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