39ad42defd
Includes all traps except the following: [[Call]], [[Construct]], [[OwnPropertyKeys]]. An important implication of this commit is that any call to any virtual Object method has the potential to throw an exception. These methods were not checked in this commit -- a future commit will have to protect these various method calls throughout the codebase.
49 lines
1.2 KiB
JavaScript
49 lines
1.2 KiB
JavaScript
load("test-common.js");
|
|
|
|
try {
|
|
assert(Object.isExtensible(new Proxy({}, { isExtensible: null })) === true);
|
|
assert(Object.isExtensible(new Proxy({}, { isExtensible: undefined })) === true);
|
|
assert(Object.isExtensible(new Proxy({}, {})) === true);
|
|
|
|
let o = {};
|
|
let p = new Proxy(o, {
|
|
isExtensible(target) {
|
|
assert(target === o);
|
|
return true;
|
|
}
|
|
});
|
|
|
|
Object.isExtensible(p);
|
|
|
|
// Invariants
|
|
|
|
o = {};
|
|
p = new Proxy(o, {
|
|
isExtensible(proxyTarget) {
|
|
assert(proxyTarget === o);
|
|
return true;
|
|
},
|
|
});
|
|
|
|
assert(Object.isExtensible(p) === true);
|
|
Object.preventExtensions(o);
|
|
|
|
assertThrowsError(() => {
|
|
Object.isExtensible(p);
|
|
}, {
|
|
error: TypeError,
|
|
message: "Proxy handler's isExtensible trap violates invariant: return value must match the target's extensibility",
|
|
});
|
|
|
|
p = new Proxy(o, {
|
|
isExtensible(proxyTarget) {
|
|
assert(proxyTarget === o);
|
|
return false;
|
|
},
|
|
});
|
|
assert(Object.isExtensible(p) === false);
|
|
|
|
console.log("PASS");
|
|
} catch (e) {
|
|
console.log("FAIL: " + e);
|
|
}
|