You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: equal.rb
    path of file: ./repos/ferrocarril/spec-runner/spec/ruby/core/hash/shared
    
    the code of the file until where you have to start completion: describe :hash_equal, shared: true do
  it "does not compare values when keys don't match" do
    value = mock('x')
    value.should_not_receive(:==)
    value.should_not_receive(:eql?)
    { 1 => value }.send(@method, { 2 => value }).should be_false
  end

  it "r
    
    def x.hash() 0 end
    def y.hash() 1 end

    { x => 1 }.send(@method, { y => 1 }).should be_false
  end

  it "computes equality for recursive hashes" do
    h = {}
    h[:a] = h
    h.send(@method, h[:a]).should be_true
    (h == h[:a]).should be_true
  end

  it "computes equality for complex recursive hashes" do
    a, b = {}, {}
    a.merge! self: a, other: b
    b.merge! self: b, other: a
    a.send(@method, b).should be_true # they both have the same structure!

    c = {}
    c.merge! other: c, self: c
    c.send(@method, a).should be_true # subtle, but they both have the same structure!
    a[:delta] = c[:delta] = a
    c.send(@method, a).should be_false # not quite the same structure, as a[:other][:delta] = nil
    c[:delta] = 42
    c.send(@method, a).should be_false
    a[:delta] = 42
    c.send(@method, a).should be_false
    b[:delta] = 42
    c.send(@method, a).should be_true
  end

  it "computes equality for recursive hashes & arrays" do
    x, y, z = [], [], []
    a, b, c = {foo: x, bar: 42}, {foo: y, bar: 42}, {foo: z, bar: 42}
    x << a
    y << c
    z << b
    b.send(@method, c).should be_true # they clearly have the same structure!
    y.send(@method, z).should be_true
    a.send(@method, b).should be_true # subtle, but they both have the same structure!
    x.send(@method, y).should be_true
    y << x
    y.send(@method, z).should be_false
    z << x
    y.send(@method, z).should be_true

    a[:foo], a[:bar] = a[:bar], a[:foo]
    a.send(@method, b).should be_false
    b[:bar] = b[:foo]
    b.send(@method, c).should be_false
  end
end