/
api.clj
109 lines (95 loc) · 2.73 KB
/
api.clj
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(ns vvvvalvalval.supdate.test.api
(:require [midje.sweet :refer :all]
[clojure.test :as test :refer :all]
[vvvvalvalval.supdate.api :as supd :refer [supdate]])
(:use clojure.repl))
(fact "nominal example"
(supdate
{:a 1 "b" [{:c 2} {:c 3 :d 4}]} ;; the data structure to transform
{:a inc "b" [{:c dec :d false}] :missing inc} ;; the transformation
)
=> {:a 2, "b" [{:c 1} {:c 2}]}
(fact "comparing various execution strategies"
(=
(supdate
{:a 1 "b" [{:c 2} {:c 3 :d 4}]}
{:a inc "b" [{:c dec :d false}] :missing inc})
(let [t {:a inc "b" [{:c dec :d false}] :missing inc}]
(supdate
{:a 1 "b" [{:c 2} {:c 3 :d 4}]}
t))
(supd/supdate*
{:a 1 "b" [{:c 2} {:c 3 :d 4}]}
{:a inc "b" [{:c dec :d false}] :missing inc})
((supd/compile {:a inc "b" [{:c dec :d false}] :missing inc})
{:a 1 "b" [{:c 2} {:c 3 :d 4}]})
) => true)
)
(fact "if transform is a function: apply it to the value"
(supdate 0 inc) => 1
(supdate 0 (fn [v] (inc v))) => 1
(fact "a type hint can be provided for efficiency."
(supdate 0 ^{::supd/type :fn} inc) => 1)
)
(fact "if transform is a map: recursively transform the value for the given keys."
(supdate
{:a 1 "b" 1 1 1}
{:a inc "b" inc 1 inc})
=> {:a 2 "b" 2 1 2}
(let [t {:a inc "b" inc 1 inc}]
(supdate
{:a 1 "b" 1 1 1}
t)
=> {:a 2 "b" 2 1 2})
(fact "if a key is missing, no transform is applied"
(supdate {:a 1} {:a inc :b dec}) => {:a 2}
(supdate {} {:a inc}) => {}
(supdate nil {:a inc}) => nil
)
(fact "If a value for a key in `transform` is false, then the key is dissoc'ed form the input."
(supdate {:a 1} {:a false}) => {}
(supdate nil {:a false}) => nil
(supdate {:a 1} {:b false}) => {:a 1})
)
(fact "if it's a vector with one (transform) element: transform each item in the collection."
(supdate [1 2 3 4] [inc])
=> [2 3 4 5]
(let [t [inc]]
(supdate [1 2 3 4] [inc]))
=> [2 3 4 5]
(supdate (list 1 2 3 4) [inc])
=> '(2 3 4 5)
(supdate [] [inc]) => []
(supdate () [inc]) => ()
)
;; you can nest transforms arbitrarily.
(fact "Transforms can be nested"
(supdate
{:a {:b [{:c 1}]}}
{:a {:b [{:c inc}]}})
=> {:a {:b [{:c 2}]}})
(fact
"a vector with 2 or more elements means 'chain the transforms'"
(supdate 0 [inc inc inc])
=> 3
(supdate 0 [])
=> 0
)
(require '[vvvvalvalval.supdate.api :as supd :refer [supdate]])
(def my-data
{:a 1
:b [1 2 3]
:c {"d" [{:e 1 :f 1} {:e 2 :f 2}]}
:g 0
:h 0})
(supdate
my-data
{:a inc
:b [inc]
:c {"d" [{:e inc}]}
:g [inc inc inc]})
=> {:a 2,
:b [2 3 4],
:c {"d" [{:e 2, :f 1} {:e 3, :f 2}]}
:g 3,
:h 0}