xtc/tests/integration/README.md

Integration tests

make test is hardware/server independent: offline render tests, concurrent plan-replacement stress, and (when JACK headers are present) JACK ABI fault injection. The fake links against installed declarations without linking libjack. It does not claim to reproduce JACK scheduling; the separate threaded stress test exercises publication/reclamation.

make test-jack explicitly runs a five-second live JACK loopback test. Requires an existing JACK or PipeWire JACK-compatible server; does not start a server, change its sample rate/block size, or connect physical outputs. Source output is connected only to the test's capture client, then disconnected and removed. It checks finite/bounded captured samples at two gains, active plan replacement, status and ten restart cycles. For a longer run:

make build/test_jack
./build/test_jack 30

On the inspected system the 30-second test passed at 48000 Hz (initial 1024 frames): 704 engine blocks, 716 probe blocks, both gains observed, zero xruns, and ten restart cycles. This is a limited software-loopback result, not an endurance or physical-device qualification. No live server termination or global format change is performed on the shared server. Those paths, missing server, port/callback setup failure, activation/deactivation/close failure, null buffers, invalid configuration, oversize buffers, and reopen are tested with injected JACK callbacks/results in tests/unit/test_backend.c.

FLTK shell tests

make gui test-gui
# Optional, requires a running JACK-compatible server:
make test-gui-jack

These targets require FLTK development files, xvfb-run and Xvfb. No additional GUI test library is needed. test_gui.cpp uses real widgets, menus and timers with a fake public C backend. It covers Play/Stop/Reconnect, view switching, persistent startup/control errors, server loss/rate changes, partial handles, close-failure retry and timer removal. All 18 opened handles are closed. test_gui_jack.cpp uses the real backend, repeats start/stop nine times across three windows, reconnects, and closes each window while running. No audio ports are connected. Both tests passed on the inspected host.

A separate xdotool smoke run against build/xtc under a 1280x800 Xvfb display exercised F5/F8/F6, Space, Ctrl+1/2/3 and Ctrl+Q. The app exited successfully; visual inspection confirmed running status and mixer view switching.

Clang ASan/UBSan found no application errors in the GUI tests. The unsuppressed run reports exit-time allocations originating in the installed fontconfig library used by FLTK/Pango. lsan.supp narrowly suppresses that library; leak checking stays enabled for application allocations. This is not a claim that the third-party font stack is leak-free. Apply only to GUI sanitizer tests:

LSAN_OPTIONS=suppressions=tests/integration/lsan.supp xvfb-run -a -s '-screen 0 1280x800x24' ./build/gui-sanitize/test_gui

Build that binary with Clang/Clang++, -fsanitize=address,undefined in both CFLAGS/CXXFLAGS and LDFLAGS, using the baseline warning/include/standard flags from BUILD.md. Keep FLTK's -I and -D flags from fltk-config --cxxflags, but exclude the distribution's GCC-specific LTO/object-code flags for Clang. No suppressions are used for core/backend/realtime sanitizer tests.