Integration test case recorder

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Extracted from #77

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22th Morning Tsoding has shown that I know nothing about functions in Emacs Lisp and their relationships with lexical scoping. :) So, I think I have to read something about that before the next stream.

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Ok, on the stream I wanted to implement higher order functions that take another functions and instrument them to enable action recording. I think this is what I should have read before that :) http://www.gnu.org/software/emacs/manual/html_node/elisp/Closures.html

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The most interesting part for me:

When lexical binding is enabled, any named function that you create (e.g., with defun), as well as any anonymous function that you create using the lambda macro or the function special form or the #' syntax (see Anonymous Functions), is automatically converted into a closure.

So looks like there are three things that we have to distinguish:

• function special form
• lambda macro
• #' syntax

Anonymous Functions: http://www.gnu.org/software/emacs/manual/html_node/elisp/Anonymous-Functions.html

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Anyway, I think we have to enable lexical binding for all the modules.