/**
 * Shared test utilities for Storybook tests
 * These utilities work with the virtualized cell-based DOM structure
 */
/**
 * Get unique row count from virtualized cells
 * Since column virtualization removed .st-row wrappers, we count unique data-row-index values
 */
export declare const getRowCount: (container: HTMLElement) => number;
/**
 * Get all cells for a specific row index
 */
export declare const getCellsForRow: (container: HTMLElement, rowIndex: string) => HTMLElement[];
/**
 * Get all unique row indices from rendered cells
 */
export declare const getUniqueRowIndices: (container: HTMLElement) => number[];
/**
 * Check if a row exists (has any cells rendered)
 */
export declare const rowExists: (container: HTMLElement, rowIndex: string) => boolean;
/**
 * Get row elements as virtual rows (groups cells by row index)
 * This mimics the old .st-row structure for backward compatibility with tests
 */
export declare const getVirtualRows: (container: HTMLElement) => HTMLElement[][];
export declare const waitForTable: (timeout?: number) => Promise<void>;
/** Poll until predicate returns true or timeout (reduces flake vs fixed setTimeout). */
export declare function waitUntil(predicate: () => boolean, options?: {
    timeoutMs?: number;
    intervalMs?: number;
}): Promise<void>;
export declare const validateBasicTableStructure: (canvasElement: HTMLElement) => Promise<void>;
export declare const validateColumnCount: (canvasElement: HTMLElement, expectedCount: number) => void;
export declare const validateRowCount: (canvasElement: HTMLElement, expectedCount: number) => void;
export declare const validateCellContent: (canvasElement: HTMLElement, rowIndex: number, accessor: string, expectedValue: string) => void;
/** Pinned panes should be document-ordered: left → main → right in header and body (when present). */
export declare const expectPinnedSectionsDomOrder: (root: HTMLElement) => void;