It would be fun to use core.match to have an easier time testing results 
that are hash-maps of different patterns. I'm just having a difficult time 
to get failing cases' input values show up in test results:

(use 'clojure.test)
(require '[clojure.core.match :refer [match]])


(defmacro matches [value pattern]
  `(match ~value
     ~pattern true
     :else false))

(let [a {:x 2}]
  (is (= a {:y 3})))
; => FAIL
; => expected: (= a {:y 3})
; => actual: (not (= {:x 2} {:y 3}))

(let [a {:x 2}]
  (is (matches a {:y _})))  
; => FAIL
; => expected: (matches a {:y _})
; => actual: false


What I would like is have more around
; => actual: (not (matches {:x 2} {:y _}))
if possible

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