Rspec：如何在私有方法中引发exception测试？

在私有方法中测试exception时出错。 如何在私有方法中引发exception，该方法是从公共方法调用的？

上市

def public_method private_method end 

私人的

  def private_method tries = 0 begin raise Product::StaleObjectError.new("Product is changed while you were editing") if stale_object? // Do some work raise Exception.new("Total amount used is greater than approved") if total_approved  e if tries < MAX_RETRIES tries += 1 sleep(1 + tries) reload retry else raise Product::StaleObjectError("Product is changed while you were editing") end end attributes end 

测试用例：

  before(:each) do @prod_v1 = Product.new end it 'if product stale, then an exception should raise' do Product.any_instance.stub(:stale_object?).and_return(true) expect_any_instance_of(Product).to receive(:private_method).and_raise(Product::StaleObjectError.new("Product is changed while you were editing"), nil) @prod_v1.public_method end 

测试用例我得到了以下错误

  Failure/Error: @product_v1.private_method Product::StaleObjectError: Product is changed while you were editing # ./app/models/product.rb:10:in `private_method' # ./spec/models/product_spec.rb:67:in `block (4 levels) in ' 

我尝试改变测试用例的结构，但仍然会出错。

  it 'if product stale, then an exception should raise' do Product.any_instance.stub(:stale_object?).and_return(true) expect_any_instance_of(Product).to receive(:private_method).and_raise(Product::StaleObjectError.new(nil, nil)) @prod_v1.public_method end 

错误

  Failure/Error: expect_any_instance_of(Product).to receive(:private_method).and_raise(Product::StaleObjectError.new(nil, nil)) ArgumentError: wrong number of arguments (2 for 0..1) 

Answer 1

尝试and_raise(Product::StaleObjectError.new(nil, nil))

看到这个问题我问了一会儿同样的问题：

Rspec – 引发错误时参数数量错误