karma-json-to-file-reporter

Karma reporter that save JSON messages from log to file

A simple Karma reporter for harvesting json messages from matchers and specs, filtering and saving to file.

It's extremely useful for creating custom CI artifacts with reports or important information.

Installation

Install from NPM:

npm install --save-dev karma-json-to-file-reporter

Or add karma-json-reporter as a devDependency in your package.json.

{
  "devDependencies": {
    "karma": "^3.0.0",
    "karma-json-reporter": "*"
  }
}

Usage

Use it as a usual reporter. Add config to karma.conf.js:

{
	"jsonToFileReporter": {
		"outputPath": "tests/out/"
	},
	"plugins": [
		"karma-json-to-file-reporter"
	],
	"reporters": ["json-to-file"]
}

JSON messages logged via console.log(_) will be filtered and saved to local json file you specified in config.

In you spec code you just need to log your JSON object as string or object:

let obj = {msg: "hello world!"};
console.log(JSON.stringify(obj)); // as string
console.log({foo: "bar"}); // or as object

##Output data

[
  {
    "msg": "hello world!"
  },
  {
    "foo": "bar"
  }
]

Config

outputPath

Path for your json output file. By default it will save your files in the root of your project.

Default: ""

fileName

File name pattern. You can use wildcards:

• *timestamp* - for current karma run timestamp.
• *index* - for log entry index: 1, 2, 3, etc.

Default: "logFile_start-timestamp.json"

overwrite

Set it true to overwrite files if it already exists. If false, log entries will be added to the end

Default: undefined

filter

Filter for json objects. This option can be:

• String. Filter JSONs by field on the root level
• Predicate function. (obj: Object) => boolean

Default: undefined