Hello, interesting. Is this a bug??
Somehow the println seems to do strange things here.
If I evaluate in namespace user
(do
(ns ns-1)
(def my-namespace *ns*)
my-namespace)
The REPL switches to the namespace ns-1 and the var my-namespace is in
ns-1
If I evaluate in namespace user
(println (do
(ns ns-1)
(def my-namespace *ns*)
my-namespace))
The REPL switches to the namespace ns-1 and the var my-namespace is in
user !
That seems to be the background of Davids irritation.
Any explanations?
Kind regards, alux
On 28 Apr., 17:37, Nate Young <youn...@gmail.com> wrote:
> On Apr 26, 5:25 pm, David McNeil <mcneil.da...@gmail.com> wrote:> I am
> experimenting with clojure.test and I encountered the following
> > situation which I cannot explain.
>
> > This code:
>
> > (println (do
> > (ns ns01
> > (:use clojure.test))
> > (deftest test1 nil)
> > (run-tests)))
>
> > Produces the expected result (note: it runs one test):
>
> This is actually NOT what I'm seeing. At least when I run it, it
> appears to run exactly zero tests.
>
> > [snip]
>
> > (println (let []
> > (do
> > (ns ns02
> > (:use clojure.test))
> > (deftest test1 nil)
> > (run-tests))))
>
> > Then I get the unexpected result that no tests are executed:
>
> The let here is, I believe a red herring. Again, with what I'm
> seeing, this form executes the same way as the above and runs exactly
> zero tests.
>
> > Seems there is something going on with namespaces that I do not
> > understand and I hope that somewhere here can explain it.
>
> I think I can explain the above behavior and suggest a way to obtain
> the behavior you want.
> I don't think it has as much to do with namespaces as it does with the
> evaluation rule and it's relationship to def.
>
> You've defined a do, which will execute each of the forms in turn, but
> the deftest (a macro which expands to a def form) creates it's test
> function in the namespace that the do was executed in, not the
> namespace created and switched to just previously.
>
> In fact, if you check your namespace, you should see that test1 is
> defined not in ns01/ns02, but in user (or whichever namespace you
> executed the do from).
>
> What I can't sufficiently explain is why def doesn't see the binding
> of *ns* but run-tests obviously does, as it tries to find all tests
> defined in ns01/ns02 (of which there are none).
> (println (do
> (ns ns03
> (:use clojure.test))
> (binding [*ns* (find-ns 'ns03)]
> (deftest test3 nil))
> (run-tests)))
>
> Now, when the do evaluates the second form, it uses the namespace that
> was created by the first form.
>
> Hope this helps.
>
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