Usage

Usage

Use clojure.spec as normal. Then, at the repl or during tests:

(require '[spectrum.check :as check])

(check/check 'your.namespace)

Returns a seq of Error defrecords.

There is also

(check/type-of '(map inc (range 5)))

which is useful when you want to debug the signature of a form.

type-of can optionally also take a map of keywordized variables to spects

(check/type-of '(string? x) {:x (c/pred-spec #'string?)})
#Value[true]

(check/type-of '(string? x) {:x (c/value 3)})
#Value[false]

• if you use a predicate in a spec, i.e. (s/fdef foo :args (s/cat :x bar?)), then bar? should be spec'd, or you'll get a warning

Defrecord / instance?

If you have a predicate that is just a simple simple instance? check for a class, i.e.

(defrecord Foo ...)
(defn foo? [x] (instance? Foo x))

You'll want to add:

(:require [spectrum.ann :as ann])
(ann/ann #'foo? (ann/instance-transformer Foo))

This tells the system that expressions tagged w/ spec #'foo? are of class Foo, which is useful in java interop, both for Java methods that take Foo, and the defrecord constructors: (->Foo and map->Foo).