export declare const NO_SPEC_FUNCTION_ERROR = "You must provide a function as the second argument to Then(\"some label\", () => {} )";
export declare const CONTEXT_FOR_GWT_ERROR = "An error was thrown in";
export declare const NO_STACK_ERROR = "Unfortunately, this error was thrown as a string, \nso no *real* stack trace for you :(";
export interface DoneFn {
    (...args: Error[]): void;
    fail: (...args: Error[]) => void;
}
interface TestCallback {
    (done: DoneFn): any;
}
declare global {
    function Given(fn: TestCallback): void;
    function When(fn: TestCallback): void;
    function Then(label: string, fn: TestCallback): void;
    function Then(fn: TestCallback): void;
}
export {};
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