freeCodeCamp/curriculum/challenges/english/06-quality-assurance/quality-assurance-and-testing-with-chai/test-if-a-variable-or-function-is-defined.md

id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
587d824b367417b2b2512c47	Test if a Variable or Function is Defined	2	301602	test-if-a-variable-or-function-is-defined

--description--

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

--instructions--

Within tests/1_unit-tests.js under the test labelled #2 in the Basic Assertions suite, change each assert to either assert.isDefined() or assert.isUndefined() 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=1').then(
    (data) => {
      assert.equal(data.state, 'passed');
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

You should choose the correct method for the first assertion - isDefined vs. isUndefined.

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=1').then(
    (data) => {
      assert.equal(
        data.assertions[0].method,
        'isDefined',
        'Null is not undefined'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

You should choose the correct method for the second assertion - isDefined vs. isUndefined.

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=1').then(
    (data) => {
      assert.equal(
        data.assertions[1].method,
        'isUndefined',
        'Undefined is undefined'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

You should choose the correct method for the third assertion - isDefined vs. isUndefined.

(getUserInput) =>
  $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=1').then(
    (data) => {
      assert.equal(
        data.assertions[2].method,
        'isDefined',
        'A string is not undefined'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );

--solutions--

/**
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  Please check our contributing guidelines to learn more.
*/