Codecov Custom Coverage Format

Codecov JSON report format

While Codecov supports a large set of standard coverage formats, sometimes you need to add support to a third-party tool that doesn't have it.

Below is a very simple json coverage report that can be used if you are building a custom format.

{
  "coverage": {
    "filename": {
      "1": 0,      # line 1 missed
      "2": 1,      # line 2 hit once
      "3": "1/2",  # line 3 partial hit, one missing branch
      "4": "1/3",  # line 4 partial hit, two missing branches
                             # skip line 5
      "6": null,   # skip line 6
      "7": 5       # line 7 hit 5 times
    }
  }
}

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