Test Driven Development Coverage Report Structure

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  "$id": "https://raw.githubusercontent.com/api-evangelist/test-driven-development/refs/heads/main/json-structure/test-driven-development-coverage-report-structure.json",
  "name": "CoverageReport",
  "description": "A code coverage report produced after running a TDD test suite, showing the percentage of code lines, branches, and functions covered by tests.",
  "properties": {
    "id": {
      "description": "Unique identifier for the coverage report.",
      "type": "string"
    },
    "project": {
      "description": "Name of the project or repository this coverage report applies to.",
      "type": "string"
    },
    "commit_hash": {
      "description": "Git commit hash for which this coverage was measured.",
      "type": "string"
    },
    "branch": {
      "description": "Git branch name.",
      "type": "string"
    },
    "build_id": {
      "description": "CI build identifier associated with this coverage report.",
      "type": "string"
    },
    "summary": {
      "$ref": "#/definitions/CoverageSummary",
      "description": "Overall coverage statistics for the project."
    },
    "files": {
      "items": {
        "$ref": "#/definitions/FileCoverage"
      },
      "description": "Per-file coverage breakdown.",
      "type": "array"
    },
    "generated_at": {
      "description": "ISO 8601 timestamp when the coverage report was generated.",
      "type": "datetime"
    },
    "tool": {
      "description": "Coverage tool used to generate the report (e.g., Istanbul, JaCoCo, coverage.py).",
      "type": "string"
    }
  },
  "required": [
    "id",
    "project",
    "summary",
    "generated_at"
  ],
  "definitions": {
    "CoverageSummary": {
      "properties": {
        "lines_pct": {
          "minimum": 0,
          "maximum": 100,
          "description": "Percentage of code lines covered by tests.",
          "type": "double"
        },
        "branches_pct": {
          "minimum": 0,
          "maximum": 100,
          "description": "Percentage of code branches covered by tests.",
          "type": "double"
        },
        "functions_pct": {
          "minimum": 0,
          "maximum": 100,
          "description": "Percentage of functions covered by tests.",
          "type": "double"
        },
        "statements_pct": {
          "minimum": 0,
          "maximum": 100,
          "description": "Percentage of statements covered by tests.",
          "type": "double"
        },
        "lines_total": {
          "description": "Total number of executable lines.",
          "type": "int32"
        },
        "lines_covered": {
          "description": "Number of executable lines covered by tests.",
          "type": "int32"
        }
      },
      "required": [
        "lines_pct"
      ],
      "type": "object",
      "name": "CoverageSummary"
    },
    "FileCoverage": {
      "properties": {
        "file_path": {
          "description": "Relative path to the source file.",
          "type": "string"
        },
        "lines_pct": {
          "minimum": 0,
          "maximum": 100,
          "description": "Line coverage percentage for this file.",
          "type": "double"
        },
        "branches_pct": {
          "minimum": 0,
          "maximum": 100,
          "description": "Branch coverage percentage for this file.",
          "type": "double"
        }
      },
      "required": [
        "file_path",
        "lines_pct"
      ],
      "type": "object",
      "name": "FileCoverage"
    }
  },
  "type": "object"
}