ruby 迷你测试 : Suite- or Class- level setup?

Question

使用内置的 Ruby Minitest 框架，有没有办法在整个套件运行之前运行一些代码，甚至在整个 TestClass 运行之前运行一次？我在 this question 的答案中看到Test::Unit::after_tests 可用于在运行所有测试后运行代码；是否有类似的方法在所有测试运行之前运行代码？

我想使用此功能在测试运行前初始化测试数据库，并在测试全部运行后将其拆除。

谢谢!

Answer 1

这是从 MiniTest 修改而来的 docs (在可自定义的测试运行器类型下)。

class Burger
  def initialize
    puts "YOU CREATED A BURGER"
  end

  def has_cheese?
    true
  end

  def has_pickle?
    false
  end
end

gem 'minitest'

require 'minitest/unit'
MiniTest::Unit.autorun

class MyMiniTest
  class Unit < MiniTest::Unit

    def before_suites
      # code to run before the first test
      p "Before everything"
    end

    def after_suites
      # code to run after the last test
      p "After everything"
    end

    def _run_suites(suites, type)
      begin
        before_suites
        super(suites, type)
      ensure
        after_suites
      end
    end

    def _run_suite(suite, type)
      begin
        suite.before_suite if suite.respond_to?(:before_suite)
        super(suite, type)
      ensure
        suite.after_suite if suite.respond_to?(:after_suite)
      end
    end

  end
end

MiniTest::Unit.runner = MyMiniTest::Unit.new

class BurgerTest < MiniTest::Unit::TestCase

  def self.before_suite
    p "hi"
  end

  def self.after_suite
    p "bye"
  end

  def setup
    @burger = Burger.new
  end

  def test_has_cheese
    assert_equal true, @burger.has_cheese?
  end

  def test_has_pickle
    assert_equal false, @burger.has_pickle?
  end

end

请注意，我包含了 gem 'minitest' 以使用 gem 而不是没有 MiniTest::Unit.runner 方法的捆绑版本。这是输出。

Run options: --seed 49053

# Running tests:

"Before everything"
"hi"
YOU CREATED A BURGER
.YOU CREATED A BURGER
."bye"
"After everything"


Finished tests in 0.000662s, 3021.1480 tests/s, 3021.1480 assertions/s.

2 tests, 2 assertions, 0 failures, 0 errors, 0 skips

所以它调用 #setup 两次，但是 .before_suite 和 .after_suite 只调用一次，我想这就是你要找的。