如何在模块中存根方法：
module SomeModule
def method_one
# do stuff
something = method_two(some_arg)
# so more stuff
end
def method_two(arg)
# do stuff
end
end
我可以隔离测试method_two.
我想通过stubbing method_two的返回值来隔离测试method_one：
shared_examples_for SomeModule do
it 'does something exciting' do
# neither of the below work
# SomeModule.should_receive(:method_two).and_return('MANUAL')
# SomeModule.stub(:method_two).and_return('MANUAL')
# expect(described_class.new.method_one).to eq(some_value)
end
end
describe SomeController do
include_examples SomeModule
end
SomeController中包含的规范失败,因为method_two抛出一个异常(它尝试做一个未被种子的数据库查找).
在method_one中调用的时候如何存根method_two？
解决方法
shared_examples_for SomeModule do
let(:instance) { described_class.new }
it 'does something exciting' do
instance.should_receive(:method_two).and_return('MANUAL')
expect(instance.method_one).to eq(some_value)
end
end
describe SomeController do
include_examples SomeModule
end