declare class MockDataTransferItem implements DataTransferItem {
    readonly kind: string;
    readonly type: string;
    readonly _entry: FileSystemEntry | null;
    readonly _children: DataTransferItem[];
    constructor(kind: string, type: string, _entry?: FileSystemEntry | null, _children?: DataTransferItem[]);
    webkitGetAsEntry(): FileSystemEntry | null;
    getAsFile(): File | null;
    getAsString(_callback: (data: string) => void): void;
}
export declare function mockFile(name: string): MockDataTransferItem;
export declare function mockNonFileOrDir(name: string): MockDataTransferItem;
export declare function mockString(): MockDataTransferItem;
export declare function mockDir(name: string, children: DataTransferItem[]): MockDataTransferItem;
export declare function mockTransfer(items: DataTransferItem[]): DataTransfer;
export declare function simulateNoItemsSupport(transfer: DataTransfer): DataTransfer;
export declare function simulateNoWebkitGetAsEntrySupport(transfer: DataTransfer): DataTransfer;
export declare function simulateWebkitGetAsEntryReturnsNull(transfer: DataTransfer): DataTransfer;
export declare function simulateFileReadError(item: DataTransferItem, error: DOMException): DataTransferItem;
export declare function simulateDirReadError(item: DataTransferItem, error: DOMException): DataTransferItem;
export {};