[njs] Fixed global objects.

[Dmitry Volyntsev]

details: http://hg.nginx.org/njs/rev/e11011d45499
branches:
changeset: 655:e11011d45499
user: Dmitry Volyntsev <***@nginx.com>
date: Thu Nov 15 20:31:35 2018 +0300
description:
Fixed global objects.

1) Making it extensible.
2) Adding default properties according to ES5.1:15.1.1.

diffstat:

njs/njs_builtin.c | 27 +++++++++++++++++++++++++--
njs/test/njs_unit_test.c | 30 ++++++++++++++++++++++++++++++
2 files changed, 55 insertions(+), 2 deletions(-)

diffs (91 lines):

diff -r 2711e84ede6a -r e11011d45499 njs/njs_builtin.c
--- a/njs/njs_builtin.c Wed Apr 04 17:38:10 2018 +0300
+++ b/njs/njs_builtin.c Thu Nov 15 20:31:35 2018 +0300
@@ -276,6 +276,7 @@ njs_builtin_objects_create(njs_vm_t *vm)
}

object->shared = 1;
+ object->extensible = 1;

object++;
}
@@ -1118,8 +1119,30 @@ const njs_object_init_t njs_njs_object_
};


+static const njs_object_prop_t njs_global_this_object_properties[] =
+{
+ {
+ .type = NJS_PROPERTY,
+ .name = njs_string("NaN"),
+ .value = njs_value(NJS_NUMBER, 0, NAN),
+ },
+
+ {
+ .type = NJS_PROPERTY,
+ .name = njs_string("Infinity"),
+ .value = njs_value(NJS_NUMBER, 0, INFINITY),
+ },
+
+ {
+ .type = NJS_PROPERTY,
+ .name = njs_string("undefined"),
+ .value = njs_value(NJS_VOID, 0, NAN),
+ },
+};
+
+
const njs_object_init_t njs_global_this_init = {
nxt_string("this"),
- NULL,
- 0
+ njs_global_this_object_properties,
+ nxt_nitems(njs_global_this_object_properties)
};
diff -r 2711e84ede6a -r e11011d45499 njs/test/njs_unit_test.c
--- a/njs/test/njs_unit_test.c Wed Apr 04 17:38:10 2018 +0300
+++ b/njs/test/njs_unit_test.c Thu Nov 15 20:31:35 2018 +0300
@@ -6488,6 +6488,33 @@ static njs_unit_test_t njs_test[] =
{ nxt_string("this"),
nxt_string("[object Object]") },

+ { nxt_string("this.a = 1; this.a"),
+ nxt_string("1") },
+
+ { nxt_string("this.undefined = 42"),
+ nxt_string("TypeError: Cannot assign to read-only property 'undefined' of object") },
+
+ { nxt_string("this.Infinity = 42"),
+ nxt_string("TypeError: Cannot assign to read-only property 'Infinity' of object") },
+
+ { nxt_string("this.NaN = 42"),
+ nxt_string("TypeError: Cannot assign to read-only property 'NaN' of object") },
+
+ { nxt_string("typeof this.undefined"),
+ nxt_string("undefined") },
+
+ { nxt_string("typeof this.Infinity"),
+ nxt_string("number") },
+
+ { nxt_string("this.Infinity + 1"),
+ nxt_string("Infinity") },
+
+ { nxt_string("typeof this.NaN"),
+ nxt_string("number") },
+
+ { nxt_string("this.NaN + 1"),
+ nxt_string("NaN") },
+
{ nxt_string("njs"),
nxt_string("[object Object]") },

@@ -9177,6 +9204,9 @@ static njs_unit_test_t njs_test[] =
{ nxt_string("Math"),
nxt_string("[object Object]") },

+ { nxt_string("Math.x = function (x) {return 2*x;}; Math.x(3)"),
+ nxt_string("6") },
+
{ nxt_string("isNaN"),
nxt_string("[object Function]") },