Checking the length of the array

The project for this lesson contains a function called searchPeople, which returns matched people objects in an array for some criteria. A test has been partially implemented that checks whether the correct array is returned when a first name is passed as the criteria.

A copy of the starter project is in the code widget below:

const people = [
  {
    id: 1,
    firstName: "Bill",
    lastName: "Peters",
  },
  {
    id: 2,
    firstName: "Jane",
    lastName: "Sheers",
  },
];

function wait(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

export async function searchPeople(criteria) {
  await wait(200);
  const found = people.filter(
    (p) =>
      p.firstName.toLowerCase().indexOf(criteria.toLowerCase()) > -1 ||
      p.lastName.toLowerCase().indexOf(criteria.toLowerCase()) > -1
  );
  return found;
}

Partially implemented test

Introduction

Getting Started with Jest

Using Matchers

Getting Started with React Testing Library

React Testing Library Queries

Firing Events

Mocking

Testing Different Types of Components

Appendix

Checking Arrays

Checking the length of the array