v8/test/mjsunit/es6/proxies-hash.js

// Copyright 2011 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


// Helper.

function TestWithProxies(test, construct, handler) {
  test(construct, handler, function(h) { return new Proxy({}, h) })
  // TODO(cbruni): Adapt and enable once we have [[Call]] working.
  // test(construct, handler, function(h) {
  //  return Proxy.createFunction(h, function() {})
  // })
}


// Sets.

function TestSet(construct, fix) {
  TestWithProxies(TestSet2, construct, fix)
}

function TestSet2(construct, fix, create) {
  var handler = {fix: function() { return {} }}
  var p1 = create(handler)
  var p2 = create(handler)
  var p3 = create(handler)
  fix(p3)

  var s = new construct();
  s.add(p1);
  s.add(p2);
  assertTrue(s.has(p1));
  assertTrue(s.has(p2));
  assertFalse(s.has(p3));

  fix(p1)
  fix(p2)
  assertTrue(s.has(p1));
  assertTrue(s.has(p2));
  assertFalse(s.has(p3));

  s.delete(p2);
  assertTrue(s.has(p1));
  assertFalse(s.has(p2));
  assertFalse(s.has(p3));
}

TestSet(Set, Object.seal)
TestSet(Set, Object.freeze)
TestSet(Set, Object.preventExtensions)


// Maps and weak maps.

function TestMap(construct, fix) {
  TestWithProxies(TestMap2, construct, fix)
}

function TestMap2(construct, fix, create) {
  var handler = {fix: function() { return {} }}
  var p1 = create(handler)
  var p2 = create(handler)
  var p3 = create(handler)
  fix(p3)

  var m = new construct();
  m.set(p1, 123);
  m.set(p2, 321);
  assertTrue(m.has(p1));
  assertTrue(m.has(p2));
  assertFalse(m.has(p3));
  assertSame(123, m.get(p1));
  assertSame(321, m.get(p2));

  fix(p1)
  fix(p2)
  assertTrue(m.has(p1));
  assertTrue(m.has(p2));
  assertFalse(m.has(p3));
  assertSame(123, m.get(p1));
  assertSame(321, m.get(p2));

  m.delete(p2);
  assertTrue(m.has(p1));
  assertFalse(m.has(p2));
  assertFalse(m.has(p3));
  assertSame(123, m.get(p1));
  assertSame(undefined, m.get(p2));
}

TestMap(Map, Object.seal)
TestMap(Map, Object.freeze)
TestMap(Map, Object.preventExtensions)

TestMap(WeakMap, Object.seal)
TestMap(WeakMap, Object.freeze)
TestMap(WeakMap, Object.preventExtensions)