Add change manager unmarking

core/src/main/java/dev/kske/undoredo/core/ChangeManager.java

@@ -55,11 +55,18 @@ public interface ChangeManager<C extends Change> {
 	 */
 	void mark();
 
+	/**
+	 * Resets the marked index so that no change is marked.
+	 *
+	 * @since 0.0.1
+	 */
+	void unmark();
+
 	/**
 	 * @return whether the current change is marked
 	 * @since 0.0.1
 	 */
-	boolean isAtMarkedIndex();
+	boolean isAtMarkedChange();
 
 	/**
 	 * @return whether a change is present that can be undone

core/src/main/java/dev/kske/undoredo/core/UnlimitedChangeManager.java

@@ -53,7 +53,12 @@ public final class UnlimitedChangeManager<C extends Change> implements ChangeMan
 	}
 
 	@Override
-	public boolean isAtMarkedIndex() {
+	public void unmark() {
+		markedIndex = -1;
+	}
+
+	@Override
+	public boolean isAtMarkedChange() {
 		return markedIndex == index;
 	}
 

core/src/test/java/dev/kske/undoredo/core/ChangeManagerTest.java

@@ -108,12 +108,28 @@ class ChangeManagerTest {
 	@Test
 	@Order(60)
 	void testMark() {
-		assertTrue(manager.isAtMarkedIndex());
+		assertTrue(manager.isAtMarkedChange());
 		manager.addChange(change);
-		assertFalse(manager.isAtMarkedIndex());
+		assertFalse(manager.isAtMarkedChange());
 		manager.mark();
-		assertTrue(manager.isAtMarkedIndex());
+		assertTrue(manager.isAtMarkedChange());
 		manager.undo();
-		assertFalse(manager.isAtMarkedIndex());
+		assertFalse(manager.isAtMarkedChange());
+	}
+
+	/**
+	 * Tests unmarking a change.
+	 *
+	 * @since 0.0.1
+	 */
+	@Test
+	@Order(70)
+	void testUnmark() {
+		manager.addChange(change);
+		manager.mark();
+		manager.unmark();
+		assertFalse(manager.isAtMarkedChange());
+		manager.undo();
+		assertTrue(manager.isAtMarkedChange());
 	}
 }