Fixing clojurescript.test failing with "ReferenceError: Can't find variable: cemerick"

ClojureScript.test (0.3.0; cemerick.cljs.test) may fail with this confusing exception:

ReferenceError: Can't find variable: cemerick

due to couple of reasons:
  1. Your test namespaces do not require cemerick.cljs.test (and thus it is missing from the compiled .js; requiring macros is not enough)
  2. cljsbuild has not included any of your test files (due to wrong setup etc.; this is essentially another form of #1)
  3. You are trying to test with the node runner but have built with :optimizations :none or :whitespace (for node you need to concatenate everything into a single file, which only happens if you use :simple or :advanced optimizations)
There is a pull request to provide a better error message but until then you have to be aware of these problems.

Example failures from all the runners:

Successfully compiled "target/cljs/testable.js" in 18.207 seconds.
Running ClojureScript test: rhino
js: "/var/folders/k0/2842tm752zv1dh4q77_gmgdr0000gn/T/rhino-runner8958189739208289289.js", line 50: uncaught JavaScript runtime exception: ReferenceError: "cemerick" is not defined.
	at /var/folders/k0/2842tm752zv1dh4q77_gmgdr0000gn/T/rhino-runner8958189739208289289.js:50

Running ClojureScript test: node

/private/var/folders/k0/2842tm752zv1dh4q77_gmgdr0000gn/T/node-runner9185102801545573161.js:26 cemerick.cljs.test.set_print_fn_BANG_(function(x) { ^ ReferenceError: cemerick is not defined at Object.<anonymous> (/private/var/folders/k0/2842tm752zv1dh4q77_gmgdr0000gn/T/node-runner9185102801545573161.js:26:1) at Module._compile (module.js:456:26) at Object.Module._extensions..js (module.js:474:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Function.Module.runMain (module.js:497:10) at startup (node.js:119:16) at node.js:901:3 Subprocess failed Running ClojureScript test: phantom ReferenceError: Can't find variable: cemerick

phantomjs://webpage.evaluate():2 phantomjs://webpage.evaluate():5 phantomjs://webpage.evaluate():5 ReferenceError: Can't find variable: cemerick

phantomjs://webpage.evaluate():2 phantomjs://webpage.evaluate():8 phantomjs://webpage.evaluate():8 # phantomjs freezes here

Tags: testing ClojureScript

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