How do you use Istanbul Code Coverage with transpiled Typescript?

Question

I\'ve been reading articles on this all morning trying to get my environment setup correctly. But for some reason I\'m not getting it. My setup-

/app
    ... sou         


        

Answer 1

None of the examples provided worked for my Node.JS project (written in TypeScript). I wanted to run unit tests in Jasmine, and covered by Istanbul.

I ended up getting it working with the following.

package.json:

{
  "scripts": {
    "lint": "tslint 'src/**/*.ts'",
    "remap": "./node_modules/.bin/remap-istanbul -i ./coverage/coverage-final.json -t html -o ./coverage && rimraf ./coverage/dist",
    "test": "npm run lint && rimraf dist coverage && tsc --project tsconfig-test.json && ./node_modules/.bin/istanbul cover ./node_modules/.bin/jasmine JASMINE_CONFIG_PATH=jasmine.json && npm run remap"
  },
  "devDependencies": {
    "@types/jasmine": "2.8.6",
    "@types/node": "9.6.6",
    "istanbul": "0.4.5",
    "jasmine": "3.1.0",
    "remap-istanbul": "0.11.1",
    "rimraf": "2.6.2",
    "tslint": "5.9.1",
    "typescript": "2.8.1"
  }
}

jasmine.json

{
  "spec_dir": "dist",
  "spec_files": [
    "**/*.spec.js"
  ],
  "stopSpecOnExpectationFailure": false,
  "random": false
}

.istanbul.yml

instrumentation:
  root: ./dist
  excludes: ['**/*.spec.js', '**/fixtures/*.js']
  include-all-sources: true
reporting:
  reports:
    - html
    - json
    - text-summary
  dir: ./coverage

tsconfig-test.json

{
  "compilerOptions": {
    "declaration": true,
    "lib": [
      "dom",
      "es6"
    ],
    "module": "commonjs",
    "noImplicitAny": true,
    "outDir": "dist",
    "sourceMap": true,
    "target": "es5"
  },
  "include": [
    "src/**/*.ts"
  ],
  "exclude": [
    "node_modules"
  ]
}