import { CustomError } from './custom-error';
/**
 * The results of a shallow-render query.
 *
 * This will contain either a single `TMatch` OR an Array of `TMatch`. Your test
 * must give proper treatment to the result based on the expected results.
 *
 * If your query is expected to have multiple matches, you *must* treat your results
 * as an Array or you will recieve errors when accessing properties on your results.
 *
 * You may treat a single result as an array but you cannot treat an array of results as a single result.
 *
 * For example, if your test expects a single result, you may treat the result as a `DebugElement` or an array of `DebugElement`s with one entry.
 *
 * @example
 * expect(find('h1.large').nativeElement.textContent).toBe('Foo');
 *
 * // If your query results in multiple matches, you may iterate over the matches but if you attempt
 * // to treat the collection of matches as a single match, the test will fail due to a mismatched
 * // usage of the query results in the test.
 *
 * // This would throw an error if the query resulted in multiple matches
 * expect(find('h1.large').nativeElement.textContent).toBe('Foo');
 *
 * const results = find('h1.large');
 * expect(results.length).toBe(3);
 * expect(results.map(result => result.nativeElement.textContent)).toEqual([
 *   'Foo',
 *   'Bar',
 *   'Baz'
 * ])
 *
 * @link https://getsaf.github.io/shallow-render/#querying
 */
export type QueryMatch<TMatch> = TMatch[] & TMatch;
export declare class NoMatchesError extends CustomError {
    constructor(propertyName: string);
}
export declare class MultipleMatchesError extends CustomError {
    constructor(propertyName: string, matchLength: number);
}
export declare function createQueryMatch<TMatch>(matches: TMatch[]): QueryMatch<TMatch>;