Instrumenting fixture.

instrument-fixture-fn.clj

(defn instrument-fixture-fn
  "Returns a function to be used as a clojure.test fixture. The fixture will
  instrument the vars named by sym-or-syms, a symbol or collection of symbols,
  or all instrumentable vars if the sym-or-syms is not specified. Any
  previously instrumented vars will be unstrumented before the test run and
  re-instrumented afterwards. Takes the same arguments as
  `clojure.spec.test.alpha/instrument`."
  ([] (instrument-fixture-fn (stest/instrumentable-syms)))
  ([sym-or-syms] (instrument-fixture-fn sym-or-syms {}))
  ([sym-or-syms opts]
   (fn [f]
     (let [unstrumented (stest/unstrument)]
       (stest/instrument sym-or-syms opts)
       (f)
       (stest/unstrument sym-or-syms)
       (stest/instrument unstrumented)))))