/**
 * Shared test helpers for openapi-zod-ts unit tests.
 *
 * Extracted to avoid duplicating boilerplate across test files.
 * Import with the .js extension as required by NodeNext module resolution:
 *   import { compileFiles, compileSingleFile, makeSpec } from './helpers.js'
 */
import ts from 'typescript';
import type { OpenAPIV3_1 } from 'openapi-types';
/**
 * Build a minimal valid OpenAPI 3.1.0 document, optionally merged with
 * caller-supplied overrides. The merge is shallow at the top level and one
 * level deep for `paths` and `components`.
 *
 * Use this to keep per-test spec literals focused on the delta rather than
 * repeating the same boilerplate skeleton in every file.
 */
export declare function makeSpec(overrides?: Partial<OpenAPIV3_1.Document>): OpenAPIV3_1.Document;
/**
 * Compile multiple in-memory TypeScript files together using the TypeScript
 * compiler API. Files are keyed by bare names (e.g. 'models.ts') and stored
 * under /virtual/. Relative imports between virtual files are resolved via
 * resolveModuleNameLiterals.
 *
 * Returns only diagnostics that belong to the virtual files (i.e. errors in
 * lib.d.ts or node_modules are excluded).
 */
export declare function compileFiles(files: Record<string, string>): readonly ts.Diagnostic[];
/**
 * Compile a single in-memory TypeScript source string. Use this for tests
 * that verify a standalone generated file (e.g. models.ts, client-config.ts)
 * without needing cross-file imports.
 *
 * The `lib` option defaults to ['ES2022']. Pass `{ lib: ['ES2022', 'DOM'] }`
 * when the generated file uses browser globals (e.g. RequestInit, fetch).
 */
export declare function compileSingleFile(filename: string, source: string, opts?: {
    lib?: string[];
}): readonly ts.Diagnostic[];
/**
 * Assert that a TypeScript compilation produced no diagnostics. Throws a
 * descriptive error listing all messages when diagnostics are present.
 *
 * @param diagnostics - result from compileFiles or compileSingleFile
 * @param context - short label for the error message, e.g. "generated models.ts"
 */
export declare function assertNoTsDiagnostics(diagnostics: readonly ts.Diagnostic[], context: string): void;
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