Question

在rspec（1.2.9）中，指定对象每次都会接收多次调用方法的正确方法是什么？

我问因为这个令人困惑的结果：

describe Object do

  it "passes, as expected" do
    foo = mock('foo')
    foo.should_receive(:bar).once.ordered.with(1)
    foo.should_receive(:bar).once.ordered.with(2)
    foo.bar(1)
    foo.bar(2)
  end

  it "fails, as expected" do
    foo = mock('foo')
    foo.should_receive(:bar).once.ordered.with(1) # => Mock "foo" expected :bar with (1) once, but received it twice
    foo.should_receive(:bar).once.ordered.with(2)
    foo.bar(1)
    foo.bar(1)
    foo.bar(2)
  end

  it "fails, as expected" do
    foo = mock('foo')
    foo.should_receive(:bar).once.ordered.with(1)
    foo.should_receive(:bar).once.ordered.with(2)
    foo.bar(2) # => Mock "foo" received :bar out of order
    foo.bar(1)
  end

  it "fails, as expected, but with an unexpected message" do
    foo = mock('foo')
    foo.should_receive(:bar).once.ordered.with(1)
    foo.should_receive(:bar).once.ordered.with(2)
    foo.bar(1)
    foo.bar(999) # => Mock "foo" received :bar with unexpected arguments
                 # =>   expected: (1)
                 # =>         got (999)
  end

end

我预计最后一条失败消息是“预期的：（2）”，而不是“预期的（1）”。我是否错误地使用了rspec？

Answer 1

与此question相似。建议的解决方案是调用as_null_object以避免混淆消息。所以：

describe Object do
  it "fails, as expected, (using null object)" do
    foo = mock('foo').as_null_object
    foo.should_receive(:bar).once.ordered.with(1)
    foo.should_receive(:bar).once.ordered.with(2)
    foo.bar(1)
    foo.bar(999) # => Mock "foo" expected :bar with (2) once, but received it 0 times
  end
end

输出与第二种情况不同（即“预期2但得到999”），但确实显示未达到预期。

RSpec：每次指定对具有不同参数的方法的多次调用

1 个答案: