test-cmd.rb provides an object-oriented interface for spawning a command.
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" }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
endA complete API reference is available at 0x1eef.github.io/x/test-cmd.rb
test-cmd.rb can be installed via rubygems.org:
gem install test-cmd.rb
