Ruby测试：在测试用例中打印

Question

我是Ruby测试的新手，Google没有帮助。

使用Test / Unit，如何打印实例变量，如

test "thing to happen" do
  do_stuff
  assert_equal "foo", @variable
  p @varible
end

Answer 1

Ruby asserts可以输出消息来测试跑步者控制台：

test "thing to happen" do
  do_stuff
  assert_equal "foo", @variable, "@variable is #{@variable} when: things to happen"
  p @varible
end