details: http://hg.nginx.org/njs/rev/4d5a5d618fca
branches:
changeset: 367:4d5a5d618fca
user: Dmitry Volyntsev <xeioex@nginx.com>
date: Mon Jun 19 14:40:14 2017 +0300
description:
Object.preventExtensions() method.

diffstat:

njs/njs_object.c | 25 +++++++++++++++++++++++++
njs/test/njs_unit_test.c | 17 +++++++++++++++++
2 files changed, 42 insertions(+), 0 deletions(-)

diffs (69 lines):

diff -r 824fbb7fcd35 -r 4d5a5d618fca njs/njs_object.c
--- a/njs/njs_object.c Mon Jun 19 14:39:56 2017 +0300
+++ b/njs/njs_object.c Mon Jun 19 14:40:14 2017 +0300
@@ -754,6 +754,23 @@ njs_object_freeze(njs_vm_t *vm, njs_valu
}


+static njs_ret_t
+njs_object_prevent_extensions(njs_vm_t *vm, njs_value_t *args, nxt_uint_t nargs,
+ njs_index_t unused)
+{
+ if (nargs < 2 || !njs_is_object(&args[1])) {
+ vm->exception = &njs_exception_type_error;
+ return NXT_ERROR;
+ }
+
+ args[1].data.u.object->extensible = 0;
+
+ vm->retval = args[1];
+
+ return NXT_OK;
+}
+
+
/*
* The __proto__ property of booleans, numbers and strings primitives,
* of objects created by Boolean(), Number(), and String() constructors,
@@ -939,6 +956,14 @@ static const njs_object_prop_t njs_obje
.value = njs_native_function(njs_object_freeze, 0,
NJS_SKIP_ARG, NJS_OBJECT_ARG),
},
+
+ /* Object.preventExtensions(). */
+ {
+ .type = NJS_METHOD,
+ .name = njs_long_string("preventExtensions"),
+ .value = njs_native_function(njs_object_prevent_extensions, 0,
+ NJS_SKIP_ARG, NJS_OBJECT_ARG),
+ },
};


diff -r 824fbb7fcd35 -r 4d5a5d618fca njs/test/njs_unit_test.c
--- a/njs/test/njs_unit_test.c Mon Jun 19 14:39:56 2017 +0300
+++ b/njs/test/njs_unit_test.c Mon Jun 19 14:40:14 2017 +0300
@@ -6164,6 +6164,23 @@ 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("var o = Object.preventExtensions({a:1});"
+ "Object.defineProperty(o, 'b', {value:1})"),
+ nxt_string("TypeError") },
+
+ { nxt_string("var o = Object.preventExtensions({a:1});"
+ "Object.defineProperties(o, {b:{value:1}})"),
+ nxt_string("TypeError") },
+
+ { nxt_string("var o = Object.preventExtensions({a:1}); o.a = 2; o.a"),
+ nxt_string("2") },
+
+ { nxt_string("var o = Object.preventExtensions({a:1}); delete o.a; o.a"),
+ nxt_string("undefined") },
+
+ { nxt_string("var o = Object.preventExtensions({a:1}); o.b = 1; o.b"),
+ nxt_string("undefined") },
+
{ nxt_string("var d = new Date(''); d +' '+ d.getTime()"),
nxt_string("Invalid Date NaN") },

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