Node.js prerequisite in Cypress - Test Execution Trace

Test Overview

This test checks if Node.js is installed and accessible by running a simple command in the terminal. It verifies that the Node.js version is displayed, confirming the prerequisite is met for running Cypress tests.

Test Code - Cypress

Cypress

describe('Node.js Prerequisite Check', () => {
  it('should confirm Node.js is installed by checking version output', () => {
    cy.exec('node -v').then((result) => {
      expect(result.code).to.equal(0);
      expect(result.stdout).to.match(/^v\d+\.\d+\.\d+/);
    });
  });
});

Execution Trace - 4 Steps

Step	Action	System State	Assertion	Result
1	Test starts	Cypress test runner is ready	-	PASS
2	Runs command 'node -v' using cy.exec	Terminal executes Node.js version command	Check that command exit code is 0 (success)	PASS
3	Receives output from 'node -v' command	Output contains Node.js version string like 'v18.15.0'	Verify output matches version pattern /^v\d+\.\d+\.\d+/	PASS
4	Test ends with all assertions passed	Node.js version confirmed, prerequisite met	-	PASS

Failure Scenario

Failing Condition: Node.js is not installed or 'node -v' command fails

Execution Trace Quiz - 3 Questions

What does the test check to confirm Node.js is installed?

A The presence of a node_modules folder

B The Cypress test runner version

C The output of 'node -v' command matches a version pattern

D The existence of a package.json file

Key Result

Always verify that required tools like Node.js are installed and accessible before running tests that depend on them to avoid false failures.