{
  "metadata": {
    "storyId": "TEST-TDD-001",
    "epicId": "BMAD-TESTING",
    "sprintId": "CURRENT",
    "title": "TDD Agent Validation Test",
    "description": "Validate TDD Developer Agent functionality with a simple Calculator implementation",
    "createdBy": "Scrum Master",
    "assignedTo": "TDD Developer Agent (Ted)",
    "createdAt": "2025-01-04",
    "priority": "High",
    "storyPoints": 3,
    "version": "1.0.0"
  },
  "acceptanceCriteria": [
    {
      "id": "AC-001",
      "title": "Calculator Add Function",
      "given": "a Calculator class is needed",
      "when": "the add method is called with two numbers",
      "then": "it should return the sum of those numbers",
      "testable": true,
      "priority": "Must Have"
    },
    {
      "id": "AC-002",
      "title": "Calculator Subtract Function",
      "given": "a Calculator class exists",
      "when": "the subtract method is called with two numbers",
      "then": "it should return the difference (first - second)",
      "testable": true,
      "priority": "Must Have"
    },
    {
      "id": "AC-003",
      "title": "Error Handling",
      "given": "the Calculator class",
      "when": "invalid input is provided (non-numeric)",
      "then": "it should raise an appropriate error with a clear message",
      "testable": true,
      "priority": "Must Have"
    }
  ],
  "artifacts": {
    "documents": [],
    "code": [
      {
        "type": "class",
        "name": "Calculator",
        "path": "calculator.py",
        "description": "Main Calculator class implementation",
        "methods": [
          {
            "name": "add",
            "parameters": ["a: float", "b: float"],
            "returns": "float",
            "description": "Adds two numbers and returns the result"
          },
          {
            "name": "subtract",
            "parameters": ["a: float", "b: float"],
            "returns": "float",
            "description": "Subtracts second number from first and returns the result"
          }
        ]
      }
    ],
    "tests": [
      {
        "type": "unit",
        "name": "test_calculator.py",
        "path": "test_calculator.py",
        "description": "Comprehensive unit tests for Calculator class",
        "coverage": {
          "target": "100%",
          "methods": ["add", "subtract"],
          "errorCases": true
        }
      }
    ]
  },
  "interfaces": {
    "Calculator": {
      "type": "class",
      "methods": {
        "add": {
          "signature": "def add(self, a: float, b: float) -> float",
          "description": "Adds two numbers",
          "examples": ["calc.add(2, 3) # Returns 5", "calc.add(-1, 1) # Returns 0", "calc.add(0.5, 0.5) # Returns 1.0"]
        },
        "subtract": {
          "signature": "def subtract(self, a: float, b: float) -> float",
          "description": "Subtracts b from a",
          "examples": ["calc.subtract(5, 3) # Returns 2", "calc.subtract(0, 5) # Returns -5", "calc.subtract(2.5, 1.5) # Returns 1.0"]
        }
      },
      "errorHandling": {
        "TypeError": "Raised when non-numeric values are provided",
        "ValueError": "Raised when invalid operations are attempted"
      }
    }
  },
  "constraints": {
    "technical": [
      "Must use Python 3.x",
      "Must follow PEP 8 style guidelines",
      "Must use type hints for all methods",
      "Tests must use pytest or unittest framework"
    ],
    "functional": [
      "Calculator must handle both integer and float inputs",
      "Error messages must be clear and descriptive",
      "All methods must have docstrings"
    ],
    "performance": ["Operations should complete in O(1) time", "No external dependencies required for basic operations"]
  },
  "testStrategy": {
    "approach": "Test-Driven Development with RED-GREEN-REFACTOR",
    "levels": {
      "unit": {
        "required": true,
        "coverage": "100%",
        "framework": "pytest or unittest"
      },
      "integration": {
        "required": false
      },
      "e2e": {
        "required": false
      }
    },
    "testCases": [
      {
        "id": "TC-001",
        "acReference": "AC-001",
        "type": "unit",
        "description": "Test add with positive integers",
        "input": "add(2, 3)",
        "expected": "5"
      },
      {
        "id": "TC-002",
        "acReference": "AC-001",
        "type": "unit",
        "description": "Test add with negative numbers",
        "input": "add(-5, 3)",
        "expected": "-2"
      },
      {
        "id": "TC-003",
        "acReference": "AC-001",
        "type": "unit",
        "description": "Test add with floats",
        "input": "add(1.5, 2.5)",
        "expected": "4.0"
      },
      {
        "id": "TC-004",
        "acReference": "AC-002",
        "type": "unit",
        "description": "Test subtract with positive integers",
        "input": "subtract(10, 3)",
        "expected": "7"
      },
      {
        "id": "TC-005",
        "acReference": "AC-002",
        "type": "unit",
        "description": "Test subtract resulting in negative",
        "input": "subtract(3, 10)",
        "expected": "-7"
      },
      {
        "id": "TC-006",
        "acReference": "AC-002",
        "type": "unit",
        "description": "Test subtract with floats",
        "input": "subtract(5.5, 2.5)",
        "expected": "3.0"
      },
      {
        "id": "TC-007",
        "acReference": "AC-003",
        "type": "unit",
        "description": "Test add with string input",
        "input": "add('a', 2)",
        "expected": "TypeError with descriptive message"
      },
      {
        "id": "TC-008",
        "acReference": "AC-003",
        "type": "unit",
        "description": "Test subtract with None input",
        "input": "subtract(None, 5)",
        "expected": "TypeError with descriptive message"
      },
      {
        "id": "TC-009",
        "acReference": "AC-001",
        "type": "unit",
        "description": "Test add with zero",
        "input": "add(0, 0)",
        "expected": "0"
      },
      {
        "id": "TC-010",
        "acReference": "AC-002",
        "type": "unit",
        "description": "Test subtract with same numbers",
        "input": "subtract(5, 5)",
        "expected": "0"
      }
    ]
  },
  "dependencies": {
    "internal": [],
    "external": [],
    "testing": [
      {
        "name": "pytest",
        "version": ">=7.0.0",
        "purpose": "Testing framework",
        "optional": false
      }
    ]
  },
  "risks": {
    "technical": [],
    "functional": [],
    "testing": [
      {
        "risk": "Agent may not properly execute RED-GREEN-REFACTOR cycle",
        "mitigation": "Monitor each phase and verify tests fail before implementation",
        "severity": "Low"
      }
    ]
  },
  "notes": {
    "purpose": "This story is designed to validate the TDD Developer Agent functionality",
    "expectedOutcome": "A working Calculator class with comprehensive tests demonstrating proper TDD workflow",
    "simplicity": "Intentionally simple to focus on workflow validation rather than complex logic"
  }
}