test-cmd.rb

About

test-cmd.rb provides an object-oriented interface for spawning a command.

Examples

Callbacks

The success and failure callbacks provide hooks for when a command exits successfully or unsuccessfully. The callbacks are passed an instance of Test::Cmd:

require "test-cmd"
cmd("ruby", "-e", "exit 0")
  .success { print "The command [#{_1.pid}] was successful", "\n" }
  .failure { print "The command [#{_1.pid}] was unsuccessful", "\n" }

Test::Unit

The following example demonstrates how tests might be written with test-unit from the standard library. The cmd method takes the name or path of a command, alongside any arguments:

require "test/unit"
require "test/cmd"

class CmdTest < Test::Unit::TestCase
  def test_ruby_stdout
    assert_equal "42\n", ruby("puts 42").stdout
  end

  def test_ruby_stderr
    assert_equal "42\n", ruby("warn 42").stderr
  end

  def test_ruby_success_exit_status
    assert_equal 0, ruby("exit 0").exit_status
  end

  def test_ruby_failure_exit_status
    assert_equal 1, ruby("exit 1").exit_status
  end

  private

  def ruby(code)
    cmd("ruby", "-e", code)
  end
end

Documentation

A complete API reference is available at 0x1eef.github.io/x/test-cmd.rb

Install

test-cmd.rb can be installed via rubygems.org:

gem install test-cmd.rb

Sources

• GitHub
• GitLab

License

BSD Zero Clause
See LICENSE