Testability

test.js

// What are some things that make this code difficult to test, and how would you address them?

import { config } from "../constants/config";
import { sendRequest } from "../services/sendRequest";
import { notifications } from "../services/notifications";

export async function fetchUser(userModel) {
  const {
    server: {
      api: { baseUrl },
    },
  } = config;

  const {
    meta: { id },
  } = userModel;

  const method = "GET";
  const url = `${baseUrl}/users/${id}`;
  const startTime = Date.now();

  try {
    return {
      user: await sendRequest[method](url),
      roundTripTime: Date.now() - startTime,
    };
  } catch (e) {
    if (e.statusCode === 404) {
      notifications.showError(`User with ID ${id} does not exist`);
    }

    throw e;
  }
}