Function TestChains

deps/v8/test/mjsunit/instanceof.js:34–56

()

assertTrue([] instanceof Array);

function TestChains() {
  var A = {};
  var B = {};
  var C = {};
  B.__proto__ = A;
  C.__proto__ = B;

  function F() { }
  F.prototype = A;
  assertTrue(C instanceof F);
  assertTrue(B instanceof F);
  assertFalse(A instanceof F);

  F.prototype = B;
  assertTrue(C instanceof F);
  assertFalse(B instanceof F);
  assertFalse(A instanceof F);

  F.prototype = C;
  assertFalse(C instanceof F);
  assertFalse(B instanceof F);
  assertFalse(A instanceof F);
}

TestChains();