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macro.test.ts
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macro.test.ts
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import macro from '../src/macro';
import { makeDummyClass, makeDummyObject } from './__Fixtures/objects';
const props = {
// default: ['length', 'prototype', 'name'],
static: ['length', 'prototype', 'hi', 'name'],
instance: ['hey', 'state'],
// macro: ['__macros__'],
// macroed: ['hello'],
fullStatic: ['length', 'prototype', 'hi', 'name', 'hello', '__macros__'],
onPrototypeBefore: ['constructor', 'ooh', 'level', 'yeah'],
onPrototypeAfter: ['constructor', 'ooh', 'level', 'yeah', 'hello', '__macros__'],
};
describe('macro', () => {
it("can add a macro to a class/function's prototype by default", () => {
const Dummy = makeDummyClass();
expect('__macros__' in Dummy).toEqual(false);
expect('__macros__' in Dummy.prototype).toEqual(false);
expect('__macros__' in new Dummy()).toEqual(false);
expect('hello' in Dummy).toEqual(false);
expect('hello' in Dummy.prototype).toEqual(false);
expect('hello' in new Dummy()).toEqual(false);
expect(Object.getOwnPropertyNames(Dummy)).toEqual(props.static);
expect(Object.getOwnPropertyNames(Dummy.prototype)).toEqual(props.onPrototypeBefore);
expect(Object.getOwnPropertyNames(new Dummy())).toEqual(props.instance);
macro(Dummy, 'hello', () => 'hello');
expect('__macros__' in Dummy).toEqual(false);
expect('__macros__' in Dummy.prototype).toEqual(true);
expect('__macros__' in new Dummy()).toEqual(true);
expect('hello' in Dummy).toEqual(false);
expect('hello' in Dummy.prototype).toEqual(true);
expect('hello' in new Dummy()).toEqual(true);
expect(Object.getOwnPropertyNames(Dummy)).toEqual(props.static);
expect(Object.getOwnPropertyNames(Dummy.prototype)).toEqual(props.onPrototypeAfter);
expect(Object.getOwnPropertyNames(new Dummy())).toEqual(props.instance);
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(undefined);
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['hello']));
// @ts-expect-error shush
expect(new Dummy().__macros__).toEqual(new Set(['hello']));
// @ts-expect-error shush
expect(Dummy.hello).toEqual(undefined);
// @ts-expect-error shush
expect(Dummy.prototype.hello()).toEqual('hello');
// @ts-expect-error shush
expect(new Dummy().hello()).toEqual('hello');
});
it("can add a macro to a class/function's prototype", () => {
const Dummy = makeDummyClass();
expect('__macros__' in Dummy).toEqual(false);
expect('__macros__' in Dummy.prototype).toEqual(false);
expect('__macros__' in new Dummy()).toEqual(false);
expect('hello' in Dummy).toEqual(false);
expect('hello' in Dummy.prototype).toEqual(false);
expect('hello' in new Dummy()).toEqual(false);
expect(Object.getOwnPropertyNames(Dummy)).toEqual(props.static);
expect(Object.getOwnPropertyNames(Dummy.prototype)).toEqual(props.onPrototypeBefore);
expect(Object.getOwnPropertyNames(new Dummy())).toEqual(props.instance);
macro(Dummy.prototype, 'hello', () => 'hello');
expect('__macros__' in Dummy).toEqual(false);
expect('__macros__' in Dummy.prototype).toEqual(true);
expect('__macros__' in new Dummy()).toEqual(true);
expect('hello' in Dummy).toEqual(false);
expect('hello' in Dummy.prototype).toEqual(true);
expect('hello' in new Dummy()).toEqual(true);
expect(Object.getOwnPropertyNames(Dummy)).toEqual(props.static);
expect(Object.getOwnPropertyNames(Dummy.prototype)).toEqual(props.onPrototypeAfter);
expect(Object.getOwnPropertyNames(new Dummy())).toEqual(props.instance);
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(undefined);
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['hello']));
// @ts-expect-error shush
expect(new Dummy().__macros__).toEqual(new Set(['hello']));
// @ts-expect-error shush
expect(Dummy.hello).toEqual(undefined);
// @ts-expect-error shush
expect(Dummy.prototype.hello()).toEqual('hello');
// @ts-expect-error shush
expect(new Dummy().hello()).toEqual('hello');
macro(Dummy, 'yolo', {
abc: () => 'abc',
get yeah() {
// @ts-expect-error shush
if (this.called) {
return 'called!';
}
// @ts-expect-error shush
this.called = true;
return 'yeah';
},
});
// @ts-expect-error shush
expect(new Dummy().__macros__).toEqual(new Set(['hello', 'yolo']));
// @ts-expect-error shush
expect(new Dummy().yolo.abc()).toEqual('abc');
// @ts-expect-error shush
expect(new Dummy().yolo.yeah).toEqual('yeah');
// @ts-expect-error shush
expect(new Dummy().yolo.yeah).toEqual('called!');
});
it('can add a macro to a class/function', () => {
const Dummy = makeDummyClass();
expect('__macros__' in Dummy).toEqual(false);
expect('__macros__' in Dummy.prototype).toEqual(false);
expect('__macros__' in new Dummy()).toEqual(false);
expect('hello' in Dummy).toEqual(false);
expect('hello' in Dummy.prototype).toEqual(false);
expect('hello' in new Dummy()).toEqual(false);
expect(Object.getOwnPropertyNames(Dummy)).toEqual(props.static);
expect(Object.getOwnPropertyNames(Dummy.prototype)).toEqual(props.onPrototypeBefore);
expect(Object.getOwnPropertyNames(new Dummy())).toEqual(props.instance);
macro(Dummy, 'hello', () => 'hello', { onFunctionPrototype: false });
expect('__macros__' in Dummy).toEqual(true);
expect('__macros__' in Dummy.prototype).toEqual(false);
expect('__macros__' in new Dummy()).toEqual(false);
expect('hello' in Dummy).toEqual(true);
expect('hello' in Dummy.prototype).toEqual(false);
expect('hello' in new Dummy()).toEqual(false);
expect(Object.getOwnPropertyNames(Dummy)).toEqual(props.fullStatic);
expect(Object.getOwnPropertyNames(Dummy.prototype)).toEqual(props.onPrototypeBefore);
expect(Object.getOwnPropertyNames(new Dummy())).toEqual(props.instance);
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(new Set(['hello']));
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(undefined);
// @ts-expect-error shush
expect(new Dummy().__macros__).toEqual(undefined);
// @ts-expect-error shush
expect(Dummy.hello()).toEqual('hello');
// @ts-expect-error shush
expect(Dummy.prototype.hello).toEqual(undefined);
// @ts-expect-error shush
expect(new Dummy().hello).toEqual(undefined);
macro(
Dummy,
'yolo',
{
abc: () => 'abc',
get yeah() {
// @ts-expect-error shush
if (this.called) {
return 'called!';
}
// @ts-expect-error shush
this.called = true;
return 'yeah';
},
},
{ onFunctionPrototype: false }
);
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(new Set(['hello', 'yolo']));
// @ts-expect-error shush
expect(Dummy.yolo.abc()).toEqual('abc');
// @ts-expect-error shush
expect(Dummy.yolo.yeah).toEqual('yeah');
// @ts-expect-error shush
expect(Dummy.yolo.yeah).toEqual('called!');
});
it('can add a macro to an object litteral', () => {
const Dummy = makeDummyObject();
const keys = Object.keys(Dummy);
expect('__macros__' in Dummy).toEqual(false);
expect('hello' in Dummy).toEqual(false);
expect(Object.getOwnPropertyNames(Dummy)).toEqual(keys);
macro(Dummy, 'hello', () => 'hello');
expect('__macros__' in Dummy).toEqual(true);
expect('hello' in Dummy).toEqual(true);
expect(Object.getOwnPropertyNames(Dummy)).toEqual([...keys, 'hello', '__macros__']);
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(new Set(['hello']));
// @ts-expect-error shush
expect(Dummy.hello()).toEqual('hello');
macro(Dummy, 'yolo', {
abc: () => 'abc',
get yeah() {
// @ts-expect-error shush
if (this.called) {
return 'called!';
}
// @ts-expect-error shush
this.called = true;
return 'yeah';
},
});
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(new Set(['hello', 'yolo']));
// @ts-expect-error shush
expect(Dummy.yolo.abc()).toEqual('abc');
// @ts-expect-error shush
expect(Dummy.yolo.yeah).toEqual('yeah');
// @ts-expect-error shush
expect(Dummy.yolo.yeah).toEqual('called!');
});
it('can add a macro to an object', () => {
const Dummy: unknown[] = [];
expect('__macros__' in Dummy).toEqual(false);
expect('hi' in Dummy).toEqual(false);
expect(Object.getOwnPropertyNames(Dummy)).toEqual(['length']);
macro(Dummy, 'hello', () => 'hello');
expect('__macros__' in Dummy).toEqual(true);
expect('hello' in Dummy).toEqual(true);
expect(Object.getOwnPropertyNames(Dummy)).toEqual(['length', 'hello', '__macros__']);
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(new Set(['hello']));
// @ts-expect-error shush
expect(Dummy.hello()).toEqual('hello');
// The "onFunctionPrototype" option here should have no effet, as the target is not a function
macro(Dummy, 'hi', () => 'hi', { onFunctionPrototype: false });
expect('__macros__' in Dummy).toEqual(true);
expect('hi' in Dummy).toEqual(true);
expect(Object.getOwnPropertyNames(Dummy)).toEqual(['length', 'hello', '__macros__', 'hi']);
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(new Set(['hello', 'hi']));
// @ts-expect-error shush
expect(Dummy.hi()).toEqual('hi');
});
it('can replace a macroed property', () => {
const Dummy = makeDummyClass();
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(undefined);
// @ts-expect-error shush
expect(Dummy.prototype.hello).toEqual(undefined);
macro(Dummy, 'hello', () => 'hello');
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['hello']));
// @ts-expect-error shush
expect(Dummy.prototype.hello()).toEqual('hello');
// @ts-expect-error shush
expect(new Dummy().hello()).toEqual('hello');
macro(Dummy, 'hello', () => 'hi');
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['hello']));
// @ts-expect-error shush
expect(Dummy.prototype.hello()).toEqual('hello');
// @ts-expect-error shush
expect(new Dummy().hello()).toEqual('hello');
macro(Dummy, 'hello', () => 'hi', { force: true });
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['hello']));
// @ts-expect-error shush
expect(Dummy.prototype.hello()).toEqual('hi');
// @ts-expect-error shush
expect(new Dummy().hello()).toEqual('hi');
});
it('can replace a `native` class/function property', () => {
const Dummy = makeDummyClass();
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(undefined);
expect(Dummy.prototype.ooh()).toEqual('ooh');
macro(Dummy, 'ooh', () => 'hi');
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(undefined);
expect(Dummy.prototype.ooh()).toEqual('ooh');
macro(Dummy, 'ooh', () => 'hi', { force: true });
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['ooh']));
expect(Dummy.prototype.ooh()).toEqual('hi');
});
it('can try to replace a `native` object property', () => {
const Dummy: unknown[] = [];
expect('__macros__' in Dummy).toEqual(false);
expect(Object.getOwnPropertyNames(Dummy)).toEqual(['length']);
expect(Dummy.length).toEqual(0);
macro(Dummy, 'length', () => 'hi');
expect('__macros__' in Dummy).toEqual(false);
expect(Dummy.length).toEqual(0);
expect(() => macro(Dummy, 'length', () => 'hi', { force: true })).toThrow('Invalid array length');
expect('__macros__' in Dummy).toEqual(false);
expect(Dummy.length).toEqual(0);
expect(() => macro(Dummy, 'length', 1, { force: true })).toThrow('Cannot redefine property: length');
expect('__macros__' in Dummy).toEqual(false);
expect(Dummy.length).toEqual(0);
expect(() => macro(Dummy, 'length', 1, { force: true })).toThrow('Cannot redefine property: length');
expect('__macros__' in Dummy).toEqual(false);
expect(Object.getOwnPropertyNames(Dummy)).toEqual(['length']);
expect(Dummy.length).toEqual(0);
expect('filter' in Dummy).toEqual(true);
// @ts-expect-error shush
expect(() => Dummy.filter()).toThrow('undefined is not a function');
macro(Dummy, 'filter', () => 'hi');
expect('__macros__' in Dummy).toEqual(false);
expect('filter' in Dummy).toEqual(true);
// @ts-expect-error shush
expect(() => Dummy.filter()).toThrow('undefined is not a function');
macro(Dummy, 'filter', () => 'hi', { force: true });
expect('__macros__' in Dummy).toEqual(true);
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(new Set(['filter']));
expect('filter' in Dummy).toEqual(true);
// @ts-expect-error shush
expect(Dummy.filter()).toEqual('hi');
});
it('can replace a `native` getter property', () => {
const Dummy = makeDummyClass();
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(undefined);
expect(Dummy.prototype.level).toEqual(undefined);
expect(new Dummy().level).toEqual(7);
macro(Dummy, 'level', 'hi');
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(undefined);
expect(Dummy.prototype.level).toEqual(undefined);
expect(new Dummy().level).toEqual(7);
macro(Dummy, 'level', 'hi', { force: true });
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['level']));
expect(Dummy.prototype.level).toEqual('hi');
expect(new Dummy().level).toEqual('hi');
macro(Dummy, 'level', () => 'hi again');
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['level']));
expect(Dummy.prototype.level).toEqual('hi');
expect(new Dummy().level).toEqual('hi');
macro(Dummy, 'level', () => 'hi again', { force: true });
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['level']));
// @ts-expect-error shush
expect(Dummy.prototype.level()).toEqual('hi again');
// @ts-expect-error shush
expect(new Dummy().level()).toEqual('hi again');
macro(Dummy, 'level', 7, { force: true });
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['level']));
expect(Dummy.prototype.level).toEqual(7);
expect(new Dummy().level).toEqual(7);
});
it('can replace a `native` static property', () => {
const Dummy = makeDummyClass();
expect('hi' in Dummy.prototype).toEqual(false);
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(undefined);
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(undefined);
expect(Dummy.hi()).toEqual('hi');
macro(Dummy, 'hi', 'howdy');
expect('hi' in Dummy.prototype).toEqual(true);
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['hi']));
// @ts-expect-error shush
expect(Dummy.prototype.hi).toEqual('howdy');
// @ts-expect-error shush
expect(new Dummy().hi).toEqual('howdy');
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(undefined);
expect(Dummy.hi()).toEqual('hi');
macro(Dummy, 'hi', 'howdy', { onFunctionPrototype: false });
expect('hi' in Dummy.prototype).toEqual(true);
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['hi']));
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(undefined);
expect(Dummy.hi()).toEqual('hi');
macro(Dummy, 'hi', "howdy y'all", { force: true, onFunctionPrototype: false });
expect('hi' in Dummy.prototype).toEqual(true);
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['hi']));
// @ts-expect-error shush
expect(Dummy.prototype.hi).toEqual('howdy');
// @ts-expect-error shush
expect(new Dummy().hi).toEqual('howdy');
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(new Set(['hi']));
expect(Dummy.hi).toEqual("howdy y'all");
macro(Dummy, 'hi', () => "howdy y'all bis!", { force: true, onFunctionPrototype: false });
// @ts-expect-error shush
expect(new Dummy().hi).toEqual('howdy');
// @ts-expect-error shush
expect(Dummy.__macros__).toEqual(new Set(['hi']));
expect(Dummy.hi()).toEqual("howdy y'all bis!");
});
it('can have access to the object being macroed', () => {
const Dummy = makeDummyClass();
macro(Dummy, 'self', () => this);
// @ts-expect-error shush
expect(Dummy.prototype.self()).toEqual({});
// @ts-expect-error shush
expect(new Dummy().self()).toEqual({});
macro(
Dummy,
'self',
function () {
// @ts-expect-error shush
return this;
},
{ force: true }
);
// @ts-expect-error shush
expect(Dummy.prototype.self()).toEqual(Dummy.prototype);
// @ts-expect-error shush
expect(new Dummy().self()).toEqual(new Dummy());
});
test('the macro name can be a symbol', () => {
const Dummy = class Dummy {};
const THIS = Symbol('this');
macro(
Dummy,
// @ts-expect-error shush
THIS,
function () {
// @ts-expect-error shush
return this;
}
);
// @ts-expect-error shush
expect(Dummy.prototype[THIS]()).toEqual(Dummy.prototype);
// @ts-expect-error shush
expect(new Dummy()[THIS]()).toEqual(new Dummy());
macro(
Dummy,
// @ts-expect-error shush
Symbol.toPrimitive,
(hint: string) => {
if (hint === 'number') {
return 77;
}
if (hint === 'string') {
return '!!!';
}
return '@';
}
);
expect(+Dummy.prototype).toEqual(77);
expect(`${Dummy.prototype}`).toEqual('!!!');
expect(Dummy.prototype + '').toEqual('@');
expect(+new Dummy()).toEqual(77);
expect(`${new Dummy()}`).toEqual('!!!');
expect(new Dummy() + '').toEqual('@');
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set([THIS, Symbol.toPrimitive]));
});
test('the `__macros__` property does not contain duplicate values', () => {
const Dummy = makeDummyClass();
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(undefined);
macro(Dummy, 'hello', () => '_hello', { force: true });
macro(Dummy, 'hi', () => '_hi', { force: true });
macro(Dummy, 'hey', () => '_hey', { force: true });
macro(Dummy, 'level', () => '_level', { force: true });
macro(Dummy, 'self', () => '_self', { force: true });
macro(Dummy, 'bye', () => '_bye', { force: true });
macro(Dummy, 'bye', () => '__bye', { force: true });
macro(Dummy, 'level', () => '__level', { force: true });
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['hello', 'hi', 'hey', 'level', 'self', 'bye']));
// @ts-expect-error shush
expect(Dummy.prototype.bye()).toEqual('__bye');
// @ts-expect-error shush
expect(Dummy.prototype.level()).toEqual('__level');
macro(Dummy, 'new', () => 'new', { force: true });
macro(Dummy, 'new', () => 'newest new', { force: true });
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['hello', 'hi', 'hey', 'level', 'self', 'bye', 'new']));
// @ts-expect-error shush
expect(Dummy.prototype.new()).toEqual('newest new');
});
test("the `__macros__` property's descriptor", () => {
const Dummy = makeDummyClass();
macro(Dummy, 'new', () => 'hello');
expect(Object.getOwnPropertyDescriptor(Dummy.prototype, '__macros__')).toEqual({
value: new Set(['new']),
writable: false,
enumerable: false,
configurable: false,
});
expect(() => {
// @ts-expect-error shush
delete Dummy.prototype.__macros__;
}).toThrow("Cannot delete property '__macros__' of #<Dummy>");
expect(() => {
// @ts-expect-error shush
Dummy.prototype.__macros__ = 'hey';
}).toThrow("Cannot assign to read only property '__macros__' of object '#<Dummy>'");
for (const key in Dummy.prototype) {
if (Object.prototype.hasOwnProperty.call(Dummy.prototype, key)) {
expect(key).toEqual('new');
}
expect(key).toEqual('new');
}
// @ts-expect-error shush
Dummy.prototype.__macros__.add('ooh');
// @ts-expect-error shush
expect(Dummy.prototype.__macros__).toEqual(new Set(['new', 'ooh']));
});
});