Diffusion Ant (slabs) Code

ant/examples/spec/functions.js
327d21970a03slabs

functions.js
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			import { test, summary } from './helpers.js';

			console.log('Function Tests\n');

			function add(a, b) {
			return a + b;
			}
			test('function declaration', add(2, 3), 5);

			const multiply = function(a, b) {
			return a * b;
			};
			test('function expression', multiply(3, 4), 12);

			const arrow = (a, b) => a - b;
			test('arrow function', arrow(10, 3), 7);

			const arrowSingle = x => x * 2;
			test('arrow single param', arrowSingle(5), 10);

			const arrowBlock = (a, b) => {
			const sum = a + b;
			return sum * 2;
			};
			test('arrow block body', arrowBlock(2, 3), 10);

			function defaultParam(a, b = 10) {
			return a + b;
			}
			test('default param used', defaultParam(5), 15);
			test('default param overridden', defaultParam(5, 3), 8);

			function restParams(first, ...rest) {
			return first + rest.length;
			}
			test('rest params', restParams(1, 2, 3, 4), 4);

			function spreadCall(a, b, c) {
			return a + b + c;
			}
			test('spread in call', spreadCall(...[1, 2, 3]), 6);

			const obj = {
			value: 100,
			getValue() {
			return this.value;
			}
			};
			test('method this', obj.getValue(), 100);

			const arrowThis = {
			value: 50,
			getArrow() {
			return (() => this.value)();
			}
			};
			test('arrow this binding', arrowThis.getArrow(), 50);

			function outer() {
			let x = 10;
			return function inner() {
			return x;
			};
			}
			test('closure', outer()(), 10);

			const counter = (() => {
			let count = 0;
			return {
			inc() { return ++count; },
			get() { return count; }
			};
			})();
			test('iife closure inc', counter.inc(), 1);
			test('iife closure get', counter.get(), 1);

			function factorial(n) {
			if (n <= 1) return 1;
			return n * factorial(n - 1);
			}
			test('recursion', factorial(5), 120);

			test('function name', add.name, 'add');
			test('function length', add.length, 2);

			function bindTest(greeting) {
			return greeting + ' ' + this.name;
			}
			const boundFn = bindTest.bind({ name: 'World' });
			test('bind', boundFn('Hello'), 'Hello World');

			test('call', bindTest.call({ name: 'Call' }, 'Hi'), 'Hi Call');
			test('apply', bindTest.apply({ name: 'Apply' }, ['Hey']), 'Hey Apply');

			const gen = (function() {
			const fns = [];
			for (let i = 0; i < 3; i++) {
			fns.push(() => i);
			}
			return fns;
			})();
			test('closure in loop 0', gen[0](), 0);
			test('closure in loop 1', gen[1](), 1);
			test('closure in loop 2', gen[2](), 2);

			summary();

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