tuple_spec.rb

require 'rspec'
require './tuple'

# f(“()”) -> true
# f(“(1,2,988)”) -> true
# f(“(1,23,(4,5),076)”) -> true

describe 'tuple' do
  it "can be empty" do
    expect(TupleValidation.is_tuple?("()")).to eq(true)
  end

  it "can have many digits" do
    expect(TupleValidation.is_tuple?("(1,2,988)")).to eq(true)
  end

  it "can contain other tuples" do
    expect(TupleValidation.is_tuple?("“(1,23,(4,5),076)”")).to be(true)
  end

  it "should have the same number of opening and closing parenthesis" do
    expect(TupleValidation.is_tuple?("())")).to eq(false)
  end
end