freeCodeCamp/curriculum/challenges/espanol/09-information-security/information-security-projects/stock-price-checker.md

id	title	challengeType	forumTopicId	dashedName
587d824a367417b2b2512c44	Stock Price Checker	4	301572	stock-price-checker

--description--

Build a full stack JavaScript app that is functionally similar to this: https://stock-price-checker.freecodecamp.rocks/.

Since all reliable stock price APIs require an API key, we've built a workaround. Use https://stock-price-checker-proxy.freecodecamp.rocks/ to get up-to-date stock price information without needing to sign up for your own key.

Working on this project will involve you writing your code using one of the following methods:

• Clone this GitHub repo and complete your project locally.
• Use our repl.it starter project 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 projects source code in the GitHub Link field.

--instructions--

1. SET NODE_ENV to test without quotes and set DB to your MongoDB connection string
2. Complete the project in routes/api.js or by creating a handler/controller
3. You will add any security features to server.js
4. You will create all of the functional tests in tests/2_functional-tests.js

Write the following tests in tests/2_functional-tests.js:

• Viewing one stock: GET request to /api/stock-prices/
• Viewing one stock and liking it: GET request to /api/stock-prices/
• Viewing the same stock and liking it again: GET request to /api/stock-prices/
• Viewing two stocks: GET request to /api/stock-prices/
• Viewing two stocks and liking them: GET request to /api/stock-prices/

--hints--

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

(getUserInput) => {
  assert(
    !/.*\/stock-price-checker\.freecodecamp\.rocks/.test(getUserInput('url'))
  );
};

You should set the content security policies to only allow loading of scripts and CSS from your server.

async (getUserInput) => {
  const data = await fetch(getUserInput('url') + '/_api/app-info');
  const parsed = await data.json();
  assert.isTrue(
    parsed.headers['content-security-policy'].includes("script-src 'self'")
  );
  assert.isTrue(
    parsed.headers['content-security-policy'].includes("style-src 'self'")
  );
};

You can send a GET request to /api/stock-prices with form data containing a NASDAQ stock ticker. Returned will be an object with the property stockData.

async (getUserInput) => {
  const data = await fetch(
    getUserInput('url') + '/api/stock-prices?stock=GOOG'
  );
  const parsed = await data.json();
  assert.property(parsed, 'stockData');
};

The stockData property includes the stock ticker as a string, the price as a number, and likes as a number.

async (getUserInput) => {
  const data = await fetch(
    getUserInput('url') + '/api/stock-prices?stock=GOOG'
  );
  const parsed = await data.json();
  const ticker = parsed.stockData;
  assert.typeOf(ticker.price, 'number');
  assert.typeOf(ticker.likes, 'number');
  assert.typeOf(ticker.stock, 'string');
};

You can also pass along a like field as true (boolean) to have your like added to the stock(s). Only 1 like per IP should be accepted.

If you pass along 2 stocks, the returned value will be an array with information about both stocks. Instead of likes, it will display rel_likes (the difference between the likes on both stocks) for both stockData objects.

async (getUserInput) => {
  const data = await fetch(
    getUserInput('url') + '/api/stock-prices?stock=GOOG&stock=MSFT'
  );
  const parsed = await data.json();
  const ticker = parsed.stockData;
  assert.typeOf(ticker, 'array');
  assert.property(ticker[0], 'rel_likes');
  assert.property(ticker[1], 'rel_likes');
};

All 5 functional tests are complete and passing.

async (getUserInput) => {
  const tests = await fetch(getUserInput('url') + '/_api/get-tests');
  const parsed = await tests.json();
  assert.isTrue(parsed.length >= 5);
  parsed.forEach((test) => {
    assert.equal(test.state, 'passed');
  });
};

--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.
*/