spy-on is only allowed inside a buttercup-with-cleanup
environment. Ensure this by raising errors when used wrong. Some of
these errors will be signaled while reading the tests, but some (like in
before-each) will be signaled when the tests are run.
The buttercup--cleanup-functions variable gets a new default value
that does not satisfy listp. This non-list value is used to detect
when spy-on is called in an invalid context.
spy-onis only allowed inside abuttercup-with-cleanupenvironment. Ensure this by raising errors when used wrong. Some of these errors will be signaled while reading the tests, but some (like inbefore-each) will be signaled when the tests are run.The
buttercup--cleanup-functionsvariable gets a new default value that does not satisfylistp. This non-list value is used to detect whenspy-onis called in an invalid context.Fixes #122.
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