v8/test/mjsunit/object-is.js

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var test_set = [ {}, [], Infinity, -Infinity, "s", "ア", 0, 0/-1, null,
    undefined, true, false, Symbol("foo"), NaN ];
for (var i = 0; i < test_set.length; i++) {
  for (var j = 0; j < test_set.length; j++) {
    if (i == j) {
      assertSame(test_set[i], test_set[j]);
      assertTrue(Object.is(test_set[i], test_set[j]));
    } else {
      assertFalse(Object.is(test_set[i], test_set[j]));
    }
  }
}