brew/Library/Homebrew/test/test_upgrade.rb

require "helper/integration_command_test_case"

class IntegrationCommandTestUpgrade < IntegrationCommandTestCase
  def test_upgrade
    setup_test_formula "testball"
    (HOMEBREW_CELLAR/"testball/0.0.1/foo").mkpath

    cmd("upgrade")
    assert((HOMEBREW_CELLAR/"testball/0.1").directory?,
      "The latest version directory should be created")
  end
end