本文整理匯總了TypeScript中@dataservices/virtualization/view-editor/command/undo-redo/undo-manager.UndoManager.canUndo方法的典型用法代碼示例。如果您正苦於以下問題：TypeScript UndoManager.canUndo方法的具體用法？TypeScript UndoManager.canUndo怎麽用？TypeScript UndoManager.canUndo使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類@dataservices/virtualization/view-editor/command/undo-redo/undo-manager.UndoManager的用法示例。
在下文中一共展示了UndoManager.canUndo方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的TypeScript代碼示例。
示例1: it
it( "shouldHaveGoodInitialState", () => {
const undoMgr = new UndoManager();
expect( undoMgr.canRedo() ).toBe( false );
expect( undoMgr.canUndo() ).toBe( false );
expect( () => { undoMgr.peekRedoCommand(); } ).toThrow();
expect( () => { undoMgr.popRedoCommand(); } ).toThrow();
expect( () => { undoMgr.peekUndoCommand(); } ).toThrow();
expect( () => { undoMgr.popUndoCommand(); } ).toThrow();
expect( undoMgr.redoLabel() ).toBe( ViewEditorI18n.redoActionTooltip );
expect( undoMgr.toArray().length ).toBe( 0 );
expect( undoMgr.undoLabel() ).toBe( ViewEditorI18n.undoActionTooltip );
} );