index.test.js

function equal(actual, expected, message) {
  if (actual === expected) {
    const defaultMessage = `Expected ${expected} and received ${actual}`;
    console.info("Pass: " + (message || defaultMessage));
  } else {
    const defaultMessage = `Expected ${expected} but received ${actual} instead`;
    console.error("Fail: " + (message || defaultMessage));
  }
}

function test(name, testFunction) {
  console.group(name);
  testFunction();
  console.groupEnd(name);
}

// FIRST TESTS//
//Add tasks to a list so that I can keep track of them
test("Submitting a new task adds it to the list", () => {
  const result = addTask([], "item");
  console.log("Actual result:", result);
  equal(result.length, 1, "Submitting a new task adds it to the list");
});

//SECOND TESTS//
// Check things off my list so that I can see what I’ve done
test("Checking an entry marks it as complete", () => {
  const result = taskDone(checkbox);
  equal(result, true);
});

// THIRD TESTS//
// Delete things from the list if I don’t need to do them anymore
test("Deleting an entry removes it from the list", () => {
  const result = [1, 2, 3].splice(0);
  equal(result.length, 2);
  // return result.length;
});

// FOURTH TESTS//
// filter hides completed to-do's
test("Toggling the filter hides completed tasks from the list", () => {
  const taskList = {
    tasks: [{ completed: true }, { completed: false }],
  };

  let result = JSON.stringify(taskList.tasks.filter((task) => !task.completed));
  console.log(result);
  equal(result, JSON.stringify([{ completed: false }]));
});