--- /dev/null
+var test = require('tap').test
+var wrappy = require('../wrappy.js')
+
+test('basic', function (t) {
+ function onceifier (cb) {
+ var called = false
+ return function () {
+ if (called) return
+ called = true
+ return cb.apply(this, arguments)
+ }
+ }
+ onceifier.iAmOnce = {}
+ var once = wrappy(onceifier)
+ t.equal(once.iAmOnce, onceifier.iAmOnce)
+
+ var called = 0
+ function boo () {
+ t.equal(called, 0)
+ called++
+ }
+ // has some rando property
+ boo.iAmBoo = true
+
+ var onlyPrintOnce = once(boo)
+
+ onlyPrintOnce() // prints 'boo'
+ onlyPrintOnce() // does nothing
+ t.equal(called, 1)
+
+ // random property is retained!
+ t.equal(onlyPrintOnce.iAmBoo, true)
+
+ var logs = []
+ var logwrap = wrappy(function (msg, cb) {
+ logs.push(msg + ' wrapping cb')
+ return function () {
+ logs.push(msg + ' before cb')
+ var ret = cb.apply(this, arguments)
+ logs.push(msg + ' after cb')
+ }
+ })
+
+ var c = logwrap('foo', function () {
+ t.same(logs, [ 'foo wrapping cb', 'foo before cb' ])
+ })
+ c()
+ t.same(logs, [ 'foo wrapping cb', 'foo before cb', 'foo after cb' ])
+
+ t.end()
+})