Question

I’d like to modify cake test so that it operates with a different value for *stack-trace-depth*.

The built-in definition is simply:

(deftask test #{compile}
  "Run project tests."
  "Specify which tests to run as arguments like: namespace, namespace/function, or :tag"
  (run-project-tests))

Ideally I’d like to specify the value with the command-line argument --depth=n, something to this effect:

(binding [*stack-trace-depth* (if (*opts* :depth)
                                  (read-string (*opts* :depth)))]
         (run-project-tests))

What code do I need to make this work?

---

Based on responses: Putting the following in tasks.clj

(undeftask test)
(deftask test #{compile}
  (.bindRoot #'*stack-trace-depth* 5)
  (println "Defining task: *stack-trace-depth* is" *stack-trace-depth* "in" (Thread/currentThread))
  (run-project-tests))

produces the following output:

Loading test/cake_test/core.clj:

  Loading tests: *stack-trace-depth* is nil in #<Thread[thread-13,5,main]>

$ cake test

  Defining task: *stack-trace-depth* is 5 in #<Thread[Thread-18,5,main]>
  In test: *stack-trace-depth* is nil in #<Thread[Thread-16,5,main]>

  Testing cake-testing.core

  FAIL in (test-stack-trace-depth) (core.clj:8)
  expected: (= *stack-trace-depth* 5)     
  actual: (not (= nil 5))

  Ran 1 tests containing 1 assertions.
  1 failures, 0 errors.
  ----
  Finished in 0.011865 seconds.

(Tested code is on Gist.)

Answer 1

(Update: threw out the original answer, here’s what seems to be a working solution.)

I took the sample project from your Gist and made the following changes:

1. rm tasks.clj

2. Added the following code to project.clj below the defproject form:

   (use '[bake.find-namespaces :only [find-namespaces-in-dir]]
        '[cake.tasks.test :only [test-opts]])
   
   
   (undeftask test)
   (deftask test #{compile}
     (bake (:use bake.test
                 [bake.core :only [with-context]]
                 [clojure.test :only [*stack-trace-depth*]])
       [namespaces (find-namespaces-in-dir (java.io.File. "test"))
        opts       (test-opts)]
       (with-context :test
         (binding [*stack-trace-depth* 5]
           (run-project-tests namespaces opts)))))
   

3. Created a new file, test/cake_testing/core_test.clj with the following contents:

   (ns cake-testing.core-test
     (:use clojure.test))
   
   
   (deftest correct-stack-trace-depth?
     (is (= *stack-trace-depth* 5)))
   

At this point, everything seems to work — cake test outputs

Testing cake-testing.core-test

Ran 1 tests containing 1 assertions.
0 failures, 0 errors.
----
Finished in 0.033200374 seconds.

Also, adding in a “test” which deliberately throws an exception results in a nice, short stack trace being printed.