Node Process Env Test

process.env.test.js

let value;

checkProp = (o, p) => {
    console.log("value", JSON.stringify(o[p]));
    console.log("hasProperty", p, Object.prototype.hasOwnProperty.call(o, p));
    console.log("ownProperty", p, Object.getOwnPropertyNames(o).includes(p));
    console.log();
};

runTests = object => {
    const prop = "undefinedProp";
    console.log("prop is not defined");
    checkProp(object, prop);

    value = 1
    console.log(`prop is declared as ${value} with assignment (=)`);
    object[prop] = value;
    checkProp(object, prop);

    console.log("prop is deleted", delete object[prop]);
    checkProp(object, prop);

    value = 1;
    console.log(`prop is configured as ${value} with value`);
    Object.defineProperty(object, prop, { configurable: true, value });
    checkProp(object, prop);

    console.log("prop is deleted", delete object[prop]);
    checkProp(object, prop);

    value = 1;
    console.log(`prop is configured as ${value} with getter|setter`);
    const get = () => value;
    const set = v => (value = v);
    Object.defineProperty(object, prop, { configurable: true, get, set });
    checkProp(object, prop);

    console.log("prop is deleted", delete object[prop]);
    checkProp(object, prop);

    value = 1
    console.log(`prop is redeclared as ${value} with assignment (=)`);
    object[prop] = value;
    checkProp(object, prop);

    console.log("prop is deleted", delete object[prop]);
    checkProp(object, prop);

    console.log();
};

console.log(">>> plain object <<<");
runTests({});
console.log(">>> process.env <<<");
runTests(process.env);

nodejs/node#27990