Given /^the environment variable (.+) is nil$/ do |variable|
  set_environment_variable(variable, nil)
end

Given /^the environment variable (.+) is "(.+)"$/ do |variable, value|
  set_environment_variable(variable, value)
end

Given /^the environment variable (.+) is \$TEST_BERKSHELF_ARTIFACTORY_API_KEY$/ do |variable|
  set_environment_variable(variable, ENV['TEST_BERKSHELF_ARTIFACTORY_API_KEY'])
end