P4-01: commit feature tasks to document history

tests/facade.test.ts

@@ -71,3 +71,24 @@ test('document mutations use the facade history boundary', () => {
   facade.history.redo()
   assert.equal(facade.app.document.getActive().label, 'Untitled document')
 })
+
+test('Part Design feature tasks commit a document object and remain undoable', () => {
+  const facade = createMockFacade()
+  const before = facade.app.document.getActive()
+  facade.gui.command.execute({ commandId: 'pad' })
+  assert.equal(facade.task.getActive()?.commandId, 'pad')
+  facade.task.update({ length: 42, reversed: false })
+  facade.task.apply()
+
+  const committed = facade.app.document.getActive()
+  const created = committed.tree.find((item) => item.id === 'pad001')
+  assert.equal(created?.label, 'Pad')
+  assert.equal(committed.version, before.version + 1)
+  assert.equal(facade.selection.getObjectId(), 'pad001')
+  assert.equal(committed.dirty, true)
+
+  facade.history.undo()
+  assert.equal(facade.app.document.getActive().tree.some((item) => item.id === 'pad001'), false)
+  facade.history.redo()
+  assert.equal(facade.app.document.getActive().tree.some((item) => item.id === 'pad001'), true)
+})