When a namespace is reloaded any vars defined in it are re-evaluated. In your case it would seem that some quirk of the Leiningen test architecture is leading to vartest.test-data being loaded twice.
In general namespaces should be robust when it comes to being reloaded. Clojure provides a macro, defonce, for variables you only want defined once across reloads. Using defonce in your test-data namespace should solve your problem. - James On 30 April 2014 07:29, Antti Karanta <antti.kara...@gmail.com> wrote: > > > I thought that once defined clojure vars are immutable and retain their > values. However, I > accidentally bumped into a situation where I observe the same var in two > different states. > Here's how to reproduce: > > lein new app vartest > > Add the following files to the test folder: > > ----- > > (ns vartest.test-data) > > (def uuid (java.util.UUID/randomUUID)) > > ----- > > (ns vartest.core-test > (:require [clojure.test :refer :all] > [vartest.test-data :as td])) > > (def my-uuid td/uuid) > > (deftest a-test > (testing "accessing same var twice" > (is (= my-uuid td/uuid)))) > > ---- > > Now run the tests: > > C:\temp\vartest>lein test :all > > lein test vartest.core-test > > lein test :only vartest.core-test/a-test > > FAIL in (a-test) (core_test.clj:9) > accessing same var twice > expected: (= my-uuid td/uuid) > actual: (not (= #uuid "030d2fe8-407b-4d67-a505-261bc3650729" #uuid > "f8405611-e2da-4dd2-973b-508831 > 27ef6a")) > > lein test vartest.test-data > > Ran 1 tests containing 1 assertions. > 1 failures, 0 errors. > Tests failed. > > However, if I run > > lein test :only vartest.core-test/a-test > > then the very same test passes. > > What's going on here? > > Environment: Clojure 1.5.1 and 1.6.0, Leiningen 2.3.4, Java 1.7.0_51 > 64-Bit, Windows 7 64-bit > > > ::Antti:: > > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
