import type { RenderAdapter, RenderProps } from "./render-seam.js";
/** Framework-specific values that let the shared conformance module exercise a render adapter. */
export interface RenderAdapterConformanceFixture {
    /** A page that renders the `page`, `data`, and `pending` markers from the supplied props. */
    readonly page: unknown;
    /** The outer layout, which renders `markers.outer` before its child. */
    readonly outerLayout: unknown;
    /** The inner layout, which renders `markers.inner` before its child. */
    readonly innerLayout: unknown;
    /** Props passed to the page. Use values represented by the `data` and `pending` markers. */
    readonly props: RenderProps;
    /**
     * Set when the fixture renders **deferred/streaming-only** content (e.g. Suspense that resolves during
     * the stream). Streaming and buffered (`renderToString`) output then legitimately differ byte-for-byte,
     * so the hydration-equivalence check is relaxed to "buffered output still contains every marker" instead
     * of exact equality. Leave unset for plain synchronous content (the stricter, preferred check).
     */
    readonly deferred?: boolean;
    /** Unique text fragments observable in the rendered HTML. */
    readonly markers: {
        readonly page: string;
        readonly data: string;
        readonly pending: string;
        readonly outer: string;
        readonly inner: string;
    };
}
/** A failed invariant reported by {@link assertRenderAdapterConformance}. */
export declare class RenderAdapterConformanceError extends Error {
    readonly check: string;
    constructor(check: string, message: string, cause?: unknown);
}
/**
 * Execute the observable {@link RenderAdapter} interface against a framework-specific fixture.
 *
 * The promise resolves only when the adapter proves all shared invariants: page props reach a
 * page-only render, streams contain byte chunks, layout chains nest outermost-first, optional
 * buffered rendering is byte-for-byte hydration-equivalent to streaming for non-deferred content,
 * and hydration-head output is a stable string. It rejects with
 * {@link RenderAdapterConformanceError} naming the first failed check.
 *
 * Framework semantics outside the interface-Suspense scheduling, compiler plugins, DOM hydration,
 * error boundaries, and framework-specific primitives-remain the adapter package's local tests.
 */
export declare function assertRenderAdapterConformance(adapter: RenderAdapter, fixture: RenderAdapterConformanceFixture): Promise<void>;
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