fix maude_decom.filter_vcdu_jumps to handle repeated frames (and adde…

…d test case)

(last_frame was not being used)

chandra_aca/maude_decom.py

@@ -611,11 +611,13 @@ def filter_vcdu_jumps(vcdu_counters):
         - VCDU counters come in packets of four, with each group starting with a multiple of 4.
     """
     current_packet = []  # to group in fours
-    last_frame = 0  # for monotonicity check
+    last_frame = -1  # for monotonicity check
     selected = np.zeros(len(vcdu_counters), dtype=bool)
     for i, vcdu_counter in enumerate(vcdu_counters):
-        if last_frame > vcdu_counter:
+        if last_frame >= vcdu_counter:
+            last_frame = vcdu_counter
             continue
+        last_frame = vcdu_counter
         if vcdu_counter % 4 == 0:
             current_packet = []
         current_packet.append(i)

chandra_aca/tests/test_maude_decom.py

@@ -806,6 +806,10 @@ def test_repeated_frames():
 
 def test_filter_vcdu_jumps():
     filter_vcdu_test_cases = [
+        {
+            "inp": np.array([1, 2, 3, 4, 5, 6, 6, 7, 8, 9]),
+            "exp": np.array([4, 5, 6, 7]),
+        },
         {"inp": np.array([1, 2, 3, 4, 5, 6, 7, 8, 9]), "exp": np.array([4, 5, 6, 7])},
         {"inp": np.array([0, 2, 3, 4, 5, 6, 7, 8, 9]), "exp": np.array([4, 5, 6, 7])},
         {"inp": np.array([0, 1, 3, 4, 5, 6, 7, 8, 9]), "exp": np.array([4, 5, 6, 7])},