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: test_gem_resolver_vendor_specification.rb
    path of file: ./repos/artichoke/artichoke-backend/vendor/ruby/test/rubygems
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require_relative 'helper'

class TestGemResolverVendorSpecification < Gem::TestCase
  def setup
    super

    @set  = Gem::Resolver::VendorSet.new
    @spec = Gem::Specification.new 'a', 1
  end

  def test_equals2
    v_spec_a = Gem::Resolver::VendorSpecification.new @set, @spec

    assert_equal v_spec_a, v_spec_a

    spec_b = Gem::Specification.new 'b', 1
    v_spec_b = Gem::Res
    
  def test_equals2
    v_spec_a = Gem::Resolver::VendorSpecification.new @set, @spec

    assert_equal v_spec_a, v_spec_a

    spec_b = Gem::Specification.new 'b', 1
    v_spec_b = Gem::Resolver::VendorSpecification.new @set, spec_b

    refute_equal v_spec_a, v_spec_b

    v_set = Gem::Resolver::VendorSet.new
    v_spec_s = Gem::Resolver::VendorSpecification.new v_set, @spec

    refute_equal v_spec_a, v_spec_s

    i_set  = Gem::Resolver::IndexSet.new
    source = Gem::Source.new @gem_repo
    i_spec = Gem::Resolver::IndexSpecification.new(
      i_set, 'a', v(1), source, Gem::Platform::RUBY)

    refute_equal v_spec_a, i_spec
  end