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* Other ruby implementations use the spec/ruby directory. [Misc #13792] [ruby-core:82287] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
27 lines
820 B
Ruby
27 lines
820 B
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
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require File.expand_path('../fixtures/classes', __FILE__)
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describe "Hash#invert" do
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it "returns a new hash where keys are values and vice versa" do
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{ 1 => 'a', 2 => 'b', 3 => 'c' }.invert.should ==
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{ 'a' => 1, 'b' => 2, 'c' => 3 }
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end
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it "handles collisions by overriding with the key coming later in keys()" do
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h = { a: 1, b: 1 }
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override_key = h.keys.last
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h.invert[1].should == override_key
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end
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it "compares new keys with eql? semantics" do
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h = { a: 1.0, b: 1 }
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i = h.invert
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i[1.0].should == :a
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i[1].should == :b
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end
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it "does not return subclass instances for subclasses" do
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HashSpecs::MyHash[1 => 2, 3 => 4].invert.class.should == Hash
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HashSpecs::MyHash[].invert.class.should == Hash
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end
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end
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