/**
 * Mock localStorage for testing
 *
 * Provides a Map-backed implementation of the Storage interface
 * for testing localStorage-dependent code.
 *
 * @example
 * ```typescript
 * const storage = new MockLocalStorage();
 *
 * // Use as global localStorage
 * Object.defineProperty(globalThis, 'localStorage', { value: storage });
 *
 * // Or use directly
 * storage.setItem('key', 'value');
 * expect(storage.getItem('key')).toBe('value');
 *
 * // Check internal storage
 * expect(storage._store.get('key')).toBe('value');
 *
 * // Reset between tests
 * storage.clear();
 * ```
 */
/**
 * Mock implementation of the Storage interface
 */
export declare class MockLocalStorage implements Storage {
    /** Internal storage map */
    readonly _store: Map<string, string>;
    get length(): number;
    key(index: number): string | null;
    getItem(key: string): string | null;
    setItem(key: string, value: string): void;
    removeItem(key: string): void;
    clear(): void;
    /**
     * Get all keys in storage
     */
    keys(): string[];
    /**
     * Get all entries as an object
     */
    toObject(): Record<string, string>;
    /**
     * Populate storage from an object
     */
    fromObject(obj: Record<string, string>): void;
}
/**
 * Creates a mock localStorage instance
 *
 * @returns A new MockLocalStorage instance
 */
export declare function createMockLocalStorage(): MockLocalStorage;
/**
 * Sets up mock localStorage on globalThis
 *
 * @returns The mock localStorage instance (for assertions)
 */
export declare function setupLocalStorageMock(): MockLocalStorage;
/**
 * Mock implementation of sessionStorage
 * (Same interface as localStorage)
 */
export declare class MockSessionStorage extends MockLocalStorage {
}
/**
 * Creates a mock sessionStorage instance
 *
 * @returns A new MockSessionStorage instance
 */
export declare function createMockSessionStorage(): MockSessionStorage;
/**
 * Sets up mock sessionStorage on globalThis
 *
 * @returns The mock sessionStorage instance
 */
export declare function setupSessionStorageMock(): MockSessionStorage;
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