test_spec.rb

RSpec.describe 'test' do
  it 'compares with eq' do
    expect(BigDecimal.new('19.99')).to eq BigDecimal.new('19.99')
  end

  class Foo
    def price
      BigDecimal.new('19.99')
    end
  end

  it 'compares with have_attributes' do
    expect(Foo.new).to have_attributes(price: BigDecimal.new('19.99'))
  end
end