Update ledger/chainsync_test.go

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Signed-off-by: Chris Gianelloni <wolf31o2@gmail.com>

Author: wolf31o2

ledger/chainsync_test.go

@@ -366,17 +366,10 @@ func TestCalculateEpochNonce_ZeroActiveSlots(t *testing.T) {
 		},
 	}
 
-	// Zero active slots coefficient should cause division by zero error
-	_, err := ls.calculateEpochNonce(nil, 86400)
-	if err == nil {
-		t.Error("expected error for zero active slots coefficient, got nil")
-	}
-	if !strings.Contains(err.Error(), "divide by zero") &&
-		!strings.Contains(err.Error(), "ActiveSlotsCoeff") {
-		t.Errorf(
-			"expected error about division by zero or ActiveSlotsCoeff, got: %v",
-			err,
-		)
+	// Verify fallback behavior when ActiveSlotsCoeff cannot be used
+	window := ls.calculateStabilityWindow()
+	if window != blockfetchBatchSlotThresholdDefault {
+		t.Fatalf("expected fallback window %d, got %d", blockfetchBatchSlotThresholdDefault, window)
 	}
 }