Example: Add Calculator Module with TDD/BDD (Copilot Demo)

[BatraXPankaj]

User Story

As a developer using this template
I want to add a simple calculator module with full TDD/BDD coverage
So that I can demonstrate the development workflow with Copilot assistance

Acceptance Criteria (BDD Scenarios)

Scenario: Calculator performs basic addition
Given a calculator instance
When I add 2 and 3
Then the result should be 5

Scenario: Calculator performs subtraction
Given a calculator instance
When I subtract 3 from 10
Then the result should be 7

Scenario: Calculator handles division by zero
Given a calculator instance
When I divide 10 by 0
Then it should throw a DivisionByZero error
And the error message should be clear

Scenario: Calculator chains operations
Given a calculator instance
When I add 5, then multiply by 2, then subtract 3
Then the result should be 7

Technical Implementation Hints

• Files to create:
  • src/calculator.ts (or .js, .py, etc based on tech stack)
  • tests/calculator.test.ts (unit tests - TDD)
  • tests/calculator.bdd.ts (BDD scenarios)
• Test framework: Jest (Node.js) / Pytest (Python) / your choice
• Functions needed: add(), subtract(), multiply(), divide(), chain()
• Error handling: Custom error for division by zero
• Follow: Red → Green → Refactor cycle

Definition of Done

• Unit tests written first (TDD - Red)
• BDD scenarios implemented
• Calculator implementation (Green)
• Code refactored and cleaned
• All tests passing
• Code reviewed
• Documentation added (JSDoc/docstrings)
• CI pipeline passes

Priority: Medium
Size: M (4-8 hours)

---

🤖 This issue is ready for GitHub Copilot assignment!

To assign to Copilot:

1. Ensure your repository has Copilot enabled
2. Assign this issue to @github-copilot
3. Copilot will analyze and create a PR with implementation

[github-actions]

🤖 Ready for GitHub Copilot

This issue has been marked as ready for automated development.

To assign to Copilot:

1. Ensure all acceptance criteria are clear
2. Verify technical implementation hints are provided
3. Use the repository settings to assign to @github-copilot

Expected outcome:

• Copilot will create a pull request with implementation
• Tests will be written first (TDD)
• Code will be reviewed by humans before merging

Learn more about Copilot

[github-actions]

⏰ This issue has been inactive for 30 days

It will be automatically closed in 7 days unless there is activity.

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[github-actions]

🔒 Closing due to inactivity

This issue was automatically closed after 37 days of inactivity.

If still needed, please:

• Reopen and update with current context
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