Object-getOwnPropertyNamesLength.js

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// Basic getOwnPropertyNamesLength tests.

var g = newGlobal({ newCompartment: true });

var dbg = Debugger();

var gobj = dbg.addDebuggee(g);

function testGetOwnPropertyLength(code) {

  code = `(${code});`;

  const expected = Object.getOwnPropertyNames(eval(code)).length;

  g.eval(`obj =  ${code}`);

  const length = gobj

    .getOwnPropertyDescriptor("obj")

    .value.getOwnPropertyNamesLength();

  assertEq(length, expected, `Expected result for: ${code}`);

testGetOwnPropertyLength("{}");

testGetOwnPropertyLength("{a: 0, b: 1}");

testGetOwnPropertyLength("{'name with space': 0}");

testGetOwnPropertyLength("{get x() {}, set y(v) {}}");

testGetOwnPropertyLength("{get x() { throw 'fit'; }}");

testGetOwnPropertyLength("Object.create({a: 1})");

testGetOwnPropertyLength("Object.create({get a() {}, set a(v) {}})");

testGetOwnPropertyLength(

  "(function () { var x = {a: 0, b: 1}; delete a; return x; })()"

);

testGetOwnPropertyLength("Object.create(null, {x: {value: 0}})");

testGetOwnPropertyLength("[]");

testGetOwnPropertyLength("[0, 1, 2]");

testGetOwnPropertyLength("[,,,,,]");

testGetOwnPropertyLength("/a*a/");

testGetOwnPropertyLength("function () {}");

testGetOwnPropertyLength(

  `(function () {

      var x = {};

      x[Symbol()] = 1;

      x[Symbol.for('moon')] = 2;

      x[Symbol.iterator] = 3;

      return x;

    })()`

);