describe :key_error, shared: true do
  it "raises a KeyError" do
    -> {
      @method.call(@object, 'foo')
    }.should raise_error(KeyError)
  end

  ruby_version_is "2.5" do
    it "sets the Hash as the receiver of KeyError" do
      -> {
        @method.call(@object, 'foo')
      }.should raise_error(KeyError) { |err|
        err.receiver.should equal(@object)
      }
    end

    it "sets the unmatched key as the key of KeyError" do
      -> {
        @method.call(@object, 'foo')
      }.should raise_error(KeyError) { |err|
        err.key.to_s.should == 'foo'
      }
    end
  end
end