cljs-lambda.local — io.nervous/cljs-lambda 0.3.6-SNAPSHOT

Utilities for the local (e.g. automated tests, REPL interactions) invocation of Lambda handlers. Local invocation is accomplished by passing handlers a stub context object which records completion signals.

->context cljs

(->context & [key-overrides])

Create a context object for use w/ invoke, channel. This is helpful if your want to take advantage of key-overrides to supply different context values for an invocation -- otherwise, no need to use directly.

(invoke wait {:msecs 17} (->context {:function-name "wait"}))

By default, the values for the context keys will match the key names, more or less, e.g. {:function-name "functionName"}.

channel cljs

(channel f)

(channel f event)

(channel f event {input-channel :result-channel :as ctx})

Identical semantics to invoke, though the return value is a core.async channel containing either [:succeed <result>] or [:fail <result>].

(deflambda please-repeat [[n x] ctx]
  (promesa/resolved (repeat n x)))

(invoke please-repeat [3 :x])
;; => <Channel [:succeed ["x" "x" "x"]]>

invoke cljs

(invoke f)

(invoke f event)

(invoke f event {:keys [result-channel] :as ctx})

Utility for local (test, REPL) invocation of Lambda handlers. Returns a promise resolved or rejected with the result of invoking f on the given event (nil in arity 1) and context object (defaulted in lower arities).

(deflambda add [[x y] ctx]
  (go (+ x y)))

(invoke add [-1 2])
;; => <Promise: 1>