From 520fbbcc1fdd89baf65172c5fa69a99c76e80b96 Mon Sep 17 00:00:00 2001 From: Dmitry Volyntsev Date: Mon, 19 Jun 2017 14:46:46 +0300 Subject: [PATCH] Object.isSealed() method. --- njs/njs_object.c | 56 ++++++++++++++++++++++++++++++++++++++++ njs/test/njs_unit_test.c | 51 ++++++++++++++++++++++++++++++++++++ 2 files changed, 107 insertions(+) diff --git a/njs/njs_object.c b/njs/njs_object.c index 81094431..dcad7939 100644 --- a/njs/njs_object.c +++ b/njs/njs_object.c @@ -839,6 +839,54 @@ njs_object_seal(njs_vm_t *vm, njs_value_t *args, nxt_uint_t nargs, } +static njs_ret_t +njs_object_is_sealed(njs_vm_t *vm, njs_value_t *args, nxt_uint_t nargs, + njs_index_t unused) +{ + nxt_lvlhsh_t *hash; + njs_object_t *object; + njs_object_prop_t *prop; + nxt_lvlhsh_each_t lhe; + const njs_value_t *retval; + + if (nargs < 2 || !njs_is_object(&args[1])) { + vm->exception = &njs_exception_type_error; + return NXT_ERROR; + } + + retval = &njs_string_false; + + object = args[1].data.u.object; + nxt_lvlhsh_each_init(&lhe, &njs_object_hash_proto); + + hash = &object->hash; + + if (object->extensible) { + goto done; + } + + for ( ;; ) { + prop = nxt_lvlhsh_each(hash, &lhe); + + if (prop == NULL) { + break; + } + + if (prop->writable) { + goto done; + } + } + + retval = &njs_string_true; + +done: + + vm->retval = *retval; + + return NXT_OK; +} + + static njs_ret_t njs_object_prevent_extensions(njs_vm_t *vm, njs_value_t *args, nxt_uint_t nargs, njs_index_t unused) @@ -1078,6 +1126,14 @@ static const njs_object_prop_t njs_object_constructor_properties[] = NJS_SKIP_ARG, NJS_OBJECT_ARG), }, + /* Object.isSealed(). */ + { + .type = NJS_METHOD, + .name = njs_string("isSealed"), + .value = njs_native_function(njs_object_is_sealed, 0, + NJS_SKIP_ARG, NJS_OBJECT_ARG), + }, + /* Object.preventExtensions(). */ { .type = NJS_METHOD, diff --git a/njs/test/njs_unit_test.c b/njs/test/njs_unit_test.c index 22d709ec..7055c9cd 100644 --- a/njs/test/njs_unit_test.c +++ b/njs/test/njs_unit_test.c @@ -6236,6 +6236,57 @@ static njs_unit_test_t njs_test[] = { nxt_string("Object.seal('')"), nxt_string("TypeError") }, + { nxt_string("Object.isSealed({a:1})"), + nxt_string("false") }, + + { nxt_string("Object.isSealed([1,2])"), + nxt_string("false") }, + + { nxt_string("Object.isSealed(function() {})"), + nxt_string("false") }, + + { nxt_string("Object.isSealed(new Date(''))"), + nxt_string("false") }, + + { nxt_string("Object.isSealed(new RegExp(''))"), + nxt_string("false") }, + + { nxt_string("Object.isSealed(1)"), + nxt_string("TypeError") }, + + { nxt_string("Object.isSealed('')"), + nxt_string("TypeError") }, + + { nxt_string("Object.isSealed(Object.defineProperties({}, {a:{value:1}}))"), + nxt_string("false") }, + + { nxt_string("var o = Object.defineProperties({}, {a:{}, b:{}});" + "o = Object.preventExtensions(o);" + "Object.isSealed(o)"), + nxt_string("true") }, + + { nxt_string("var o = Object.defineProperties({}, {a:{}, b:{writable:1}});" + "o = Object.preventExtensions(o);" + "Object.isSealed(o)"), + nxt_string("false") }, + + { nxt_string("var o = Object.defineProperties({}, {a:{writable:1}});" + "o = Object.preventExtensions(o);" + "Object.isSealed(o)"), + nxt_string("false") }, + + { nxt_string("var o = Object.defineProperties({}, {a:{configurable:1}});" + "o = Object.preventExtensions(o);" + "Object.isSealed(o)"), + nxt_string("true") }, + + { nxt_string("var o = Object.preventExtensions({a:1});" + "Object.isFrozen(o)"), + nxt_string("false") }, + + { nxt_string("var o = Object.freeze({a:1}); Object.isFrozen(o)"), + nxt_string("true") }, + { nxt_string("var o = Object.preventExtensions({a:1});" "Object.defineProperty(o, 'b', {value:1})"), nxt_string("TypeError") }, -- 2.47.3