import type { TestResultSummary } from '@duckcodeailabs/dql-project';
/**
 * A block test assertion parsed from DQL `tests { assert ... }` blocks.
 */
export interface BlockTestAssertion {
    name: string;
    sql: string;
    operator: '>' | '<' | '>=' | '<=' | '==' | '!=' | 'IN';
    threshold: number | string | boolean | Array<number | string | boolean>;
}
/**
 * QueryExecutor is an adapter interface for running SQL queries.
 * Implementations can use DuckDB, Postgres, etc.
 */
export interface QueryExecutor {
    execute(sql: string, params?: Record<string, unknown>): Promise<Record<string, unknown>[]>;
}
/**
 * TestRunner executes block test assertions against a database.
 */
export declare class TestRunner {
    private executor;
    constructor(executor: QueryExecutor);
    /**
     * Run all assertions for a block and return a summary.
     */
    runTests(assertions: BlockTestAssertion[], params?: Record<string, unknown>): Promise<TestResultSummary>;
    /**
     * Run a single assertion.
     */
    private runAssertion;
}
//# sourceMappingURL=test-runner.d.ts.map