import { Fiber } from "@effect/core/io/Fiber/definition";
/**
 * @tsplus type effect/core/testing/TestClock.WarningData
 */
export type WarningData = Start | Pending | Done;
/**
 * `WarningData` describes the state of the warning message that is displayed
 * if a test is using time by is not advancing the `TestClock`. The possible
 * states are `Start` if a test has not used time, `Pending` if a test has
 * used time but has not adjusted the `TestClock`, and `Done` if a test has
 * adjusted the `TestClock` or the warning message has already been displayed.
 *
 * @tsplus type effect/core/testing/TestClock.WarningData.Ops
 */
export interface WarningDataOps {
}
export declare const WarningData: WarningDataOps;
export interface Start {
    readonly _tag: "Start";
}
export interface Pending {
    readonly _tag: "Pending";
    readonly fiber: Fiber<Error, void>;
}
export interface Done {
    readonly _tag: "Done";
}
/**
 * SState indicating that a test has not used time.
 * @tsplus static effect/core/testing/TestClock.WarningData.Ops Start
 * @tsplus location "@effect/core/testing/TestClock/_internal/WarningData"
 */
export declare const start: WarningData;
/**
 * State indicating that a test has used time but has not adjusted the
 * `TestClock` with a reference to the fiber that will display the warning
 * message.
 * @tsplus static effect/core/testing/TestClock.WarningData.Ops Pending
 * @tsplus location "@effect/core/testing/TestClock/_internal/WarningData"
 */
export declare function pending(fiber: Fiber<Error, void>): WarningData;
/**
 * State indicating that a test has used time or the warning message has
 * already been displayed.
 * @tsplus static effect/core/testing/TestClock.WarningData.Ops Done
 * @tsplus location "@effect/core/testing/TestClock/_internal/WarningData"
 */
export declare const done: WarningData;
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