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✍️ Editing: test.js

            File: /usr/lib/node_modules/npm/node_modules/is-callable/test.js

            Size: 5.41 KB | 
            Last Modified: 2021-03-10 21:36:36        

'use strict';

/* eslint no-magic-numbers: 1 */

var classConstructor = invokeFunction('"use strict"; return class Foo {}');

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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