require 'rubygems/test_case'

class TestKernel < Gem::TestCase

  def setup
    super

    @old_path = $:.dup

    util_make_gems
  end

  def teardown
    super

    $:.replace @old_path
  end

  def test_gem
    assert gem('a', '= 1'), "Should load"
    assert $:.any? { |p| %r{a-1/lib} =~ p }
  end

  def test_gem_redundant
    assert gem('a', '= 1'), "Should load"
    refute gem('a', '= 1'), "Should not load"
    assert_equal 1, $:.select { |p| %r{a-1/lib} =~ p }.size
  end

  def test_gem_overlapping
    assert gem('a', '= 1'), "Should load"
    refute gem('a', '>= 1'), "Should not load"
    assert_equal 1, $:.select { |p| %r{a-1/lib} =~ p }.size
  end

  def test_gem_conflicting
    assert gem('a', '= 1'), "Should load"

    ex = assert_raises Gem::LoadError do
      gem 'a', '= 2'
    end

    assert_equal "can't activate a-2, already activated a-1", ex.message
    assert_match(/activated a-1/, ex.message)
    assert_equal 'a', ex.name

    assert $:.any? { |p| %r{a-1/lib} =~ p }
    refute $:.any? { |p| %r{a-2/lib} =~ p }
  end

  def test_gem_not_adding_bin
    assert gem('a', '= 1'), "Should load"
    refute $:.any? { |p| %r{a-1/bin} =~ p }
  end
end