feat(reliability): supervisor sampling, event feed, boot marker

tests/test_health.py

@@ -139,5 +139,38 @@ class HealthCheckTest(unittest.TestCase):
         self.assertIn('pool_disabled', payload)
 
 
+class SupervisorExtrasTest(unittest.TestCase):
+    def runTestWith(self):  # helper: reuse existing setUp fake_run
+        pass
+
+    def test_mem_percent_math(self):
+        import tempfile
+        content = 'MemTotal:  250000 kB\nMemAvailable: 100000 kB\n'
+        path = tempfile.mktemp()
+        open(path, 'w').write(content)
+        self.assertEqual(server._mem_percent(path), 60)
+
+    def test_health_reports_events_and_counters(self):
+        import mk8_events
+        mk8_events.log_event('restart', msg='x')
+        status, h = server.h_health(None)
+        self.assertEqual(status, 200)
+        self.assertIn('events', h)
+        self.assertIn('boots', h['reliability'])
+
+    def test_boot_marker_detects_unexpected(self):
+        import mk8_events, tempfile, os
+        marker = tempfile.mktemp()
+        old = server.BOOT_MARKER
+        server.BOOT_MARKER = marker
+        try:
+            open(marker, 'w').write('0')
+            self.assertTrue(server.check_boot_marker())
+            os.unlink(marker)
+            self.assertFalse(server.check_boot_marker())
+        finally:
+            server.BOOT_MARKER = old
+
+
 if __name__ == '__main__':
     unittest.main()