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files >> //lib/node_modules/npm/node_modules/is-callable/test.js
'use strict'; /* eslint no-magic-numbers: 1 */ var test = require('tape'); var isCallable = require('./'); var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol'; var genFn = require('make-generator-function'); var arrowFn = require('make-arrow-function')(); var weirdlyCommentedArrowFn; var asyncFn; var asyncArrowFn; try { /* eslint no-new-func: 0 */ weirdlyCommentedArrowFn = Function('return cl/*/**/=>/**/ass - 1;')(); asyncFn = Function('return async function foo() {};')(); asyncArrowFn = Function('return async () => {};')(); } catch (e) { /**/ } var forEach = require('foreach'); var noop = function () {}; var classFake = function classFake() { }; // eslint-disable-line func-name-matching var returnClass = function () { return ' class '; }; var return3 = function () { return 3; }; /* for coverage */ noop(); classFake(); returnClass(); return3(); /* end for coverage */ var invokeFunction = function invokeFunctionString(str) { var result; try { /* eslint-disable no-new-func */ var fn = Function(str); /* eslint-enable no-new-func */ result = fn(); } catch (e) {} return result; }; var classConstructor = invokeFunction('"use strict"; return class Foo {}'); var commentedClass = invokeFunction('"use strict"; return class/*kkk*/\n//blah\n Bar\n//blah\n {}'); var commentedClassOneLine = invokeFunction('"use strict"; return class/**/A{}'); var classAnonymous = invokeFunction('"use strict"; return class{}'); var classAnonymousCommentedOneLine = invokeFunction('"use strict"; return class/*/*/{}'); test('not callables', function (t) { t.test('non-number/string primitives', function (st) { st.notOk(isCallable(), 'undefined is not callable'); st.notOk(isCallable(null), 'null is not callable'); st.notOk(isCallable(false), 'false is not callable'); st.notOk(isCallable(true), 'true is not callable'); st.end(); }); t.notOk(isCallable([]), 'array is not callable'); t.notOk(isCallable({}), 'object is not callable'); t.notOk(isCallable(/a/g), 'regex literal is not callable'); t.notOk(isCallable(new RegExp('a', 'g')), 'regex object is not callable'); t.notOk(isCallable(new Date()), 'new Date() is not callable'); t.test('numbers', function (st) { st.notOk(isCallable(42), 'number is not callable'); st.notOk(isCallable(Object(42)), 'number object is not callable'); st.notOk(isCallable(NaN), 'NaN is not callable'); st.notOk(isCallable(Infinity), 'Infinity is not callable'); st.end(); }); t.test('strings', function (st) { st.notOk(isCallable('foo'), 'string primitive is not callable'); st.notOk(isCallable(Object('foo')), 'string object is not callable'); st.end(); }); t.test('non-function with function in its [[Prototype]] chain', function (st) { var Foo = function Bar() {}; Foo.prototype = noop; st.equal(true, isCallable(Foo), 'sanity check: Foo is callable'); st.equal(false, isCallable(new Foo()), 'instance of Foo is not callable'); st.end(); }); t.end(); }); test('@@toStringTag', { skip: !hasSymbols || !Symbol.toStringTag }, function (t) { var fakeFunction = { toString: function () { return String(return3); }, valueOf: return3 }; fakeFunction[Symbol.toStringTag] = 'Function'; t.equal(String(fakeFunction), String(return3)); t.equal(Number(fakeFunction), return3()); t.notOk(isCallable(fakeFunction), 'fake Function with @@toStringTag "Function" is not callable'); t.end(); }); var typedArrayNames = [ 'Int8Array', 'Uint8Array', 'Uint8ClampedArray', 'Int16Array', 'Uint16Array', 'Int32Array', 'Uint32Array', 'Float32Array', 'Float64Array' ]; test('Functions', function (t) { t.ok(isCallable(noop), 'function is callable'); t.ok(isCallable(classFake), 'function with name containing "class" is callable'); t.ok(isCallable(returnClass), 'function with string " class " is callable'); t.ok(isCallable(isCallable), 'isCallable is callable'); t.end(); }); test('Typed Arrays', function (st) { forEach(typedArrayNames, function (typedArray) { /* istanbul ignore if : covered in node 0.6 */ if (typeof global[typedArray] === 'undefined') { st.comment('# SKIP typed array "' + typedArray + '" not supported'); } else { st.ok(isCallable(global[typedArray]), typedArray + ' is callable'); } }); st.end(); }); test('Generators', { skip: !genFn }, function (t) { t.ok(isCallable(genFn), 'generator function is callable'); t.end(); }); test('Arrow functions', { skip: !arrowFn }, function (t) { t.ok(isCallable(arrowFn), 'arrow function is callable'); t.ok(isCallable(weirdlyCommentedArrowFn), 'weirdly commented arrow functions are callable'); t.end(); }); test('"Class" constructors', { skip: !classConstructor || !commentedClass || !commentedClassOneLine || !classAnonymous }, function (t) { t.notOk(isCallable(classConstructor), 'class constructors are not callable'); t.notOk(isCallable(commentedClass), 'class constructors with comments in the signature are not callable'); t.notOk(isCallable(commentedClassOneLine), 'one-line class constructors with comments in the signature are not callable'); t.notOk(isCallable(classAnonymous), 'anonymous class constructors are not callable'); t.notOk(isCallable(classAnonymousCommentedOneLine), 'anonymous one-line class constructors with comments in the signature are not callable'); t.end(); }); test('`async function`s', { skip: !asyncFn }, function (t) { t.ok(isCallable(asyncFn), '`async function`s are callable'); t.ok(isCallable(asyncArrowFn), '`async` arrow functions are callable'); t.end(); });
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