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ant/examples/spec/getters.js
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getters.js
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			import { test, summary } from './helpers.js';

			console.log('Getter/Setter Tests\n');

			let obj1 = {
			get value() {
			return 42;
			}
			};
			test('basic getter', obj1.value, 42);

			let obj2 = {
			_count: 0,
			get count() {
			return this._count;
			},
			set count(val) {
			this._count = val;
			}
			};
			test('getter initial value', obj2.count, 0);
			obj2.count = 10;
			test('setter updates value', obj2.count, 10);

			let obj3 = {
			firstName: 'John',
			lastName: 'Doe',
			get fullName() {
			return this.firstName + ' ' + this.lastName;
			}
			};
			test('computed getter', obj3.fullName, 'John Doe');

			let obj4 = {
			get 'special-key'() {
			return 'special';
			}
			};
			test('string key getter', obj4['special-key'], 'special');

			let obj5 = {
			get 0() {
			return 'zero';
			}
			};
			test('number key getter', obj5[0], 'zero');

			let obj6 = {
			_x: 0,
			_y: 0,
			get x() {
			return this._x;
			},
			set x(v) {
			this._x = v;
			},
			get y() {
			return this._y;
			},
			set y(v) {
			this._y = v;
			}
			};
			obj6.x = 5;
			obj6.y = 10;
			test('multiple getters x', obj6.x, 5);
			test('multiple getters y', obj6.y, 10);

			let obj7 = {
			get data() {
			return { a: 1, b: 2 };
			}
			};
			test('getter returns object', obj7.data.a, 1);

			let obj8 = {
			_age: 0,
			get age() {
			return this._age;
			},
			set age(val) {
			if (val < 0) val = 0;
			this._age = val;
			}
			};
			obj8.age = -5;
			test('setter validation', obj8.age, 0);
			obj8.age = 25;
			test('setter valid value', obj8.age, 25);

			let obj9 = {
			get readonly() {
			return 'constant';
			}
			};
			test('getter-only read', obj9.readonly, 'constant');
			obj9.readonly = 'changed';
			test('getter-only unchanged', obj9.readonly, 'constant');

			let strictError = (function () {
			'use strict';
			try {
			let strictObj = {
			get x() {
			return 1;
			}
			};
			strictObj.x = 2;
			return false;
			} catch (e) {
			return e instanceof TypeError;
			}
			})();
			test('strict mode getter-only throws', strictError, true);

			let obj10 = {
			multiplier: 3,
			_value: 7,
			get computed() {
			return this._value * this.multiplier;
			}
			};
			test('getter with this', obj10.computed, 21);

			let sideEffect = 0;
			let obj11 = {
			set trigger(val) {
			sideEffect = val * 2;
			}
			};
			obj11.trigger = 5;
			test('setter side effect', sideEffect, 10);

			summary();

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