148 lines
3.0 KiB
Java
148 lines
3.0 KiB
Java
package dev.kske.undoredo.core;
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import static org.junit.jupiter.api.Assertions.*;
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import org.junit.jupiter.api.*;
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/**
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* @author Kai S. K. Engelbart
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* @since 0.0.1
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*/
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class ChangeManagerTest {
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ChangeManager<IntChange> manager;
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IntWrapper wrapper;
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IntChange change;
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@BeforeEach
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void prepareChangeManager() {
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manager = new UnlimitedChangeManager<>();
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wrapper = new IntWrapper();
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change = new IntChange(wrapper, 1);
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}
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/**
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* Tests adding a change.
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*
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* @since 0.0.1
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*/
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@Test
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@Order(10)
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void testAddChange() {
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assertSame(0, wrapper.value);
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assertTrue(manager.addChange(change));
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assertSame(1, wrapper.value);
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}
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/**
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* Tests whether identity changes are ignored when adding them to the change manager.
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*
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* @since 0.0.1
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*/
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@Test
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@Order(15)
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void testDiscardIdentity() {
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manager.addChange(change);
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assertFalse(manager.addChange(new IntChange(wrapper, 0)));
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assertSame(1, wrapper.value);
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}
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/**
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* Tests retrieving the last change.
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*
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* @since 0.0.1
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*/
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@Test
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@Order(20)
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void testLastChange() {
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assertTrue(manager.getLastChange().isEmpty());
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manager.addChange(change);
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assertEquals(change, manager.getLastChange().get());
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}
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/**
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* Tests the consistency of the change list.
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*
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* @since 0.0.1
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*/
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@Test
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@Order(30)
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void testGetChanges() {
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assertTrue(manager.getChanges().isEmpty());
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manager.addChange(change);
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assertSame(1, manager.getChanges().size());
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assertEquals(change, manager.getChanges().get(0));
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}
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/**
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* Test undoing a change.
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*
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* @since 0.0.1
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*/
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@Test
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@Order(40)
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void testUndo() {
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assertFalse(manager.isUndoAvailable());
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assertFalse(manager.undo());
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manager.addChange(change);
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assertTrue(manager.isUndoAvailable());
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assertTrue(manager.undo());
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assertFalse(manager.isUndoAvailable());
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assertFalse(manager.undo());
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assertTrue(manager.getLastChange().isEmpty());
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}
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/**
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* Tests redoing a change.
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*
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* @since 0.0.1
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*/
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@Test
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@Order(50)
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void testRedo() {
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assertFalse(manager.isRedoAvailable());
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assertFalse(manager.redo());
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manager.addChange(change);
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assertFalse(manager.isRedoAvailable());
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assertFalse(manager.redo());
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manager.undo();
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assertTrue(manager.isRedoAvailable());
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assertTrue(manager.redo());
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assertFalse(manager.isRedoAvailable());
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assertFalse(manager.redo());
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assertEquals(change, manager.getLastChange().get());
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}
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/**
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* Tests whether the changes after the current index are discarded when adding a change.
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*
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* @since 0.0.1
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*/
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@Test
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@Order(55)
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void testDiscardDivergentHistory() {
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manager.addChange(change);
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manager.undo();
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assertTrue(manager.addChange(new IntChange(wrapper, 2)));
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assertFalse(manager.isRedoAvailable());
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assertSame(2, wrapper.value);
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}
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/**
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* Tests marking a change.
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*
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* @since 0.0.1
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*/
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@Test
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@Order(60)
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void testMark() {
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assertTrue(manager.isAtMarkedIndex());
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manager.addChange(change);
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assertFalse(manager.isAtMarkedIndex());
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manager.mark();
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assertTrue(manager.isAtMarkedIndex());
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manager.undo();
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assertFalse(manager.isAtMarkedIndex());
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}
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}
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