Run tests from Clojure Repl and Leiningen

Question

As a newbie to clojure, I have used leiningen to create a sample project with

lein new app first-project

which gave me this directory

Answer 1

In your example above the repl is in the wrong namespace. It may work better if you switch the repl to the core_test namespace. and then run (run-tests).

(in-ns 'first-project.core-test)
(run-tests)

Another fun way of developing tests is to just run them from the REPL until they work, because tests are normal functions with some extra metadata.

(in-ns 'first-project.core-test)
(my-test)

Remember you have to load the file in addition to calling in-ns Let's say your test file is tests/first_project/core_test.clj, then you will need to call

(load "tests/first_project/core_test")
(in-ns 'first-project.core-test)
(my-test)

Keep in mind that _ in the file system becomes - in the namespace and / becomes ..