "Foo", "1972")].each do |stc|
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stc.hash.should == stc.dup.hash
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stc.hash.should be_kind_of(Fixnum)
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end
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end
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it "returns the same value if structs are #eql?" do
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car = StructClasses::Car.new("Honda", "Accord", "1998")
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similar_car = StructClasses::Car.new("Honda", "Accord", "1998")
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car.should eql(similar_car)
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car.hash.should == similar_car.hash
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end
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it "allows for overriding methods in an included module" do
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mod = Module.new do
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def hash
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"different"
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end
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end
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s = Struct.new(:arg) do
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include mod
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end
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s.new.hash.should == "different"
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end
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it "returns the same hash for recursive structs" do
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car = StructClasses::Car.new("Honda", "Accord", "1998")
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similar_car = StructClasses::Car.new("Honda", "Accord", "1998")
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car[:make] = car
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similar_car[:make] = car
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car.hash.should == similar_car.hash
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# This is because car.eql?(similar_car).
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# Objects that are eql? must return the same hash.
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# See the Struct#eql? specs
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end
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it_behaves_like :struct_accessor, :hash
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end
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