gistfile1.txt

require 'test/unit'

# patch in ^ operator support
class Gem::Version
  def bump_major
    self.class.new segments[0].succ
  end
end

Gem::Requirement.__send__ :remove_const, 'OPS'
Gem::Requirement.__send__ :remove_const, 'PATTERN_RAW'
Gem::Requirement.__send__ :remove_const, 'PATTERN'

class Gem::Requirement
  OPS = {
    "="  =>  lambda { |v, r| v == r },
    "!=" =>  lambda { |v, r| v != r },
    ">"  =>  lambda { |v, r| v >  r },
    "<"  =>  lambda { |v, r| v <  r },
    ">=" =>  lambda { |v, r| v >= r },
    "<=" =>  lambda { |v, r| v <= r },
    "~>" =>  lambda { |v, r| v >= r && v.release < r.bump },
    "^"  =>  lambda { |v, r| v >= r && v.release < r.bump_major }
  }.freeze

  quoted = OPS.keys.map { |k| Regexp.quote k }.join "|"
  PATTERN_RAW = "\\s*(#{quoted})?\\s*(#{Gem::Version::VERSION_PATTERN})\\s*".freeze
  PATTERN = /\A#{PATTERN_RAW}\z/.freeze
end

requirement = Gem::Requirement.new '^ 2.3.4'
puts requirement

class TestSemverOperator < Test::Unit::TestCase
  def test_simple
    requirement = Gem::Requirement.new '^ 2.3.4'

    assert_false requirement.satisfied_by? Gem::Version.create '2.2.5'
    assert_false requirement.satisfied_by? Gem::Version.create '2.3.3'
    assert requirement.satisfied_by? Gem::Version.create '2.3.4'
    assert requirement.satisfied_by? Gem::Version.create '2.4.0'
    assert requirement.satisfied_by? Gem::Version.create '2.5.0'
    assert_false requirement.satisfied_by? Gem::Version.create '3.0.0'
  end
end