[njs] Added externals backtrace test.

[Dmitry Volyntsev]

details:   https://hg.nginx.org/njs/rev/51ce6ffc3c66
branches:  
changeset: 1352:51ce6ffc3c66
user:      Dmitry Volyntsev <xeioex at nginx.com>
date:      Thu Mar 05 15:24:54 2020 +0300
description:
Added externals backtrace test.

diffstat:

 src/test/njs_interactive_test.c |  5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diffs (15 lines):

diff -r eb9258cfcf40 -r 51ce6ffc3c66 src/test/njs_interactive_test.c
--- a/src/test/njs_interactive_test.c	Thu Mar 05 15:24:52 2020 +0300
+++ b/src/test/njs_interactive_test.c	Thu Mar 05 15:24:54 2020 +0300
@@ -185,6 +185,11 @@ static njs_interactive_test_t  njs_test[
                  "    at eval (native)\n"
                  "    at main (native)\n") },
 
+    { njs_str("$r.some_method({}.a.a)" ENTER),
+      njs_str("TypeError: cannot get property \"a\" of undefined\n"
+                 "    at request.proto.some_method (native)\n"
+                 "    at main (native)\n") },
+
     { njs_str("new Function(\n\n@)" ENTER),
       njs_str("SyntaxError: Unexpected token \"@\" in 3") },