> A Future is a placeholder object for a value that may not yet exist
npm install fp-future> A Future is a placeholder object for a value that may not yet exist
``bash`
npm install fp-future
It is useful for blackbox testing without weird injections and other things.
`ts
it("executes the callback", async () => {
const somethingToBeResolved = future();
entity.onClick(event => {
somethingToBeResolved.resolve(event);
});
const nonce = Math.random();
setTimeout(() => somethingToBeResolved.reject(new Error("timeout")), 1000);
entityEngine.triggerClick(nonce);
const receivedNonce = await somethingToBeResolved;
expect(receivedNonce).toEq(nonce);
});
``