describe :hash_length, shared: true do
  it "returns the number of entries" do
    new_hash(a: 1, b: 'c').send(@method).should == 2
    new_hash(a: 1, b: 2, a: 2).send(@method).should == 2
    new_hash(a: 1, b: 1, c: 1).send(@method).should == 3
    new_hash().send(@method).should == 0
    new_hash(5).send(@method).should == 0
    new_hash { 5 }.send(@method).should == 0
  end
end
