How do I get emacs cider (clojure mode) to use my test environment variables when running tests?

Question

I've set up separate database-url for development and test environments, and this works nicely when running my webapp in the REPL and from the lein test on the command line. Here's my profiles.clj:

{:profiles/dev  {:env {:database-url "wiki"}}
 :profiles/test {:env {:database-url "wiki-test"}}}

And evidence of the right database instance being hit (I'm using CouchDB):

;; Running the site from the REPL:
[info] [<0.12149.0>] 127.0.0.1 - - GET /wiki/home-page 200
[info] [<0.10353.0>] 127.0.0.1 - - GET /wiki/about 200

;; Running lein test:
[info] [<0.12026.0>] 127.0.0.1 - - GET /wiki-test/welcome 404
[error] [<0.12933.0>] Could not open file /usr/local/var/lib/couchdb/wiki-test.c

However, when I run tests via Cider in Emacs it uses the dev environment and therefore the wrong database instance.

How do I fix this?

Incompressible

Answer 1

I suggest you try using with-redefs for that.

Something like this:

(with-redefs [db (get-my-test-db)]
  (run-my-tests)

Where db is the symbol to which you bind your db handle in your tests.

This article should be helpful: Isolating External Dependencies in Clojure

Underfeed

Thanks, I think I can see how that would work, but it wouldn't use the test environment right? Maybe an alternative approach is to get Cider to use the test environment by default? – Incompressible

This worked. I put the function call with-redefs into a fixture so that it's called for every test. – Incompressible