From c7431755f878b513955603950aa314fc4a05c086 Mon Sep 17 00:00:00 2001
From: Sylvester Kaczmarek
 <16242628+sylvesterkaczmarek@users.noreply.github.com>
Date: Sun, 30 Aug 2026 00:23:33 +0100
Subject: [PATCH] Fix Particles fuse negligible-weight status

---
 ssapy/particles.py      | 2 +-
 tests/test_particles.py | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/ssapy/particles.py b/ssapy/particles.py
index 2d7ed42e..632b0e10 100644
--- a/ssapy/particles.py
+++ b/ssapy/particles.py
@@ -255,7 +255,7 @@ def fuse(self, epoch_particles, verbose=False):
         # Update the weight values by 'cross-pollinating' epoch likelihoods
         status = self.reweight(epoch_particles)
         # Check that we have at least some non-zero weights for particles
-        if status > 0 and verbose:
+        if not status and verbose:
             print("All weights are negligible in Particles class")
             print("\tlog-norm:",np.logaddexp.reduce(self.ln_wts))
         # Resample the weights to maintain only significant particles
diff --git a/tests/test_particles.py b/tests/test_particles.py
index 2960ad4e..7ec6a32c 100644
--- a/tests/test_particles.py
+++ b/tests/test_particles.py
@@ -186,4 +186,8 @@ def shrink_resample(particles_arg, ln_weights_arg, pod=False):
     monkeypatch.setattr(particles, "reweight", lambda epoch_particles: True)
     monkeypatch.setattr(particles, "resample", lambda num_particles: None)
     particles.fuse(particles, verbose=True)
+    assert "All weights are negligible" not in capsys.readouterr().out
+
+    monkeypatch.setattr(particles, "reweight", lambda epoch_particles: False)
+    particles.fuse(particles, verbose=True)
     assert "All weights are negligible" in capsys.readouterr().out