96 lines
2.9 KiB
JavaScript
96 lines
2.9 KiB
JavaScript
'use strict';
|
|
|
|
/* globals window */
|
|
|
|
var test = require('tape');
|
|
var isAsyncFunction = require('../index');
|
|
var generatorFuncs = require('make-generator-function')();
|
|
var asyncFuncs = require('make-async-function').list();
|
|
var hasToStringTag = require('has-tostringtag/shams')();
|
|
|
|
var forEach = function (arr, func) {
|
|
var i;
|
|
for (i = 0; i < arr.length; ++i) {
|
|
func(arr[i], i, arr);
|
|
}
|
|
};
|
|
|
|
test('returns false for non-functions', function (t) {
|
|
var nonFuncs = [
|
|
true,
|
|
false,
|
|
null,
|
|
undefined,
|
|
{},
|
|
[],
|
|
/a/g,
|
|
'string',
|
|
42,
|
|
new Date()
|
|
];
|
|
t.plan(nonFuncs.length);
|
|
forEach(nonFuncs, function (nonFunc) {
|
|
t.notOk(isAsyncFunction(nonFunc), nonFunc + ' is not a function');
|
|
});
|
|
t.end();
|
|
});
|
|
|
|
test('returns false for non-async functions', function (t) {
|
|
var func = function () {};
|
|
t.notOk(isAsyncFunction(func), 'anonymous function is not an async function');
|
|
|
|
var namedFunc = function foo() {};
|
|
t.notOk(isAsyncFunction(namedFunc), 'named function is not an async function');
|
|
|
|
if (typeof window === 'undefined') {
|
|
t.skip('window.alert is not an async function');
|
|
} else {
|
|
t.notOk(isAsyncFunction(window.alert), 'window.alert is not an async function');
|
|
}
|
|
t.end();
|
|
});
|
|
|
|
var fakeToString = function () { return 'async function () { return "TOTALLY REAL I SWEAR!"; }'; };
|
|
|
|
test('returns false for non-async function with faked toString', function (t) {
|
|
var func = function () {};
|
|
func.toString = fakeToString;
|
|
|
|
t.notEqual(String(func), Function.prototype.toString.apply(func), 'faked toString is not real toString');
|
|
t.notOk(isAsyncFunction(func), 'anonymous function with faked toString is not an async function');
|
|
t.end();
|
|
});
|
|
|
|
test('returns false for generator functions', function (t) {
|
|
if (generatorFuncs.length > 0) {
|
|
forEach(generatorFuncs, function (generatorFunc) {
|
|
t.notOk(isAsyncFunction(generatorFunc), generatorFunc + ' is not async function');
|
|
});
|
|
} else {
|
|
t.skip('generator function is not async function - this environment does not support ES6 generator functions. Please use an engine that supports them.');
|
|
}
|
|
t.end();
|
|
});
|
|
|
|
test('returns false for non-async function with faked @@toStringTag', { skip: !hasToStringTag || asyncFuncs.length === 0 }, function (t) {
|
|
var asyncFunc = asyncFuncs[0];
|
|
var fakeAsyncFunction = {
|
|
toString: function () { return String(asyncFunc); },
|
|
valueOf: function () { return asyncFunc; }
|
|
};
|
|
fakeAsyncFunction[Symbol.toStringTag] = 'AsyncFunction';
|
|
t.notOk(isAsyncFunction(fakeAsyncFunction), 'fake AsyncFunction with @@toStringTag "AsyncFunction" is not an async function');
|
|
t.end();
|
|
});
|
|
|
|
test('returns true for async functions', function (t) {
|
|
if (asyncFuncs.length > 0) {
|
|
forEach(asyncFuncs, function (asyncFunc) {
|
|
t.ok(isAsyncFunction(asyncFunc), asyncFunc + ' is async function');
|
|
});
|
|
} else {
|
|
t.skip('async function is async function - this environment does not support ES2018 async functions. Please use an engine that supports them.');
|
|
}
|
|
t.end();
|
|
});
|