[njs] Fixed Array.prototype.fill().

[Dmitry Volyntsev]

details:   https://hg.nginx.org/njs/rev/1718603aae6a
branches:  
changeset: 797:1718603aae6a
user:      Artem S. Povalyukhin <artem.povaluhin at gmail.com>
date:      Sat Feb 23 04:21:44 2019 +0300
description:
Fixed Array.prototype.fill().

This closes #71 issue on Github.

diffstat:

 njs/njs_array.c          |  11 +++++++----
 njs/test/njs_unit_test.c |   4 ++++
 2 files changed, 11 insertions(+), 4 deletions(-)

diffs (46 lines):

diff -r 25b394b0e953 -r 1718603aae6a njs/njs_array.c
--- a/njs/njs_array.c	Sat Feb 23 04:20:23 2019 +0300
+++ b/njs/njs_array.c	Sat Feb 23 04:21:44 2019 +0300
@@ -1372,12 +1372,13 @@ static njs_ret_t
 njs_array_prototype_fill(njs_vm_t *vm, njs_value_t *args, nxt_uint_t nargs,
     njs_index_t unused)
 {
-    nxt_int_t    i, start, end, length;
-    njs_array_t  *array;
+    nxt_int_t          i, start, end, length;
+    njs_array_t        *array;
+    const njs_value_t  *value;
 
     vm->retval = args[0];
 
-    if (nargs < 2 || !njs_is_array(&args[0])) {
+    if (!njs_is_array(&args[0])) {
         return NXT_OK;
     }
 
@@ -1423,8 +1424,10 @@ njs_array_prototype_fill(njs_vm_t *vm, n
         }
     }
 
+    value = njs_arg(args, nargs, 1);
+
     for (i = start; i < end; i++) {
-        array->start[i] = args[1];
+        array->start[i] = *value;
     }
 
     return NXT_OK;
diff -r 25b394b0e953 -r 1718603aae6a njs/test/njs_unit_test.c
--- a/njs/test/njs_unit_test.c	Sat Feb 23 04:20:23 2019 +0300
+++ b/njs/test/njs_unit_test.c	Sat Feb 23 04:21:44 2019 +0300
@@ -3668,6 +3668,10 @@ static njs_unit_test_t  njs_test[] =
     { nxt_string("[1,2,3].fill({a:\"b\"}, 1, 2);"),
       nxt_string("1,[object Object],3") },
 
+    { nxt_string("Array(3).fill().reduce(function(a, x)"
+                                 "{ return a + (x === undefined); }, 0)"),
+      nxt_string("3") },
+
     { nxt_string("var a = [];"
                  "a.filter(function(v, i, a) { return v > 1 })"),
       nxt_string("") },