Controlling when hooks are executed
Both before and after accept an argument, which can be :suite, :context, or :example. The default value is :example, so when we defined the before block in our tests above, we were actually defining a before(:example) block. Similarly, our after block was actually an after(:example) block. This means that the block is executed before (or after) each test case in the context where it is defined. This is most often the desired behavior for hooks. However, there are cases when setup and teardown are not required after each test. Usually, to improve performance, in those cases you can set the hook to run before the context where it is defined, or before the entire test suite.
There is also an around block (which ...
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