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POClojure Midje 'provided' When Using 'pcalls'
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copied!<p>I'm reasonably new to Clojure, and am trying to parallelize some calls to a function.</p> <p>Let's say I have a map as follows:</p> <pre><code>{:a 1 :b 2 :c 3} </code></pre> <p>and I want to use the keys and values as arguments of a function called my-function, with the function called for each key/value pair. I could use <code>doseq</code> as below:</p> <pre><code>(doseq [entry my-map] (my-function (key entry) (val entry))) </code></pre> <p>I then decide I want the calls to my-function to be in parallel (in my actual situation my-function will be making rest calls which are independent from each other, and so I want to do them in parallel). I came up with the following:</p> <pre><code>(apply pcalls (map #(partial my-function (key %) (val %)) my-map)) </code></pre> <p>This seems to work as I expect (please correct me if I'm wrong or if there's a better way). The trouble I'm having now is getting my Midje tests to pass. They pass correctly if I use the <code>doseq</code> version above. In my tests, I am using (provided .... ) to ensure that the correct calls are made, and I wish to use this to check the calls to my-function. Is it possible to do this? I'm finding it hard to find much information on pcalls.</p> <p>Thanks</p> <p>--------- Edit ---------</p> <p>I have contrived an example that demonstrates the failue.</p> <p>The implementation can be found <a href="https://gist.github.com/anonymous/2c9214af3bb49d44495d" rel="nofollow">here</a>, and the tests <a href="https://gist.github.com/anonymous/8dcf82068f5691b71309" rel="nofollow">here</a>. I have found that a single test runs fine, but multiple tests cause the following:</p> <blockquote> <p>FAIL at (pcalls_unit.clj:29) These calls were not made the right number of times: (my-func 2 2) [expected at least once, actually never called]</p> <p>FAIL "Test some pcalls 3" at (pcalls_unit.clj:26) Expected: nil Actual: java.util.concurrent.ExecutionException: java.lang.Error: You seem to have created a prerequisite for pcalls-test.pcalls/my-func that interferes with that function's use in Midje's own code. To fix, define a function of your own that uses my-func, then describe that function in a provided clause.</p> </blockquote>

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