| 'use strict'; |
| |
| /* globals window */ |
| |
| var test = require('tape'); |
| var isGeneratorFunction = require('../index'); |
| var generatorFunc = require('make-generator-function'); |
| var hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol'; |
| |
| 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(isGeneratorFunction(nonFunc), nonFunc + ' is not a function'); |
| }); |
| t.end(); |
| }); |
| |
| test('returns false for non-generator functions', function (t) { |
| var func = function () {}; |
| t.notOk(isGeneratorFunction(func), 'anonymous function is not an generator function'); |
| |
| var namedFunc = function foo() {}; |
| t.notOk(isGeneratorFunction(namedFunc), 'named function is not an generator function'); |
| |
| if (typeof window === 'undefined') { |
| t.skip('window.alert is not an generator function'); |
| } else { |
| t.notOk(isGeneratorFunction(window.alert), 'window.alert is not an generator function'); |
| } |
| t.end(); |
| }); |
| |
| test('returns false for non-generator function with faked toString', function (t) { |
| var func = function () {}; |
| func.toString = function () { return 'function* () { return "TOTALLY REAL I SWEAR!"; }'; }; |
| |
| t.notEqual(String(func), Function.prototype.toString.apply(func), 'faked toString is not real toString'); |
| t.notOk(isGeneratorFunction(func), 'anonymous function with faked toString is not a generator function'); |
| t.end(); |
| }); |
| |
| test('returns false for non-generator function with faked @@toStringTag', { skip: !hasToStringTag }, function (t) { |
| var fakeGenFunction = { |
| toString: function () { return String(generatorFunc); }, |
| valueOf: function () { return generatorFunc; } |
| }; |
| fakeGenFunction[Symbol.toStringTag] = 'GeneratorFunction'; |
| t.notOk(isGeneratorFunction(fakeGenFunction), 'fake GeneratorFunction with @@toStringTag "GeneratorFunction" is not a generator function'); |
| t.end(); |
| }); |
| |
| test('returns true for generator functions', function (t) { |
| if (generatorFunc) { |
| t.ok(isGeneratorFunction(generatorFunc), 'generator function is generator function'); |
| } else { |
| t.skip('generator function is generator function - this environment does not support ES6 generator functions. Please run `node --harmony`, or use a supporting browser.'); |
| } |
| t.end(); |
| }); |
| |
| test('concise methods', { skip: !generatorFunc || !generatorFunc.concise }, function (t) { |
| t.test('returns true for concise generator methods', function (st) { |
| st.ok(isGeneratorFunction(generatorFunc.concise), 'concise generator method is generator function'); |
| st.end(); |
| }); |
| |
| t.test('returns false for concise non-generator methods', function (st) { |
| var conciseMethod = Function('return { concise() {} }.concise;')(); |
| st.equal(typeof conciseMethod, 'function', 'assert: concise method exists'); |
| st.notOk(isGeneratorFunction(conciseMethod), 'concise non-generator method is not generator function'); |
| st.end(); |
| }); |
| |
| t.end(); |
| }); |