[
  {
    "function_name": "calculate_discount",
    "function_code": "def calculate_discount(price, discount_percent):\r\n    if discount_percent < 0 or discount_percent > 100:\r\n        raise ValueError('Discount must be between 0 and 100')\r\n    discount = price * discount_percent / 100\r\n    return round(price - discount, 2)",
    "old_test_code": "import unittest\r\nfrom target import calculate_discount\r\nclass TestCalculateDiscount(unittest.TestCase):\r\n    def test_basic(self):\r\n        self.assertEqual(calculate_discount(100, 10), 90.0)",
    "new_test_code": "",
    "old_score": 0.6249,
    "new_score": 0.0,
    "improvement": -0.6249,
    "old_evaluation": {
      "coverage": {
        "line_coverage_pct": 71.4,
        "branch_coverage_pct": 50.0,
        "missing_lines": [
          5
        ],
        "missing_branches": [
          [
            3,
            5
          ]
        ]
      },
      "mutation": {
        "total_mutants": 8,
        "killed": 6,
        "mutation_score": 75.0
      },
      "static": {
        "total_test_functions": 1,
        "total_assertions": 1,
        "assertion_density": 1.0
      }
    },
    "new_evaluation": {
      "coverage": {},
      "mutation": {
        "total_mutants": 8,
        "killed": 0,
        "mutation_score": 0.0
      },
      "static": {
        "total_test_functions": 0,
        "total_assertions": 0,
        "assertion_density": 0.0
      }
    }
  },
  {
    "function_name": "count_words",
    "function_code": "def count_words(text):\r\n    if not text or not text.strip():\r\n        return 0\r\n    return len(text.strip().split())",
    "old_test_code": "import unittest\r\nfrom target import count_words\r\nclass TestCountWords(unittest.TestCase):\r\n    def test_basic(self):\r\n        self.assertEqual(count_words('hello world'), 2)",
    "new_test_code": "import unittest\nfrom target import count_words\nclass TestCountWords(unittest.TestCase):\n    def test_empty(self):\n        self.assertEqual(count_words(\"\"), 0)\n    def test_multiple_spaces(self):\n        self.assertEqual(count_words(\"  \\n \\t   \\r \"), 0)\n    def test_only_punctuation(self):\n        self.assertEqual(count_words(\"~!@#$%^&*()-+={}[]|;'\\\\:\\\"<>,.?/`\"), 0)\n    def test_no_space(self):\n        self.assertEqual(count_words(\".?.,\"), 3)\n    def test_single_word(self):\n        self.assertEqual(count_words(\"helloworld\"), 1)\n    def test_numbers(self):\n        self.assertEqual(count_words(\"hello123world\"), 4)\n    def test_longer_sentence(self):\n        self.assertEqual(count_words(\"Hello World!\"), 3)",
    "old_score": 0.5084,
    "new_score": 0.95,
    "improvement": 0.4416,
    "old_evaluation": {
      "coverage": {
        "line_coverage_pct": 66.7,
        "branch_coverage_pct": 50.0,
        "missing_lines": [
          5
        ],
        "missing_branches": [
          [
            3,
            5
          ]
        ]
      },
      "mutation": {
        "total_mutants": 4,
        "killed": 1,
        "mutation_score": 25.0
      },
      "static": {
        "total_test_functions": 1,
        "total_assertions": 1,
        "assertion_density": 1.0
      }
    },
    "new_evaluation": {
      "coverage": {
        "line_coverage_pct": 100.0,
        "branch_coverage_pct": 100.0,
        "missing_lines": [],
        "missing_branches": []
      },
      "mutation": {
        "total_mutants": 4,
        "killed": 4,
        "mutation_score": 100.0
      },
      "static": {
        "total_test_functions": 7,
        "total_assertions": 7,
        "assertion_density": 1.0
      }
    }
  }
]