code_path: "./src/calculator.py"
test_focus: "边界条件和异常处理"
coverage_target: 0.9

test_cases:
  - name: "test_add_positive_numbers"
    description: "测试正数相加"
    input: "add(2, 3)"
    expected: "5"
    type: "unit"
  - name: "test_add_negative_numbers"
    description: "测试负数相加"
    input: "add(-2, -3)"
    expected: "-5"
    type: "unit"
  - name: "test_add_overflow"
    description: "测试溢出异常"
    input: "add(MAX_INT, 1)"
    expected: "OverflowError"
    type: "exception"

fixture_design:
  - name: "calculator"
    scope: "function"
    description: "每个测试创建新的 calculator 实例"
  - name: "mock_db"
    scope: "session"
    description: "共享的 mock 数据库"

mock_strategy:
  - target: "external_api.call"
    method: "patch"
    return_value: "{\"status\": \"ok\"}"

test_file: |
  import pytest
  from calculator import add

  def test_add_positive_numbers():
      assert add(2, 3) == 5

  def test_add_negative_numbers():
      assert add(-2, -3) == -5

  def test_add_overflow():
      with pytest.raises(OverflowError):
          add(MAX_INT, 1)