Here is a example of the karma json reporter output

karma-json-reporter-output.json

{
  "browsers": {
    "J5RIN6sK-_Hhjeq6MetI": {
      "id": "J5RIN6sK-_Hhjeq6MetI",
      "fullName": "Mozilla/5.0 (Unknown; Linux x86_64) AppleWebKit/534.34 (KHTML, like Gecko) PhantomJS/1.9.2 Safari/534.34",
      "name": "PhantomJS 1.9.2 (Linux)",
      "state": 1,
      "lastResult": {
        "success": 0,
        "failed": 1,
        "skipped": 2,
        "total": 3,
        "totalTime": 108,
        "netTime": 3,
        "error": true,
        "disconnected": false
      },
      "launchId": 63903095
    },
    "nmPWK5TPenTNBrWpMetJ": {
      "id": "nmPWK5TPenTNBrWpMetJ",
      "fullName": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/31.0.1650.63 Chrome/31.0.1650.63 Safari/537.36",
      "name": "Chromium 31.0.1650 (Ubuntu)",
      "state": 1,
      "lastResult": {
        "success": 0,
        "failed": 1,
        "skipped": 2,
        "total": 3,
        "totalTime": 112,
        "netTime": 3,
        "error": true,
        "disconnected": false
      },
      "launchId": 36780332
    },
    "ammokiTp-ieS8VmpMetK": {
      "id": "ammokiTp-ieS8VmpMetK",
      "fullName": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:26.0) Gecko/20100101 Firefox/26.0",
      "name": "Firefox 26.0.0 (Ubuntu)",
      "state": 1,
      "lastResult": {
        "success": 0,
        "failed": 1,
        "skipped": 2,
        "total": 3,
        "totalTime": 105,
        "netTime": 1,
        "error": true,
        "disconnected": false
      },
      "launchId": 34520527
    }
  },
  "result": {
    "J5RIN6sK-_Hhjeq6MetI": [
      {
        "id": 0,
        "description": "should compute the square root of 4 as 2",
        "suite": [
          "sqrt"
        ],
        "success": true,
        "skipped": true,
        "time": 0,
        "log": []
      },
      {
        "id": 1,
        "description": "should compute the square root of 3 as 2",
        "suite": [
          "sqrt"
        ],
        "success": true,
        "skipped": true,
        "time": 0,
        "log": []
      },
      {
        "id": 2,
        "description": "should compute the square root of 2 as 2",
        "suite": [
          "sqrt"
        ],
        "success": false,
        "skipped": false,
        "time": 3,
        "log": [
          "Expected 1.414213562373095 to equal 2."
        ]
      }
    ],
    "nmPWK5TPenTNBrWpMetJ": [
      {
        "id": 0,
        "description": "should compute the square root of 4 as 2",
        "suite": [
          "sqrt"
        ],
        "success": true,
        "skipped": true,
        "time": 0,
        "log": []
      },
      {
        "id": 1,
        "description": "should compute the square root of 3 as 2",
        "suite": [
          "sqrt"
        ],
        "success": true,
        "skipped": true,
        "time": 0,
        "log": []
      },
      {
        "id": 2,
        "description": "should compute the square root of 2 as 2",
        "suite": [
          "sqrt"
        ],
        "success": false,
        "skipped": false,
        "time": 3,
        "log": [
          "Expected 1.4142135623730951 to equal 2.\nError: Expected 1.4142135623730951 to equal 2.\n    at null.<anonymous> (http://localhost:9876/base/foo.spec.js?1387461078000:12:25)"
        ]
      }
    ],
    "ammokiTp-ieS8VmpMetK": [
      {
        "id": 0,
        "description": "should compute the square root of 4 as 2",
        "suite": [
          "sqrt"
        ],
        "success": true,
        "skipped": true,
        "time": 0,
        "log": []
      },
      {
        "id": 1,
        "description": "should compute the square root of 3 as 2",
        "suite": [
          "sqrt"
        ],
        "success": true,
        "skipped": true,
        "time": 0,
        "log": []
      },
      {
        "id": 2,
        "description": "should compute the square root of 2 as 2",
        "suite": [
          "sqrt"
        ],
        "success": false,
        "skipped": false,
        "time": 1,
        "log": [
          "Expected 1.414213562373095 to equal 2.\n@http://localhost:9876/base/foo.spec.js?1387461078000:12\n"
        ]
      }
    ]
  },
  "summary": {
    "success": 0,
    "failed": 3,
    "error": true,
    "disconnected": false,
    "exitCode": 1
  }
}