No Coverage generated got following error

[akhileshk]

After ember-cli-code-coverage used following command "COVERAGE=true ember test" to run the test
getting following error:

{ type: 'error',
text: 'Error: Pretender intercepted POST /write-coverage but no handler was defined for this type of request at http://localhost:7357/assets/vendor.js, line 68809\n' }

Do I need to do any configuration on my end?

//env:
Package.json
"devDependencies": {
"broccoli-asset-rev": "^2.2.0",
"ember-ajax": "0.7.1",
"ember-cli": "2.5.0",
"ember-cli-app-version": "^1.0.0",
"ember-cli-babel": "^5.1.5",
"ember-cli-code-coverage": "0.2.2",
"ember-cli-dependency-checker": "^1.2.0",
"ember-cli-htmlbars": "^1.0.1",
"ember-cli-htmlbars-inline-precompile": "^0.3.1",
"ember-cli-inject-live-reload": "^1.3.1",
"ember-cli-pretender": "0.6.0",
"ember-cli-qunit": "^1.1.0",
"ember-cli-release": "0.2.8",
"ember-cli-sri": "^2.0.0",
"ember-cli-uglify": "^1.2.0",
"ember-disable-proxy-controllers": "^1.0.1",
"ember-export-application-global": "^1.0.4",
"ember-load-initializers": "0.5.1",
"ember-resolver": "^2.0.3",
"loader.js": "4.0.10"
}
Bower.json:
"dependencies": {
"ember": "2.5.0",
"ember-cli-shims": "0.1.0",
"ember-cli-test-loader": "0.2.2",
"ember-load-initializers": "0.1.7",
"ember-qunit-notifications": "0.1.0",
"jquery": "1.11.3",
"loader.js": "^3.5.0",
"qunit": "~1.20.0",
"pretender": "^0.12.0",
"bootstrap": "3.1.1",
"moment": "~2.11.1",
"markdown": "~0.5.0",
"bootstrap-tokenfield": "~0.12.1"
},

[benoror]

@akhileshk https://github.com/kategengler/ember-cli-code-coverage/#using-when-intercepting-all-ajax-requests-in-tests

[akhileshk]

this is what worked for me, as the App was not using mirage
this.post('/write-coverage', this.passthrough);

[akhileshk]

@benoror @kategengler
With the Istanbul, one can instrument the code base and run the test latter on the instrumented code, can we do some thing similar with this plugin for ember app.
The document does mentioned that :
"it instruments your application code as part of the build, when enabled."
so how do we enable code instrumentation during ember build, and generate instrumented code?,

[kategengler]

COVERAGE=true is the part that enables instrumentation of the code. You have that in the command you ran.