Rspec测试，关于顺序和before(:all)
如果我有如下的rspec测试：
context "main context" do
before(:all) do
# code for before :all
puts "my fore :all"
end
describe "Scenario-1" do
context "my context 1" do
it "should blablabla" do
end
it "should blablabla" do
end
end
context "my context 2" do
it "should blablabla" do
end
it "should blablabla" do
end
end
end # end of describe "Scenario-1"
describe "Scenario-2"
context "my context 3" do
it "should blablabla" do
end
it "should blablabla" do
end
end
end #end of "Scenario-2"
end #end of main context
要问两个问题：
1.是否这样before(:all)< /code> 声明实际上在每个子上下文中被调用？我以为它在整个测试过程中只调用一次，但是当我运行测试时，我经历的是 before(:all) 中的代码 get在每个 上下文中执行，那就是每个上下文启动时都会运行，为什么？
（正如您所注意到的，我的 before(:all) 代码中有“puts”，并且在运行test，为什么？ before(:all) 不应该在整个测试期间只执行一次？？）
2. 当我运行测试时，为什么测试运行的顺序是从底部上下文到顶部上下文（在每个上下文中，“it”的顺序是从上到下）？那么如何在上下文级别更改测试顺序呢？
If I have rspec test like following:
context "main context" do
before(:all) do
# code for before :all
puts "my fore :all"
end
describe "Scenario-1" do
context "my context 1" do
it "should blablabla" do
end
it "should blablabla" do
end
end
context "my context 2" do
it "should blablabla" do
end
it "should blablabla" do
end
end
end # end of describe "Scenario-1"
describe "Scenario-2"
context "my context 3" do
it "should blablabla" do
end
it "should blablabla" do
end
end
end #end of "Scenario-2"
end #end of main context
Two questions to ask:
1. Is it so that the before(:all) declare actually get called in each sub context ? I thought it is only called once during the whole test, but when I run my test, What I experienced is that the code in before(:all) get executed in each context, that's it get run when each context started, why?
(As you noticed I have "puts" as part of my before(:all) code, and I saw this puts in each sub-context when run the test, why? isn't before(:all) should only be executed once during the whole test??)
2. When I run my test, Why the order of the test running is from bottom context to up context (while inside each context, the order of "it" is up-down)? How to change the test order on context level then?
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1） before(:all) 应该只运行一次...但是有一个已知的问题，它完全按照您指出的方式进行。这里讨论：
http://rubyforge.org/pipermail/rspec-users/2010-September/018
2) 测试必须彼此独立运行。以确保您没有做出任何假设。因此，测试套件通常以随机或相反的顺序运行测试 - 以确保您不会这样做。
1) before(:all) should be running only once... but there is a known isue about it doing exactly what you've pointed out. Discussed here:
http://rubyforge.org/pipermail/rspec-users/2010-September/018
2) tests must run independently of one another. to ensure that you aren't making any assumptions. Thus testing suites often run the tests in random or reverse order - to be sure that you aren't doing that.
首先，阅读 this - 其次是页面底部的部分
，这是我最近学到的一个技巧是你可以使用
after(:all)非常简洁
Firstly, read this - especially the part at the bottom of the page
secondly, a trick I learned recently is that you can use
after(:all)Pretty neat