alsatian-test/alsatian

import { FunctionSpy } from "./function-spy";
import { exposeSpyFunctions } from "./expose-spy-functions";
import { ISpiedFunction, TypedFunction } from "./spied-function.i";

export function createFunctionSpy<FunctionType extends TypedFunction>(): ISpiedFunction<FunctionType>;
export function createFunctionSpy<
    ArgumentType,
    ReturnType
>(): ISpiedFunction<(...args: Array<ArgumentType>) => ReturnType>;
export function createFunctionSpy() {
    const functionSpy = new FunctionSpy();

    const spiedFunction = functionSpy.call.bind(functionSpy);

    exposeSpyFunctions(spiedFunction as ISpiedFunction<any>, functionSpy);

    return spiedFunction;
}