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37 lines
983 B
Ruby
37 lines
983 B
Ruby
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require File.expand_path('../../../spec_helper', __FILE__)
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describe "Hash" do
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it "includes Enumerable" do
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Hash.include?(Enumerable).should == true
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end
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end
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describe "Hash#hash" do
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it "returns a value which doesn't depend on the hash order" do
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{ 0=>2, 11=>1 }.hash.should == { 11=>1, 0=>2 }.hash
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end
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it "generates a hash for recursive hash structures" do
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h = {}
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h[:a] = h
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(h.hash == h[:a].hash).should == true
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end
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it "returns the same hash for recursive hashes" do
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h = {} ; h[:x] = h
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h.hash.should == {x: h}.hash
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h.hash.should == {x: {x: h}}.hash
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# This is because h.eql?(x: h)
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# Remember that if two objects are eql?
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# then the need to have the same hash.
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# Check the Hash#eql? specs!
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end
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it "returns the same hash for recursive hashes through arrays" do
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h = {} ; rec = [h] ; h[:x] = rec
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h.hash.should == {x: rec}.hash
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h.hash.should == {x: [h]}.hash
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# Like above, because h.eql?(x: [h])
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end
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end
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