freeCodeCamp/curriculum/challenges/english/06-quality-assurance/quality-assurance-and-testing-with-chai/test-for-truthiness.md

id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
587d824b367417b2b2512c49	Test for Truthiness	2	301596	test-for-truthiness

--description--

As a reminder, this project is being built upon the following starter project on Replit, or cloned from GitHub.

isTrue() will test for the boolean value true and isNotTrue() will pass when given anything but the boolean value of true.

assert.isTrue(true, 'this will pass with the boolean value true');
assert.isTrue('true', 'this will NOT pass with the string value "true"');
assert.isTrue(1, 'this will NOT pass with the number value 1');

isFalse() and isNotFalse() also exist, and behave similarly to their true counterparts except they look for the boolean value of false.

--instructions--

Within tests/1_unit-tests.js under the test labelled #4 in the Basic Assertions suite, change each assert to either assert.isTrue or assert.isNotTrue to make the test pass (should evaluate to true). Do not alter the arguments passed to the asserts.

--hints--

All tests should pass.

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
    (data) => {
      assert.equal(data.state, 'passed');
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

You should choose the correct method for the first assertion - isTrue vs. isNotTrue.

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
    (data) => {
      assert.equal(data.assertions[0].method, 'isTrue', 'True is true');
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

You should choose the correct method for the second assertion - isTrue vs. isNotTrue.

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
    (data) => {
      assert.equal(
        data.assertions[1].method,
        'isTrue',
        'Double negation of a truthy value is true'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

You should choose the correct method for the third assertion - isTrue vs. isNotTrue.

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=3').then(
    (data) => {
      assert.equal(
        data.assertions[2].method,
        'isNotTrue',
        'A truthy object is not true - neither is a false one'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

--solutions--

/**
  Backend challenges don't need solutions, 
  because they would need to be tested against a full working project. 
  Please check our contributing guidelines to learn more.
*/