_$jscoverage is not defined | blanket 1.2.1 about blanket

[NedalKouissi]

@alex-seville, what up brother !

[thom4parisot]

I encountered this issue as well and reverted to 1.1.9 too to make it work.

[westy92]

I just experienced this same error. What are you reverting to version 1.9.1?

[NedalKouissi]

@westy92 npm install --save-dev [email protected], you may need sudo :)

[westy92]

If 1.2.1 is the latest version, how can 1.9.1 exist? Something doesn't add up. Do you mean 1.1.9?

[NedalKouissi]

@westy92 yes you're right!

[alex-seville]

I've published a new version, 1.2.2. Let me know if it changes anything.

[thom4parisot]

Hm sadly I still encounter the issue with [email protected]. Here is the trace:

> mocha -r env-test -r blanket -R html-cov test/*.js > coverage.html

/Users/oncletom/workspace/freebird/feed-parser/node_modules/blanket/src/index.js:179
                            throw e;
                            ^

Error: BLANKET-Error parsing instrumented code: ReferenceError: _$jscoverage is not defined
    at /Users/oncletom/workspace/freebird/feed-parser/node_modules/blanket/src/index.js:177:37
    at Object.__dirname.blanket._blanket.instrumentSync (/Users/oncletom/workspace/freebird/feed-parser/node_modules/blanket/src/blanket.js:134:21)
    at Object.__dirname.blanket._blanket.instrument (/Users/oncletom/workspace/freebird/feed-parser/node_modules/blanket/src/blanket.js:141:22)
    at Object.require.extensions..js (/Users/oncletom/workspace/freebird/feed-parser/node_modules/blanket/src/index.js:158:25)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Module.require (module.js:354:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/Users/oncletom/workspace/freebird/feed-parser/test/parse-feed.js:3:11)
    at Module._compile (module.js:410:26)
    at Module._extensions..js (module.js:417:10)
    at Object.require.extensions..js (/Users/oncletom/workspace/freebird/feed-parser/node_modules/blanket/src/index.js:144:17)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Module.require (module.js:354:17)
    at require (internal/module.js:12:17)
    at /Users/oncletom/workspace/freebird/feed-parser/node_modules/mocha/lib/mocha.js:219:27
    at Array.forEach (native)
    at Mocha.loadFiles (/Users/oncletom/workspace/freebird/feed-parser/node_modules/mocha/lib/mocha.js:216:14)
    at Mocha.run (/Users/oncletom/workspace/freebird/feed-parser/node_modules/mocha/lib/mocha.js:468:10)
    at Object.<anonymous> (/Users/oncletom/workspace/freebird/feed-parser/node_modules/mocha/bin/_mocha:403:18)
    at Module._compile (module.js:410:26)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Function.Module.runMain (module.js:442:10)
    at startup (node.js:136:18)
    at node.js:966:3

And a partial npm ls:

├─┬ [email protected]
│ ├── [email protected]
│ ├─┬ [email protected]
│ │ └── [email protected]
│ ├── [email protected]
│ ├── [email protected]
│ └── [email protected]

[ufocoder]

+1

[alex-seville]

Hmm, it's working on travis CI at [email protected] - https://travis-ci.org/alex-seville/blanket/jobs/110242642

[vaunus]

Same issue here when trying to use "use strict"; at the top of some of my project files using blanket 1.2.2.

A very simple example of this:
test.js:

let abc = 123;

Error: BLANKET-Error parsing instrumented code: SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode

Fine, so I add use strict:
test.js:

'use strict';
let abc = 123;

And the output:

# mocha --require blanket test.js
/Volumes/workspace/sss/mobile-api/node_modules/blanket/src/index.js:179
                            throw e;
                            ^

Error: BLANKET-Error parsing instrumented code: ReferenceError: _$jscoverage is not defined
    at /Volumes/workspace/sss/mobile-api/node_modules/blanket/src/index.js:177:37
    at Object.__dirname.blanket._blanket.instrumentSync (/Volumes/workspace/sss/mobile-api/node_modules/blanket/src/blanket.js:134:21)
    at Object.__dirname.blanket._blanket.instrument (/Volumes/workspace/sss/mobile-api/node_modules/blanket/src/blanket.js:141:22)
    at Object.require.extensions..js (/Volumes/workspace/sss/mobile-api/node_modules/blanket/src/index.js:158:25)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Module.require (module.js:367:17)
    at require (internal/module.js:16:19)
    at /Volumes/workspace/sss/mobile-api/node_modules/mocha/lib/mocha.js:219:27
    at Array.forEach (native)
    at Mocha.loadFiles (/Volumes/workspace/sss/mobile-api/node_modules/mocha/lib/mocha.js:216:14)
    at Mocha.run (/Volumes/workspace/sss/mobile-api/node_modules/mocha/lib/mocha.js:468:10)
    at Object.<anonymous> (/Volumes/workspace/sss/mobile-api/node_modules/mocha/bin/_mocha:403:18)
    at Module._compile (module.js:413:34)
    at Object.Module._extensions..js (module.js:422:10)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Function.Module.runMain (module.js:447:10)
    at startup (node.js:141:18)
    at node.js:933:3

Snippet from my package.json:

"blanket": {
  "pattern": "///[\\w-_]+\\.js$/",
    "data-cover-never": [
      "/node_modules/",
      "/test/"
    ],
    "data-cover-ecmaVersion": 6,
    "data-cover-reporter-options": {
      "relativepath": true
    }
}

Tested on various versions of Node 4 and 5.

[alex-seville]

Sounds like you're using ES6, you'll need to let Blanket know:
https://github.com/alex-seville/blanket/blob/master/docs/options.md#data-cover-ecmaversion

[vaunus]

I have already let Blanket know I'm using ES6. See the snippet from my package.json above which has the "data-cover-ecmaVersion": 6 parameter.

We are using ES6 throughout our codebase but have had to wrap most ES6 files in a function wrapper to get Blanket to work. This doesn't work for top-level files however such as app.js. As soon as I add "use strict"; to this I get this error so we are unable to use ES6 features in these files.

I can reproduce this in a simple example:
test.js:

var abc = 123;

mocha --require blanket test.js 
  0 passing (2ms)

However:
test.js:

'use strict';
var abc = 123;

# mocha --require blanket test.js 
/usr/local/lib/node_modules/blanket/src/index.js:179
                            throw e;
                            ^

Error: BLANKET-Error parsing instrumented code: ReferenceError: _$jscoverage is not defined
    at /usr/local/lib/node_modules/blanket/src/index.js:177:37
    at Object.__dirname.blanket._blanket.instrumentSync (/usr/local/lib/node_modules/blanket/src/blanket.js:134:21)
    at Object.__dirname.blanket._blanket.instrument (/usr/local/lib/node_modules/blanket/src/blanket.js:141:22)
    at Object.require.extensions..js (/usr/local/lib/node_modules/blanket/src/index.js:158:25)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Module.require (module.js:367:17)
    at require (internal/module.js:16:19)
    at /usr/local/lib/node_modules/mocha/lib/mocha.js:219:27
    at Array.forEach (native)
    at Mocha.loadFiles (/usr/local/lib/node_modules/mocha/lib/mocha.js:216:14)
    at Mocha.run (/usr/local/lib/node_modules/mocha/lib/mocha.js:468:10)
    at Object.<anonymous> (/usr/local/lib/node_modules/mocha/bin/_mocha:403:18)
    at Module._compile (module.js:413:34)
    at Object.Module._extensions..js (module.js:422:10)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Function.Module.runMain (module.js:447:10)
    at startup (node.js:141:18)
    at node.js:933:3

[abienkowski]

This is has been around for a long time, originally report Dec.2013.

I need to run npm install [email protected] to make my tests run.

[markvandenbrink]

Same problem here (_$jscoverage is not defined) when using 1.2.1 or 1.2.2. Reverting back to 1.1.9 as workaround.

[frankred]

Same with me...

[sbefort]

Same with me...

[rlk833]

Same here. Busted. We absolutely need ecmaVersion 6. Tried going to a lower version and other problems occur because of no ecmaVersion 6 support.

[kousha-icracked]

I'm having the same problem when using ES6. Running 1.1.9 causes another problem:

Error: BLANKET-Error parsing instrumented code: Error: BLANKET-Error parsing instrumented code: Error: BLANKET-Error parsing instrumented code: Error: Line 17: Unexpected token )

Anyone has a solution?

[rbudiharso]

I'm having this problem too with blanket 1.2.3

[selfagency]

I too am having this problem with 1.2.3 using es6

> [email protected] test /Users/ds/Dev/nylon-web
> multi='dot=- html-cov=coverage.html' ./node_modules/mocha/bin/mocha -r blanket --reporter mocha-multi --no-colors "src/app/app.js"

/Users/ds/Dev/nylon-web/node_modules/blanket/src/index.js:180
                            throw e;
                            ^

Error: BLANKET-Error parsing instrumented code: ReferenceError: _$jscoverage is not defined
    at /Users/ds/Dev/nylon-web/node_modules/blanket/src/index.js:178:37
    at Object.__dirname.blanket._blanket.instrumentSync (/Users/ds/Dev/nylon-web/node_modules/blanket/src/blanket.js:134:21)
    at Object.__dirname.blanket._blanket.instrument (/Users/ds/Dev/nylon-web/node_modules/blanket/src/blanket.js:141:22)
    at Object.require.extensions..js (/Users/ds/Dev/nylon-web/node_modules/blanket/src/index.js:159:25)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Module.require (module.js:367:17)
    at require (internal/module.js:20:19)
    at /Users/ds/Dev/nylon-web/node_modules/mocha/lib/mocha.js:222:27
    at Array.forEach (native)
    at Mocha.loadFiles (/Users/ds/Dev/nylon-web/node_modules/mocha/lib/mocha.js:219:14)
    at Mocha.run (/Users/ds/Dev/nylon-web/node_modules/mocha/lib/mocha.js:487:10)
    at Object.<anonymous> (/Users/ds/Dev/nylon-web/node_modules/mocha/bin/_mocha:459:18)
    at Module._compile (module.js:413:34)
    at Object.Module._extensions..js (module.js:422:10)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Function.Module.runMain (module.js:447:10)
    at startup (node.js:148:18)
    at node.js:405:3