Pro Calculator - C# Console Edition

Written by Brian McCarthy

Project Description

This project is a comprehensive C# console-based calculator designed to illustrate the full software development lifecycle (SDLC). It features a robust arithmetic engine with user-friendly input validation, error handling, and an extensive suite of automated tests across multiple frameworks and methodologies.

Key Features Implemented

• Basic Arithmetic: Addition, Subtraction, Multiplication, Division, and Modulus.
• Robust Input Validation: Handles non-numeric inputs and division-by-zero scenarios gracefully.
• Modern C# Syntax: Uses string interpolation, exception handling, and clean code principles.
• Extensive Testing Suite: 100+ tests spanning Selenium, Playwright, Cypress, Cucumber, and various performance/security benchmarks.
• Professional Documentation: Full development requirements and test reporting.

Project Structure

• PersonalCalculator.sln: C# Solution.
• Models/: Domain logic classes.
• Helpers/: Validation utilities.
• Program.cs: Entry point.
• Dev-Requirements.txt: Technical specifications.
• test_report.md: QA Summary.
• Selenium-Tests/: 15 C# Selenium WebDriver tests.
• Playwright-Tests/: 15 C# Playwright tests.
• Cypress-Tests/: 15 JavaScript Cypress tests.
• Cucumber-Tests/: 15 BDD Gherkin/SpecFlow tests.
• Load-Tests/: 8 Performance load benchmarks.
• Stress-Tests/: 8 System stability tests.
• Performance-Tests/: 8 Execution speed benchmarks.
• Unit-Tests/: 8 Component-level logic tests.
• System-Tests/: 8 Full environment tests.
• Integration-Tests/: 8 Module communication tests.
• Security-Tests/: 8 Boundary and sanitization tests.
• End-to-End-Tests/: 8 High-level user journey tests.

How to Use

1. Application: Compile Program.cs and run the executable. Follow the on-screen menu to perform calculations.
2. Tests: Each test folder contains its own configuration and source files. Use the respective test runner (NUnit, Playwright CLI, Cypress, etc.) to execute.

Testing Types & Descriptions

Category	Description	Count	Status
Selenium	Browser-based UI automation simulating the console interface.	15	PASSED
Playwright	Modern headless browser automation for high-speed verification.	15	PASSED
Cypress	Frontend E2E testing for the web-based simulation.	15	PASSED
Cucumber	BDD scenarios verifying user requirements in plain English.	15	PASSED
Load	Verifies application performance under high-frequency operation.	8	PASSED
Stress	Tests the application limits with extreme input values.	8	PASSED
Performance	Benchmarks calculation speeds and memory footprint.	8	PASSED
Unit	Atomic tests for individual methods and logic branches.	8	PASSED
System	Validates the application within its runtime environment.	8	PASSED
Integration	Checks the interaction between input, logic, and output layers.	8	PASSED
Security	Ensures safety against input poisoning and overflows.	8	PASSED
End-to-End	Validates the complete user flowchart from start to finish.	8	PASSED

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Created as a capstone project for professional C# development certification.