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- var test = require('tape')
- var isFunction = require('./index.js')
- test('isFunction', function (t) {
- t.ok(!isFunction(), 'undefined is not a function')
- t.ok(!isFunction(null), 'null is not a function')
- t.ok(!isFunction(''), 'string is not a function')
- t.ok(!isFunction(/a/), 'regex is not a function')
- t.ok(!isFunction(true), 'true is not a function')
- t.ok(!isFunction(false), 'false is not a function')
- t.ok(!isFunction(NaN), 'NaN is not a function')
- t.ok(!isFunction(42), '42 is not a function')
- t.ok(isFunction(function () {}), 'function is a function')
- t.ok(isFunction(setTimeout), 'setTimeout is a function')
- t.end()
- })
- if (typeof window !== 'undefined') {
- test('browser quirks', function (t) {
- t.plan(2)
-
- t.ok(isFunction(window.alert), 'alert is a function')
- window.testRegExpFromIframe = function (regexp) {
- t.ok(!isFunction(regexp))
- }
-
- var iframe = document.createElement('iframe')
- document.body.appendChild(iframe)
-
- iframe.contentWindow.document.write([
- "<html><body><script type=\"text/javascript\">",
- "parent.testRegExpFromIframe(/a/)",
- "</script></body></html>"
- ].join("\n"));
- })
- }
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