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setJitCompilerOption("ic.force-megamorphic", 1);
function testBasic() {
// Create various native objects with dense elements.
var objs = [[1, 2, 3], {0: 1, 1: 2, 2: 3}];
var fun = x => x;
fun[0] = 1;
fun[1] = 2;
fun[2] = 3;
objs.push(fun);
for (var i = 0; i < 20; i++) {
var o = {};
o["x" + i] = i;
o[0] = 1;
o[1] = 2;
if (i < 10) {
o[2] = 3;
} else {
// o[2] will be a hole.
o[3] = 4;
}
objs.push(o);
}
// Access their dense elements.
for (var i = 0; i < 10; i++) {
for (var j = 0; j < objs.length; j++) {
var obj = objs[j];
assertEq(obj[0], 1);
assertEq(obj[1], 2);
assertEq(obj[2], j < 13 ? 3 : undefined);
assertEq(obj[3], j >= 13 ? 4 : undefined);
assertEq(0 in obj, true);
assertEq(1 in obj, true);
assertEq(2 in obj, j < 13);
assertEq(3 in obj, j >= 13);
assertEq(Object.hasOwn(obj, 0), true);
assertEq(Object.hasOwn(obj, 1), true);
assertEq(Object.hasOwn(obj, 2), j < 13);
assertEq(Object.hasOwn(obj, 3), j >= 13);
}
}
}
testBasic();
function testNonNative() {
var arr = [1, 2, 3];
var proxy = new Proxy({}, {
get(target, prop) { return 456; },
has(target, prop) { return prop === "0"; },
});
for (var i = 0; i < 100; i++) {
var obj = i < 95 ? arr : proxy;
assertEq(obj[0], i < 95 ? 1 : 456);
assertEq(0 in obj, true);
assertEq(1 in obj, i < 95);
assertEq(4 in obj, false);
assertEq(Object.hasOwn(obj, 0), i < 95);
assertEq(Object.hasOwn(obj, 1), i < 95);
assertEq(Object.hasOwn(obj, 4), false);
}
}
testNonNative();
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