/**
 * Mock-implementation of DOMRectReadOnly.
 * Useful for unit testing.
 */
export declare class DOMRectReadOnlyMock implements DOMRectReadOnly {
    /** @inheritdoc */
    readonly bottom: number;
    /** @inheritdoc */
    readonly height: number;
    /** @inheritdoc */
    readonly left: number;
    /** @inheritdoc */
    readonly right: number;
    /** @inheritdoc */
    readonly top: number;
    /** @inheritdoc */
    readonly width: number;
    /** @inheritdoc */
    readonly x: number;
    /** @inheritdoc */
    readonly y: number;
    /** @inheritdoc */
    constructor(x?: number | undefined, y?: number | undefined, width?: number | undefined, height?: number | undefined);
    /** @inheritdoc */
    toJSON(): any;
}