import { Readable, Writable } from "node:stream";
import type { CommonArgs } from "./commonArgs";
import type { CommandDeps } from "./types";
import type { LoadResult, StoredEntry, TokenStore } from "../oauth/tokenStore";
import type { TokenSet } from "../oauth/tokenResponse";
/** A `Writable` that accumulates everything written into a string. */
export interface CapturedStream extends Writable {
    /** Concatenation of every chunk written to the stream so far. */
    readonly value: string;
}
/**
 * Returns a `Writable` that records every write into a string for
 * assertion. Reads via `.value`. Defined as a real `Writable`
 * subclass so it can be passed straight into `CommandDeps.stdout` /
 * `CommandDeps.stderr` without casts.
 */
export declare function captureStream(): CapturedStream;
/** Convenience: an empty `Readable` to stand in for stdin in tests. */
export declare function emptyStdin(): Readable;
/** A `TokenStore` plus instrumentation for assertions. */
export interface FakeStore extends TokenStore {
    /** Number of times `load()` was called. */
    readonly loadedTimes: number;
    /** Number of times `clear()` was called. */
    readonly clearedTimes: number;
    /** Current state, observable from tests. */
    readonly current: LoadResult;
}
/**
 * In-memory `TokenStore` that starts in `initial`, accepts
 * `save()` / `clear()`, and exposes `loadedTimes` / `clearedTimes`
 * / `current` for assertions.
 */
export declare function makeStore(initial: LoadResult): FakeStore;
/**
 * Builds a `StoredEntry` for the standard test issuer/client. Pass a
 * `TokenSet` (from a per-test fixture) and override the
 * issuer/client/insecure fields when a test cares about them.
 */
export declare function entry(tokens: TokenSet, overrides?: Partial<Omit<StoredEntry, "tokens">>): StoredEntry;
/** A `CommandDeps` shape with the captured streams exposed. */
export interface CapturedDeps extends CommandDeps {
    stdout: CapturedStream;
    stderr: CapturedStream;
}
/** Returns a `CommandDeps` populated with capturing streams. */
export declare function captureDeps(overrides?: Partial<CapturedDeps>): CapturedDeps;
/**
 * Returns a fully-resolved `CommonArgs` for the standard test
 * issuer/client. Override individual fields as needed.
 */
export declare function commonArgs(overrides?: Partial<CommonArgs>): CommonArgs;