Cypress installation (npm install cypress) - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

What does the command npm install cypress do?

When you run npm install cypress in your project folder, what happens?

A It downloads and installs the Cypress testing tool and adds it to your project's dependencies.

B It runs all Cypress tests in your project automatically.

C It updates the Node.js version on your computer to support Cypress.

D It creates a new Cypress project with default test files.

💡 Hint

Think about what npm install generally does for packages.

The command npm install cypress downloads the Cypress package from the npm registry and installs it into your project's node_modules folder. It also adds Cypress as a dependency in your package.json file.

❓ Predict Output

intermediate

What is the output after running npm install cypress successfully?

After running npm install cypress in a new project, what message will you see indicating success?

A Error: Cannot find module 'cypress'

B added 257 packages, and audited 258 packages in 12s

C Cypress tests executed successfully

D npm: command not found

💡 Hint

Look for a message that confirms package installation, not test execution.

When npm install completes successfully, it shows a message like added 257 packages, and audited 258 packages in 12s. It does not run tests or show errors.

❓ locator

advanced

Where does Cypress get installed after running npm install cypress?

After installing Cypress with npm, where can you find the Cypress executable files in your project?

A Inside the <code>node_modules/cypress</code> folder within your project directory.

B In the root folder of your project, as a standalone <code>cypress</code> folder.

C In the global npm folder outside your project directory.

D Inside the <code>tests/cypress</code> folder created automatically.

💡 Hint

Think about where npm installs packages locally by default.

npm installs packages inside the node_modules folder in your project. Cypress files will be under node_modules/cypress.

❓ assertion

advanced

Which assertion correctly verifies Cypress is installed in a Node.js project?

Given the following Node.js code snippet, which assertion correctly checks that Cypress is listed as a dependency in package.json?

Cypress

const fs = require('fs');
const packageJson = JSON.parse(fs.readFileSync('package.json', 'utf-8'));
// Which assertion below is correct?

A assert(packageJson.scripts.cypress === 'install')

B assert(packageJson.devDependencies.includes('cypress'))

C assert(packageJson.dependencies.cypress === undefined)

D assert(packageJson.dependencies.hasOwnProperty('cypress'))

💡 Hint

Check how dependencies are stored in package.json as objects, not arrays.

Dependencies in package.json are objects with package names as keys. Using hasOwnProperty('cypress') checks if Cypress is listed.

🔧 Debug

expert

Why does npm install cypress fail with ERR! code E404?

You run npm install cypress but get this error: npm ERR! 404 Not Found - GET https://registry.npmjs.org/cypress - Not found. What is the most likely cause?

A Your internet connection is down or npm registry is unreachable.

B You need to run <code>npm init</code> before installing any package.

C You typed the package name incorrectly or it does not exist in npm registry.

D Your Node.js version is too old to support Cypress installation.

💡 Hint

Check the error message carefully for clues about the package name or registry.

An ERR! 404 Not Found means npm cannot find the package in its registry. This usually happens if the package name is misspelled or does not exist.