diff options
Diffstat (limited to 'js/src/jit-test/tests/proxy/testSetImmutablePrototype.js')
| -rw-r--r-- | js/src/jit-test/tests/proxy/testSetImmutablePrototype.js | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/proxy/testSetImmutablePrototype.js b/js/src/jit-test/tests/proxy/testSetImmutablePrototype.js new file mode 100644 index 0000000000..bc61dbbfcf --- /dev/null +++ b/js/src/jit-test/tests/proxy/testSetImmutablePrototype.js @@ -0,0 +1,11 @@ +load(libdir + "asserts.js"); + +let p = {}; +let x = new Proxy({__proto__: p}, {}); +assertEq(Reflect.getPrototypeOf(x), p); +setImmutablePrototype(x); +assertEq(Reflect.getPrototypeOf(x), p); +assertEq(Reflect.setPrototypeOf(x, Date.prototype), false); +assertEq(Reflect.setPrototypeOf(x, p), true); +assertThrowsInstanceOf(() => Object.setPrototypeOf(x, Date.prototype), TypeError); +assertEq(Reflect.getPrototypeOf(x), p); |