freeCodeCamp/curriculum/challenges/chinese/06-quality-assurance/quality-assurance-projects/personal-library.md

---
id: 587d824a367417b2b2512c43
title: Personal Library
challengeType: 4
forumTopicId: 301571
dashedName: personal-library
---

# --description--

Build a full stack JavaScript app that is functionally similar to this: <https://personal-library.freecodecamp.rocks/>. Working on this project will involve you writing your code using one of the following methods:

-   Clone [this GitHub repo](https://github.com/freeCodeCamp/boilerplate-project-library) and complete your project locally.
-   Use [our repl.it starter project](https://repl.it/github/freeCodeCamp/boilerplate-project-library)) to complete your project.
-   Use a site builder of your choice to complete the project. Be sure to incorporate all the files from our GitHub repo.

When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the `Solution Link` field. Optionally, also submit a link to your project's source code in the `GitHub Link` field.

# --instructions--

1.  Add your MongoDB connection string to `.env` without quotes as `DB`  
   Example: `DB=mongodb://admin:pass@1234.mlab.com:1234/fccpersonallib`
2.  In your `.env` file set `NODE_ENV` to `test`, without quotes
3.  You need to create all routes within `routes/api.js`
4.  You will create all functional tests in `tests/2_functional-tests.js`

# --hints--

You can provide your own project, not the example URL.

```js
(getUserInput) => {
  assert(
    !/.*\/personal-library\.freecodecamp\.rocks/.test(getUserInput('url'))
  );
};
```

You can send a <b>POST</b> request to `/api/books` with `title` as part of the form data to add a book.  The returned response will be an object with the `title` and a unique `_id` as keys.  If `title` is not included in the request, the returned response should be the string `missing required field title`.

```js
async (getUserInput) => {
  try {
    let data1 = await $.post(getUserInput('url') + '/api/books', {
      title: 'Faux Book 1'
    });
    assert.isObject(data1);
    assert.property(data1, 'title');
    assert.equal(data1.title, 'Faux Book 1');
    assert.property(data1, '_id');
    let data2 = await $.post(getUserInput('url') + '/api/books');
    assert.isString(data2);
    assert.equal(data2, 'missing required field title');
  } catch (err) {
    throw new Error(err.responseText || err.message);
  }
};
```

You can send a <b>GET</b> request to `/api/books` and receive a JSON response representing all the books. The JSON response will be an array of objects with each object (book) containing `title`, `_id`, and `commentcount` properties.

```js
async (getUserInput) => {
  try {
    let url = getUserInput('url') + '/api/books';
    let a = $.post(url, { title: 'Faux Book A' });
    let b = $.post(url, { title: 'Faux Book B' });
    let c = $.post(url, { title: 'Faux Book C' });
    Promise.all([a, b, c]).then(async () => {
      let data = await $.get(url);
      assert.isArray(data);
      assert.isAtLeast(data.length, 3);
      data.forEach((book) => {
        assert.isObject(book);
        assert.property(book, 'title');
        assert.isString(book.title);
        assert.property(book, '_id');
        assert.property(book, 'commentcount');
        assert.isNumber(book.commentcount);
      });
    });
  } catch (err) {
    throw new Error(err.responseText || err.message);
  }
};
```

You can send a <b>GET</b> request to `/api/books/{_id}` to retrieve a single object of a book containing the properties `title`, `_id`, and a `comments` array (empty array if no comments present). If no book is found, return the string `no book exists`.

```js
async (getUserInput) => {
  try {
    let url = getUserInput('url') + '/api/books';
    let noBook = await $.get(url + '/5f665eb46e296f6b9b6a504d');
    assert.isString(noBook);
    assert.equal(noBook, 'no book exists');
    let sampleBook = await $.post(url, { title: 'Faux Book Alpha' });
    assert.isObject(sampleBook);
    let bookId = sampleBook._id;
    let bookQuery = await $.get(url + '/' + bookId);
    assert.isObject(bookQuery);
    assert.property(bookQuery, 'title');
    assert.equal(bookQuery.title, 'Faux Book Alpha');
    assert.property(bookQuery, 'comments');
    assert.isArray(bookQuery.comments);
  } catch (err) {
    throw new Error(err.responseText || err.message);
  }
};
```

You can send a <b>POST</b> request containing `comment` as the form body data to `/api/books/{_id}` to add a comment to a book. The returned response will be the books object similar to <b>GET</b> `/api/books/{_id}` request in an earlier test. If `comment` is not included in the request, return the string `missing required field comment`. If no book is found, return the string `no book exists`.

```js
async (getUserInput) => {
  try {
    let url = getUserInput('url') + '/api/books';
    let commentTarget = await $.post(url, { title: 'Notable Book' });
    assert.isObject(commentTarget);
    let bookId = commentTarget._id;
    let bookCom1 = await $.post(url + '/' + bookId, {
      comment: 'This book is fab!'
    });
    let bookCom2 = await $.post(url + '/' + bookId, {
      comment: 'I did not care for it'
    });
    assert.isObject(bookCom2);
    assert.property(bookCom2, '_id');
    assert.property(bookCom2, 'title');
    assert.property(bookCom2, 'comments');
    assert.lengthOf(bookCom2.comments, 2);
    bookCom2.comments.forEach((comment) => {
      assert.isString(comment);
      assert.oneOf(comment, ['This book is fab!', 'I did not care for it']);
    });
    let commentErr = await $.post(url + '/' + bookId);
    assert.isString(commentErr);
    assert.equal(commentErr, 'missing required field comment');
    let failingComment = await $.post(url + '/5f665eb46e296f6b9b6a504d', {
      comment: 'Never Seen Comment'
    });
    assert.isString(failingComment);
    assert.equal(failingComment, 'no book exists');
  } catch (err) {
    throw new Error(err.responseText || err.message);
  }
};
```

You can send a <b>DELETE</b> request to `/api/books/{_id}` to delete a book from the collection. The returned response will be the string `delete successful` if successful. If no book is found, return the string `no book exists`.

```js
async (getUserInput) => {
  try {
    let url = getUserInput('url') + '/api/books';
    let deleteTarget = await $.post(url, { title: 'Deletable Book' });
    assert.isObject(deleteTarget);
    let bookId = deleteTarget._id;
    let doDelete = await $.ajax({ url: url + '/' + bookId, type: 'DELETE' });
    assert.isString(doDelete);
    assert.equal(doDelete, 'delete successful');
    let failingDelete = await $.ajax({
      url: url + '/5f665eb46e296f6b9b6a504d',
      type: 'DELETE'
    });
    assert.isString(failingDelete);
    assert.equal(failingDelete, 'no book exists');
  } catch (err) {
    throw new Error(err.responseText || err.message);
  }
};
```

You can send a <b>DELETE</b> request to `/api/books` to delete all books in the database. The returned response will be the string `'complete delete successful` if successful.

```js
async (getUserInput) => {
  try {
    const deleteAll = await $.ajax({
      url: getUserInput('url') + '/api/books',
      type: 'DELETE'
    });
    assert.isString(deleteAll);
    assert.equal(deleteAll, 'complete delete successful');
  } catch (err) {
    throw new Error(err.responseText || err.message);
  }
};
```

All 10 functional tests required are complete and passing.

```js
async (getUserInput) => {
  try {
    const getTests = await $.get(getUserInput('url') + '/_api/get-tests');
    assert.isArray(getTests);
    assert.isAtLeast(getTests.length, 10, 'At least 10 tests passed');
    getTests.forEach((test) => {
      assert.equal(test.state, 'passed', 'Test in Passed State');
      assert.isAtLeast(
        test.assertions.length,
        1,
        'At least one assertion per test'
      );
    });
  } catch (err) {
    throw new Error(err.responseText || err.message);
  }
};
```

# --solutions--

```js
/**
  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.
*/
```