Function finish

tests/binance-ws-api-userdata.test.ts:515–521

(err?: Error)

            let finished = false;

            const finish = (err?: Error) => {
                if (finished) return;
                finished = true;
                stopWsApiConnections(true);
                if (err) return done(err);
                done();
            };

            const checkCompletion = () => {
                if (executionReceived && balanceReceived && subscriptionReady) {