details: http://hg.nginx.org/njs/rev/b2ccd7673a5e
branches:
changeset: 368:b2ccd7673a5e
user: Dmitry Volyntsev <xeioex@nginx.com>
date: Mon Jun 19 14:41:03 2017 +0300
description:
Object.isFrozen() method.

diffstat:

njs/njs_object.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++
njs/test/njs_unit_test.c | 51 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 107 insertions(+), 0 deletions(-)

diffs (134 lines):

diff -r 4d5a5d618fca -r b2ccd7673a5e njs/njs_object.c
--- a/njs/njs_object.c Mon Jun 19 14:40:14 2017 +0300
+++ b/njs/njs_object.c Mon Jun 19 14:41:03 2017 +0300
@@ -755,6 +755,54 @@ njs_object_freeze(njs_vm_t *vm, njs_valu


static njs_ret_t
+njs_object_is_frozen(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 || prop->configurable) {
+ 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)
{
@@ -957,6 +1005,14 @@ static const njs_object_prop_t njs_obje
NJS_SKIP_ARG, NJS_OBJECT_ARG),
},

+ /* Object.isFrozen(). */
+ {
+ .type = NJS_METHOD,
+ .name = njs_string("isFrozen"),
+ .value = njs_native_function(njs_object_is_frozen, 0,
+ NJS_SKIP_ARG, NJS_OBJECT_ARG),
+ },
+
/* Object.preventExtensions(). */
{
.type = NJS_METHOD,
diff -r 4d5a5d618fca -r b2ccd7673a5e njs/test/njs_unit_test.c
--- a/njs/test/njs_unit_test.c Mon Jun 19 14:40:14 2017 +0300
+++ b/njs/test/njs_unit_test.c Mon Jun 19 14:41:03 2017 +0300
@@ -6164,6 +6164,57 @@ static njs_unit_test_t njs_test[] =
{ nxt_string("var r = Object.freeze(new RegExp('')); r.a = 1; r.a"),
nxt_string("undefined") },

+ { nxt_string("Object.isFrozen({a:1})"),
+ nxt_string("false") },
+
+ { nxt_string("Object.isFrozen([1,2])"),
+ nxt_string("false") },
+
+ { nxt_string("Object.isFrozen(function() {})"),
+ nxt_string("false") },
+
+ { nxt_string("Object.isFrozen(new Date(''))"),
+ nxt_string("false") },
+
+ { nxt_string("Object.isFrozen(new RegExp(''))"),
+ nxt_string("false") },
+
+ { nxt_string("Object.isFrozen(1)"),
+ nxt_string("TypeError") },
+
+ { nxt_string("Object.isFrozen('')"),
+ nxt_string("TypeError") },
+
+ { nxt_string("Object.isFrozen(Object.defineProperties({}, {a:{value:1}}))"),
+ nxt_string("false") },
+
+ { nxt_string("var o = Object.defineProperties({}, {a:{}, b:{}});"
+ "o = Object.preventExtensions(o);"
+ "Object.isFrozen(o)"),
+ nxt_string("true") },
+
+ { nxt_string("var o = Object.defineProperties({}, {a:{}, b:{writable:1}});"
+ "o = Object.preventExtensions(o);"
+ "Object.isFrozen(o)"),
+ nxt_string("false") },
+
+ { nxt_string("var o = Object.defineProperties({}, {a:{writable:1}});"
+ "o = Object.preventExtensions(o);"
+ "Object.isFrozen(o)"),
+ nxt_string("false") },
+
+ { nxt_string("var o = Object.defineProperties({}, {a:{configurable:1}});"
+ "o = Object.preventExtensions(o);"
+ "Object.isFrozen(o)"),
+ nxt_string("false") },
+
+ { 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") },
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