nxt_unit_app_test.c: Test if nxt_unit_response_add_content(3) can be called several times

It can.

$ echo -e 'GET / HTTP/1.1\r\nHost: _\n' | ncat localhost 80;
HTTP/1.1 200 OK
Content-Type: text/plain
Server: Unit/1.30.0
Date: Sat, 20 May 2023 20:38:04 GMT
Transfer-Encoding: chunked

9b
Hello world!
Request data:
  Method: GET
  Protocol: HTTP/1.1
  Remote addr: 127.0.0.1
  Local addr: 127.0.0.1
  Target: /
  Path: /
  Fields:
    Host: _

15
But send this first.

15
Some extra contents.

e
And some more

0

Signed-off-by: Alejandro Colomar <alx@kernel.org>

1 files changed, 7 insertions, 4 deletions

diff --git a/src/nxt_unit_app_test.c b/src/nxt_unit_app_test.c
index a5dc1aa..62fef41 100644
--- a/src/nxt_unit_app_test.c
+++ b/src/nxt_unit_app_test.c
@@ -19,7 +19,6 @@
 
 #define CONTENT_TYPE  "Content-Type"
 #define TEXT_PLAIN    "text/plain"
-#define HELLO_WORLD   "Hello world!\n"
 
 #define NEW_LINE      "\n"
 
@@ -160,7 +159,7 @@ greeting_app_request_handler(nxt_unit_request_info_t *req)
                                 1 /* Number of response headers. */,
                                 nxt_length(CONTENT_TYPE)
                                 + nxt_length(TEXT_PLAIN)
-                                + nxt_length(HELLO_WORLD));
+                                + nxt_length("Hello world\n!"));
     if (nxt_slow_path(rc != NXT_UNIT_OK)) {
         goto fail;
     }
@@ -172,8 +171,12 @@ greeting_app_request_handler(nxt_unit_request_info_t *req)
         goto fail;
     }
 
-    rc = nxt_unit_response_add_content(req, HELLO_WORLD,
-                                       nxt_length(HELLO_WORLD));
+    rc = nxt_unit_response_add_content(req, "Hello", nxt_length("Hello"));
+    if (nxt_slow_path(rc != NXT_UNIT_OK)) {
+        goto fail;
+    }
+    rc = nxt_unit_response_add_content(req, " world!\n",
+                                       nxt_length(" world!\n"));
     if (nxt_slow_path(rc != NXT_UNIT_OK)) {
         goto fail;
     }