Coverage of NodeJS using Karma

Question

I try to get coverage from my project. Due to my IDE (IntelliJ) I'm using Karma with mocha. To make the tests run in karma I also added browserify. But I just get coverage of the tests not of the actual code:

Here is my karma.conf.js:

"use strict";

module.exports = function(config) {
  config.set({
    basePath: "",
    frameworks: ["mocha", "browserify"],
    files: [
      "test/**/*Test.js"
    ],
    exclude: [
        "src/Main.js"
    ],
    preprocessors: {
      "test/**/*Test.js": ["browserify"],
      "src/**/*.js": ['coverage']
    },
    reporters: ["progress", "coverage"],
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: true,
    browsers: ["Chrome"],
    singleRun: false,
    browserify: {
      debug: true,
      transform: [ "browserify-shim" ]
    }
  });
};

And an excerpt from my package.json:

{
  ...

  "dependencies": {
    "nssocket": "^0.5.3",
    "winston": "^1.0.0"
  },
  "devDependencies": {
    "browserify": "^10.2.4",
    "browserify-shim": "^3.8.8",
    "karma": "^0.12.36",
    "karma-browserify": "^4.2.1",
    "karma-coverage": "^0.4.2",
    "karma-mocha": "^0.1.10",
    "mocha": "^2.2.5"
  },
  "browserify-shim": {}
}

I've tried to add all the code-files to the karma.conf.js→files[] but then I get various Uncaught TypeError by browserify:

files: ["src/**/*.js", ...
preprocessors: {"src/**/*.js": ["browserify"], ...

UPDATE:

I created two test-files, but they have no coverage:

test/TestTest.js

"use strict";

var assert = require("assert");
var test = require('../src/Interface/Test.js');

describe("Test", function () {

    describe("Test test, 5", function () {
        it("Test true 5", function () {
            assert.equal(test.addOneOnTrue(true, 5), 6);
        });

        it("Test false", function () {
            assert.equal(test.addOneOnTrue(false, 5), 5);
        });
    });
});

src/Test.js

var Test = function() {
    this.addOneOnTrue = function (boolean, int) {
        if(boolean) {
            ++int;
        }
        return int;
    }
};

module.exports = new Test();

Answer 1

Use the following process:

• Change the preprocessor pattern for coverage to match src explicitly:

  "src/**/*.js": ["coverage"]
  

• Restart karma

• Check the report