Contents

#encoding: utf-8

# Main
module CommandExec
  # Helpers for specs
  module SpecHelper
    # Capture stderr 
    #
    # @param [Block] block
    def capture_stderr(&block)
      previous_stderr, $stderr = $stderr, StringIO.new
      block.call
      return $stderr.string
    ensure
      $stderr = previous_stderr
    end

    # Capture stdout
    #
    # @param [Block] block
    def capture_stdout(&block)
      previous_stdout, $stdout = $stdout, StringIO.new
      block.call
      return $stdout.string
    ensure
      $stdout = previous_stdout
    end

    # Manipulate environment for the given block
    #
    # @param [Hash] env
    #   The environment for the block which should
    #   be merged with ENV
    #
    # @param [Hash] options
    #   Options for environment manipulation
    #
    # @option options [True,False] :clear
    #   Should the environment clear before merge? 
    #
    # @yield Block which should be executed
    def environment(env={},options={},&block)
      previous_environment, environment = ENV.to_hash, env
      ENV.clear if options[:clear] == true
      ENV.update(environment)
      block.call
    ensure
      ENV.clear
      ENV.update previous_environment
    end

    # Create temporary files for testing
    # (which will be deleted when the
    # ruby process terminates)
    #
    # @param [String] base_name
    #   the path to the temporary file
    #
    # @param [String] content
    #   the content which should be written to the file
    #
    # @return [String] 
    #   the path to the temporary file
    def create_temp_file_with(base_name, content)
      file = Tempfile.new(base_name)
      file.write(content)
      file.close
      file.path
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
command_exec-0.2.0	lib/command_exec/spec_helper_module.rb