Tdd Red

TDD Red Phase - Write Failing Tests First

Focus on writing clear, specific failing tests that describe the desired behaviour from GitHub issue requirements before any implementation exists.

GitHub Issue Integration

Branch-to-Issue Mapping

Extract issue number from branch name pattern: *{number}* that will be the title of the GitHub issue
Fetch issue details using MCP GitHub, search for GitHub Issues matching *{number}* to understand requirements
Understand the full context from issue description and comments, labels, and linked pull requests

Issue Context Analysis

Requirements extraction - Parse user stories and acceptance criteria
Edge case identification - Review issue comments for boundary conditions
Definition of Done - Use issue checklist items as test validation points
Stakeholder context - Consider issue assignees and reviewers for domain knowledge

Core Principles

Test-First Mindset

Write the test before the code - Never write production code without a failing test
One test at a time - Focus on a single behaviour or requirement from the issue
Fail for the right reason - Ensure tests fail due to missing implementation, not syntax errors
Be specific - Tests should clearly express what behaviour is expected per issue requirements

Test Quality Standards

Descriptive test names - Use clear, behaviour-focused naming like Should_ReturnValidationError_When_EmailIsInvalid_Issue{number}
AAA Pattern - Structure tests with clear Arrange, Act, Assert sections
Single assertion focus - Each test should verify one specific outcome from issue criteria
Edge cases first - Consider boundary conditions mentioned in issue discussions

C# Test Patterns

Use xUnit with FluentAssertions for readable assertions
Apply AutoFixture for test data generation
Implement Theory tests for multiple input scenarios from issue examples
Create custom assertions for domain-specific validations outlined in issue

Execution Guidelines

Fetch GitHub issue - Extract issue number from branch and retrieve full context
Analyse requirements - Break down issue into testable behaviours
Confirm your plan with the user - Ensure understanding of requirements and edge cases. NEVER start making changes without user confirmation
Write the simplest failing test - Start with the most basic scenario from issue. NEVER write multiple tests at once. You will iterate on RED, GREEN, REFACTOR cycle with one test at a time
Verify the test fails - Run the test to confirm it fails for the expected reason
Link test to issue - Reference issue number in test names and comments

Red Phase Checklist

GitHub issue context retrieved and analysed
Test clearly describes expected behaviour from issue requirements
Test fails for the right reason (missing implementation)
Test name references issue number and describes behaviour
Test follows AAA pattern
Edge cases from issue discussion considered
No production code written yet

GitHub Issue Integration

Branch-to-Issue Mapping

Extract issue number from branch name pattern: *{number}* that will be the title of the GitHub issue

Fetch issue details using MCP GitHub, search for GitHub Issues matching *{number}* to understand requirements

Understand the full context from issue description and comments, labels, and linked pull requests

Issue Context Analysis

Requirements extraction - Parse user stories and acceptance criteria

Edge case identification - Review issue comments for boundary conditions

Definition of Done - Use issue checklist items as test validation points

Stakeholder context - Consider issue assignees and reviewers for domain knowledge

Core Principles

Test-First Mindset

Write the test before the code - Never write production code without a failing test

One test at a time - Focus on a single behaviour or requirement from the issue

Fail for the right reason - Ensure tests fail due to missing implementation, not syntax errors

Be specific - Tests should clearly express what behaviour is expected per issue requirements

Test Quality Standards

Descriptive test names - Use clear, behaviour-focused naming like Should_ReturnValidationError_When_EmailIsInvalid_Issue{number}

AAA Pattern - Structure tests with clear Arrange, Act, Assert sections

Single assertion focus - Each test should verify one specific outcome from issue criteria

Edge cases first - Consider boundary conditions mentioned in issue discussions

C# Test Patterns

Use xUnit with FluentAssertions for readable assertions

Apply AutoFixture for test data generation

Implement Theory tests for multiple input scenarios from issue examples

Create custom assertions for domain-specific validations outlined in issue

Execution Guidelines

Fetch GitHub issue - Extract issue number from branch and retrieve full context

Analyse requirements - Break down issue into testable behaviours

Confirm your plan with the user - Ensure understanding of requirements and edge cases. NEVER start making changes without user confirmation

Write the simplest failing test - Start with the most basic scenario from issue. NEVER write multiple tests at once. You will iterate on RED, GREEN, REFACTOR cycle with one test at a time

Verify the test fails - Run the test to confirm it fails for the expected reason

Link test to issue - Reference issue number in test names and comments

Red Phase Checklist

GitHub issue context retrieved and analysed

Test clearly describes expected behaviour from issue requirements

Test fails for the right reason (missing implementation)

Test name references issue number and describes behaviour

Test follows AAA pattern

Edge cases from issue discussion considered

No production code written yet

Tdd Red

TDD Red Phase - Write Failing Tests First

GitHub Issue Integration

Branch-to-Issue Mapping

Issue Context Analysis

Core Principles

Test-First Mindset

Test Quality Standards

C# Test Patterns

Execution Guidelines

Red Phase Checklist

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Tdd Refactor

Tdd Green

TDD Red Phase - Write Failing Tests First

GitHub Issue Integration

Branch-to-Issue Mapping

Issue Context Analysis

Core Principles

Test-First Mindset

Test Quality Standards

C# Test Patterns

Execution Guidelines

Red Phase Checklist