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// ECMA262 9.4.5.2 [[HasProperty]]
function check_in(x, a) {
return (x in a);
}
function check_has_own(x, a) {
return a.hasOwnProperty(x);
}
//make sure baseline gets compiled
function warmup(a) {
for (var i = 0; i < 1001; i++) {
check_in(i, a);
check_has_own(i, a);
}
}
function check_assertions(a) {
assertEq(check_in(1, a), true);
assertEq(check_in("-0",a), false); // -0 access
assertEq(check_in(-10,a), false); // Negative access
assertEq(check_in(1012,a), false); // OOB access
assertEq(check_has_own(1, a), true);
assertEq(check_has_own("-0",a), false); // -0 access
assertEq(check_has_own(-10,a), false); // Negative access
assertEq(check_has_own(1012,a), false); // OOB access
}
function test_with_no_protochain(a) {
var a = new Int32Array(1000).fill(1);
warmup(a);
check_assertions(a);
}
// Attempting to validate against this comment:
//
// "Out of bounds "in" or "hasOwnProperty" should always
// return false, and not consider the prototype chain at all"
function test_with_protochain(a) {
var a = new Int32Array(1000).fill(1);
warmup(a);
// try to force the behaviour of 9.4.5.2
Object.prototype["-0"] = "value";
Object.prototype[-1] = "value";
Object.prototype[-10] = "value";
Object.prototype[1012] = "value";
check_assertions(a);
}
test_with_no_protochain();
test_with_protochain();