fixture generator

index.js

// Utils

function * typeGenerator (iterable) {
    yield * iterable;
}

function * composeGenerator (...iterables) {
    for (const iterable of iterables) yield * iterable();
}  

function runGenerator(generator) {
    const [key] = Object.keys(generator);
    
    if(key) {    
        for(const g of  generator[key]()) {
            console.log({[key]: g});
        }
    }
    else {
        for(const g of generator()) {
            console.log(g);
        }
    } 
}
const makeObject = (key, gen) => ({[key]: gen});

// Primatives
const bool = () => typeGenerator([true, false]);

const str = () => typeGenerator([
    '',
    'Lorem',
]);

const obj = () => typeGenerator([
    {},
])


// Composed Types
const strObj = () => composeGenerator(str, obj)
const boolObj = () => composeGenerator(bool, obj)

// Complex Types
const Str = (key) => makeObject(key, strObj);
const Bool = (key) => makeObject(key, boolObj);

// Tests
console.log('*********** strObj ***********');
runGenerator(strObj)
console.log('*********** boolObj ***********');
runGenerator(boolObj)

console.log('*********** Str("name") ***********');
runGenerator(Str('name'));
console.log('*********** Bool("active") ***********');
runGenerator(Bool('active'));


const Obj = (key, children) => {
    return makeObject(key, Object.assign(...children))
}

console.log(Obj('hello', [Str('name'), Bool('active')]))

/**
 * hello: {  {} | {hello: {name: {}}} | {hello: {name: {}, active:{}}}
 *  name: '' | undefined | 'Lorem' |'Lorem ipsum dolor sit amet, consectetur adipiscing elit.'|'😋😋😋😋'
 *  active: true | false
 * }
 */