feat: truly silent test output on pass; hex dump preserved on failure

- conftest.py: suppress dots, progress bar, summary via pytest hooks
  - pytest_report_teststatus: return ('passed', '', '') to hide dots
  - pytest_sessionstart: monkey-patch terminalreporter methods after init
  - Only show summary_stats when failures exist
- Makefile: @ prefix for silent recipe; -W ignore::UserWarning
- test_all.py: filter UserWarning in __main__ block

Verified: 336 tests pass silently (zero stdout); failure shows full hex dump.

Author: peng.li24

tests/conftest.py

@@ -1 +1,33 @@
-"""Silent test runner: no per-test PASSED lines; failures show hex dump."""
+"""Truly silent on pass: no dots, no progress bar, no summary.
+On failure: full hex dump traceback.
+
+Usage: pytest tests/test_all.py -q --tb=short --no-header
+"""
+
+
+def pytest_report_teststatus(report, config):
+    """Suppress dots for passed tests."""
+    if report.when == "call":
+        if report.passed:
+            return "passed", "", ""
+        if report.failed:
+            return "failed", "F", ""
+
+
+def pytest_sessionstart(session):
+    """Override terminal reporter methods after it is fully configured."""
+    tr = session.config.pluginmanager.getplugin("terminalreporter")
+    if tr is None:
+        return
+
+    # Suppress progress bar
+    if hasattr(tr, '_write_progress_information_filling_space'):
+        tr._write_progress_information_filling_space = lambda: None
+
+    # Suppress summary line on pass (keep on failure)
+    if hasattr(tr, 'summary_stats'):
+        orig = tr.summary_stats
+        def _summary_stats():
+            if tr.stats.get("failed"):
+                orig()
+        tr.summary_stats = _summary_stats

tests/test_all.py

@@ -1191,6 +1191,7 @@ def test_ij_ij_to_i(self, cpp, dtype, n, dims):
 
 
 if __name__ == "__main__":
-    import sys, os
+    import sys, os, warnings
+    warnings.filterwarnings("ignore", category=UserWarning)
     sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
     sys.exit(pytest.main([__file__, "-q", "--tb=short", "--no-header"]))