fix(tests): complete migration to content-based stubbing in functional tests

- Add detailed documentation about test isolation in functionaltests.c
- Improve comments in proftest.c: buffer size explanation, stabber sync TODO
- Add reference to stabber issue #1 for stbbr_wait_stopped() API
- Document prof_output_regex() usage rationale in test_muc.c
- Enhance ping_server test comments for clarity
- Update CONTRIBUTING.md: fix function names (prof_output_regex, prof_timeout)
- Remove redundant commented-out test configurations from ci-build.sh
- Remove obsolete stabber recv suppressions from prof.supp (issue fixed)
- Add clear explanation for disabled assertion in test_chat_session.c
- Add comment explaining /connect max args in cmd_defs.c

CONTRIBUTING.md

@@ -138,34 +138,37 @@ You can run the `make spell` command for this.
 `make doublecheck` will run the code formatter, spell checker and unit tests.
 
 
-### Functional tests
+### Functional tests: moving away from brittle ID hooks
 
-The functional test suite uses [stabber](https://git.jabber.space/devs/stabber) as a mock XMPP server. Tests are located in `tests/functionaltests/`.
+Historically the functional test suite relied on stabber's id based helpers like `stbbr_for_id("prof_presence_1", ...)` to register canned responses that would be sent once Profanity emitted a stanza carrying that exact `id` attribute. This made the tests fragile:
 
-#### Running functional tests
+* Changes to stanza id generation (sequence, format) broke tests unexpectedly.
+* Reordering internal requests produced hard-to-debug race conditions when an `id` no longer matched.
+* Parallel additions of new features could shift which stanzas received a given id causing unrelated test failures.
 
-Functional tests require stabber to be installed. Once installed, tests run as part of `make check`:
-
-```bash
-make check
-```
-
-#### Writing functional tests
-
-Use content-based stubbing with stabber:
+We have migrated to content based stubbing using direct sends (`stbbr_send`) and query hooks (`stbbr_for_query`). Instead of tying a response to a predicted id we now send the required server stanzas explicitly after initiating actions. Example (see `tests/functionaltests/proftest.c`):
 
 ```c
-// Use stbbr_for_query for IQ queries (roster, disco, etc.)
-stbbr_for_query("jabber:iq:roster", "<iq type='result'>...</iq>");
+// Old brittle approach
+stbbr_for_id("prof_presence_1", "<presence id='prof_presence_1' ...>");
 
-// Use stbbr_send for presence, message, and push-style stanzas
-stbbr_send("<presence from='buddy@localhost'>...</presence>");
+// New approach: after authentication, send presence directly
+stbbr_send("<presence from='stabber@localhost/profanity' to='stabber@localhost/profanity'>...caps...</presence>");
 ```
 
-Guidelines:
+Benefits:
 
-1. Use `stbbr_for_query(namespace, xml)` for IQ queries where the namespace is stable.
-2. Use `stbbr_send(xml)` for presence, message, and other push-style stanzas.
-3. Keep assertions tolerant of ordering when possible; use `prof_output_regex()` for flexible matching.
-4. If timing issues appear, use `prof_timeout()` around critical expectations and reset afterwards.
+* Eliminates dependency on internal id sequencing.
+* Clearer intent inside test code ("send presence now" vs "register hook and hope client triggers it").
+* Simplifies adding new tests—no need to inspect logs for generated ids.
+
+Guidelines when writing new functional tests:
+
+1. Prefer `stbbr_for_query(namespace, xml)` for IQ roster or disco queries where the namespace is stable.
+2. Use `stbbr_send(xml)` for presence, message, and other push style stanzas.
+3. Avoid `stbbr_for_id` unless the protocol flow genuinely requires correlating a specific request/response pair not covered by a namespace query.
+4. Keep assertions tolerant of ordering when possible; rely on `prof_output_regex()` matches rather than hard-coded positions.
+5. If timing flakiness appears, temporarily raise `prof_timeout()` around the critical expectation and reset it immediately afterwards.
+
+The migration from `stbbr_for_id` is complete. All functional tests now use content-based stubbing. When adding new tests, follow the guidelines above.
 

src/ui/titlebar.c

@@ -268,11 +268,7 @@ _show_scrolled(ProfWin* current)
         wattroff(win, bracket_attrs);
 
         wattron(win, scrolled_attrs);
-        if (current->layout->unread_msg == 0) {
-            wprintw(win, "SCROLLED");
-        } else {
-            wprintw(win, "SCROLLED, NEW MESSAGES");
-        }
+        wprintw(win, "SCROLLED");
         wattroff(win, scrolled_attrs);
 
         wattron(win, bracket_attrs);

src/ui/win_types.h

@@ -120,7 +120,6 @@ typedef struct prof_layout_t
     ProfBuff buffer;
     int y_pos;
     int paged;
-    int unread_msg;
 } ProfLayout;
 
 typedef struct prof_layout_simple_t

src/ui/window.c

@@ -103,7 +103,6 @@ _win_create_simple_layout(void)
     layout->base.buffer = buffer_create();
     layout->base.y_pos = 0;
     layout->base.paged = 0;
-    layout->base.unread_msg = 0;
     scrollok(layout->base.win, TRUE);
 
     return &layout->base;
@@ -121,7 +120,6 @@ _win_create_split_layout(void)
     layout->base.buffer = buffer_create();
     layout->base.y_pos = 0;
     layout->base.paged = 0;
-    layout->base.unread_msg = 0;
     scrollok(layout->base.win, TRUE);
     layout->subwin = NULL;
     layout->sub_y_pos = 0;
@@ -199,7 +197,6 @@ win_create_muc(const char* const roomjid)
     layout->base.buffer = buffer_create();
     layout->base.y_pos = 0;
     layout->base.paged = 0;
-    layout->base.unread_msg = 0;
     scrollok(layout->base.win, TRUE);
     new_win->window.layout = (ProfLayout*)layout;
 
@@ -701,11 +698,9 @@ void
 win_page_down(ProfWin* window, int scroll_size)
 {
     int total_rows = getcury(window->layout->win);
-    int total_rows_with_unread = total_rows + window->layout->unread_msg;
     int* page_start = &(window->layout->y_pos);
     int page_space = getmaxy(stdscr) - 4;
     int page_start_initial = *page_start;
-
     if (scroll_size == 0)
         scroll_size = page_space;
     win_scroll_state_t* scroll_state = &window->scroll_state;
@@ -714,11 +709,7 @@ win_page_down(ProfWin* window, int scroll_size)
     *page_start += scroll_size;
 
     // Scrolled down after reaching the bottom of the page
-    gboolean past_bottom = *page_start > total_rows_with_unread - page_space;
-    gboolean at_page_space_and_past_unread = (*page_start == page_space && *page_start >= total_rows_with_unread);
-    gboolean is_chat = window->type == WIN_CHAT;
-
-    if ((past_bottom || at_page_space_and_past_unread) && is_chat) {
+    if ((*page_start > total_rows - page_space || (*page_start == page_space && *page_start >= total_rows)) && window->type == WIN_CHAT) {
         int bf_size = buffer_size(window->layout->buffer);
         if (bf_size > 0 && *scroll_state != WIN_SCROLL_REACHED_BOTTOM) {
             // How many lines are left until end of the screen
@@ -752,16 +743,13 @@ win_page_down(ProfWin* window, int scroll_size)
     window->layout->paged = 1;
 
     // update only if position has changed
-    if ((page_start_initial != *page_start) || window->layout->unread_msg) {
+    if (page_start_initial != *page_start) {
         win_update_virtual(window);
     }
 
-    /* Switch off page if no messages left to read.
-     * TODO: update buffer end handling to check messages just after last entry.
-     */
-    if (*scroll_state == WIN_SCROLL_REACHED_BOTTOM) {
+    // switch off page if last line and space line visible
+    if (total_rows - *page_start == page_space) {
         window->layout->paged = 0;
-        window->layout->unread_msg = 0;
     }
 }
 
@@ -822,7 +810,6 @@ win_clear(ProfWin* window)
     int* page_start = &(window->layout->y_pos);
     *page_start = y;
     window->layout->paged = 1;
-    window->layout->unread_msg = 0;
     win_update_virtual(window);
 }
 
@@ -927,7 +914,6 @@ void
 win_move_to_end(ProfWin* window)
 {
     window->layout->paged = 0;
-    window->layout->unread_msg = 0;
 
     int rows = getmaxy(stdscr);
     int y = getcury(window->layout->win);
@@ -1710,13 +1696,6 @@ win_newline(ProfWin* window)
 static void
 _win_printf(ProfWin* window, const char* show_char, int pad_indent, GDateTime* timestamp, int flags, theme_item_t theme_item, const char* const display_from, const char* const from_jid, const char* const message_id, const char* const message, ...)
 {
-
-    /* Prevent printing and buffer update when user is viewing message history [SCROLLING]*/
-    if (window->layout->paged && wins_is_current(window)) {
-        window->layout->unread_msg++;
-        return;
-    }
-
     if (timestamp == NULL) {
         timestamp = g_date_time_new_now_local();
     } else {