我有一个以这种方式构建的测试套件：
let(:cat) { create :blue_russian_cat }
subject { cat }
context "empty bowl" do
let!(:bowl) { create(:big_bowl,amount: 0) }
before { meow }
# a ton of `its` or `it` which require `meow` to be executed before making assertion
its(:status) { should == :annoyed }
its(:tail) { should == :straight }
# ...
# here I want to expect that number of PetFishes is going down after `meow`,like that
it "will eat some pet fishes" do
expect {???}.to change(PetFish,:count).by(-1)
end
end
通常我只是把这个块放在上下文调用期望之下：
it "will eat some pet fishes" do
expect { meow }.to change(PetFish,:count).by(-1)
end
解决方法
您是否会考虑更改两个测试以期望语法在相同的上下文中获取它们？也许是这样的：
let(:cat) { create :blue_russian_cat }
context "empty bowl" do
let!(:bowl) { create(:big_bowl,amount: 0) }
let(:meowing) { -> { meow } } # not sure what meow is,so may not need lambda
it "will annoy the cat" do
expect(meowing).to change(cat.status).from(:placid).to(:annoyed)
end
# here I want to expect that number of PetFishes is going down after `meow`
it "will eat some pet fishes" do
expect(meowing).to change(PetFish,:count).by(-1)
end
end