Fix MappedBackedList handling of wasUpdated changes

src/main/java/com/tobiasdiez/easybind/MappedBackedList.java

@@ -45,8 +45,8 @@ protected void sourceChanged(ListChangeListener.Change<? extends F> change) {
                 }
                 nextPermutation(from, to, permutation);
             } else if (change.wasUpdated()) {
-                backingList.set(change.getFrom(), mapper.apply(getSource().get(change.getFrom())));
-                nextUpdate(change.getFrom());
+                E old = backingList.set(change.getFrom(), mapper.apply(getSource().get(change.getFrom())));
+                nextSet(change.getFrom(), old);
             } else {
                 if (change.wasRemoved()) {
                     int removePosition = change.getFrom();

src/test/java/com/tobiasdiez/easybind/MappedBackedListTest.java

@@ -0,0 +1,31 @@
+package com.tobiasdiez.easybind;
+
+import javafx.beans.Observable;
+import javafx.beans.property.IntegerProperty;
+import javafx.beans.property.SimpleIntegerProperty;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+import javafx.collections.transformation.SortedList;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class MappedBackedListTest {
+
+    @Test
+    public void testSortedListUpdatesWithMappedBackedList() {
+        ObservableList<IntegerProperty> list = FXCollections.observableArrayList(number -> new Observable[]{number});
+        ObservableList<Integer> mappedList = EasyBind.mapBacked(list, IntegerProperty::get);
+        SortedList<Integer> sortedList = new SortedList<>(mappedList);
+
+        IntegerProperty number = new SimpleIntegerProperty(1);
+        list.add(number);
+
+        assertEquals(1, sortedList.get(0));
+
+        number.set(2);
+
+        assertEquals(2, sortedList.get(0));
+    }
+}