如何断言某些方法是用Ruby minitest框架调用的?

问题描述

我想测试一个函数是否使用minitest Ruby正确调用了其他函数，但是我找不到一个合适的assert可以从.

I want to test whether a function invokes other functions properly with minitest Ruby, but I cannot find a proper assert to test from the doc.

class SomeClass
  def invoke_function(name)
    name == "right" ? right () : wrong ()
  end

  def right
    #...
  end

  def wrong
    #...
  end
end

测试代码:

describe SomeClass do
  it "should invoke right function" do
    # assert right() is called
  end

  it "should invoke other function" do
    # assert wrong() is called
  end
end

推荐答案

使用minitest，您可以使用expect方法设置对像这样的模拟对象上调用的方法的期望

With minitest you use expect method to set the expectation for a method to be called on a mock object like so

obj = MiniTest::Mock.new
obj.expect :right

如果要使用参数设置期望值并返回值，则:

If you want to set expectation with parameters and return values then:

obj.expect :right, return_value, parameters

对于这样的具体对象:

obj = SomeClass.new
assert_send([obj, :right, *parameters])

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