jest-stare

Jest HTML Reporter

This is a Jest HTML reporter. It takes summary test results from jest and parses them into an HTML file for improved readability and filtering.

Features

• filter on pass / failed tests
• side-by-side snapshot diff
• chart-summarized information
• captures raw jest results JSON file
• link to generated coverage report (if configured)
• configuration
• cli
• api

Usage

Run tests or a test with jest and specify jest-stare on the --reporters option:

• jest --reporters default jest-stare
• jest --testResultsProcessor=jest-stare

Alternatively, in your jest config within package.json set reporters to jest-stare :

• "reporters": ["default", "jest-stare"]
• "testResultsProcessor": "./node_modules/jest-stare"

jest-stare when used as a reporter updates the HTML report on each completed test run. You can use this to view test output that is incomplete (before each test suite completes). Refresh your browser to see new tests as each suite completes.

By default, after a report is generated, output will go to ./jest-stare and will contain:

• index.html - html report
• jest-results.json - raw jest json data
• /js - javascript render files
• /css - css stylings

Config

You can configure custom reporters by passing the jest-stare config as a second argument:

    "reporters": [
      "default",
      [
        "jest-stare",
        {
          "resultDir": "results/jest-stare",
          "reportTitle": "jest-stare!",
          "additionalResultsProcessors": [
            "jest-junit"
          ],
          "coverageLink": "../../coverage/lcov-report/index.html",
          "jestStareConfigJson": "jest-stare.json",
          "jestGlobalConfigJson": "globalStuff.json"
        }
      ]
    ]

Note: testResultsProcessor will not use config options specified in the way above

Or, do so by adding a jest-stare object to your package.json, for example:

jest-stare: {
    ...
}

You can also configure each option via environmental variables instead. Environmental variables take precedence over values in package.json. CLI options take precedence of environmental variables and configuration.

Within the configuration object you can specify the following fields:

Field	Environmental Variable	Default	Description	Example
resultDir	JEST_STARE_RESULT_DIR	jest-stare	set the results directory	"resultDir": "results/jest-stare"
resultJson	JEST_STARE_RESULT_JSON	jest-results.json	indicate the raw JSON results file name	"resultJson": "data.json"
resultHtml	JEST_STARE_RESULT_HTML	index.html	indicate the main html file name	"resultHtml": "main.html"
log	JEST_STARE_LOG	true	specify whether or not jest-stare should log to the console	"log": false
jestStareConfigJson	JEST_STARE_CONFIG_JSON	undefined	request to save jest-stare config raw JSON results in the file name	"jestStareConfigJson": "jest-stare-config.json"
jestGlobalConfigJson	JEST_STARE_GLOBAL_CONFIG_JSON	undefined	request to save global config results in the file name	"jestGlobalConfigJson": "global-config.json"
report	JEST_STARE_REPORT	undefined	boolean, set to false to suppress creating a HTML report (JSON only retained)	"report": false
reportTitle	JEST_STARE_REPORT_TITLE	jest-stare!	string, indicate the title of the report	"reportTitle": "my title"
reportHeadline	JEST_STARE_REPORT_HEADLINE	jest-stare	string, indicate the headline of the report	"reportHeadline": "my headline"
reportSummary	JEST_STARE_REPORT_SUMMARY	undefined	boolean, shows the report summary	"reportSummary": true
additionalResultsProcessors	JEST_STARE_ADDITIONAL_RESULTS_PROCESSORS	undefined	add additional test result processors to produce multiple report	"additionalResultsProcessors": ["jest-junit"]
coverageLink	JEST_STARE_COVERAGE_LINK	undefined	link to coverage report if available	"coverageLink": "../../coverage/lcov-report/index.html"
disableCharts	JEST_STARE_DISABLE_CHARTS	undefined	hide the doughnut charts in the HTML report	"disableCharts": true
hidePassing	JEST_STARE_HIDE_PASSING	undefined	hide passing tests in the report on page load	"hidePassing": true
hideFailing	JEST_STARE_HIDE_FAILING	undefined	hide failing tests in the report on page load	"hideFailing": true
hidePending	JEST_STARE_HIDE_PENDING	undefined	hide pending tests in the report on page load	"hidePending": true

API

You can programmatically invoke jest-stare and provide jest response data via:

// require jest-stare
const processor = require("jest-stare");

// load some jest results JSON data
const simplePassingTests = require("../__tests__/__resources__/simplePassingTests.json");

// call jest-stare processor, passing a first parm of the jest json results,
// and optionally a second parm of jest-stare config
processor(simplePassingTests, {log: false, resultDir: __dirname + "/output"});

CLI

Use the jest-stare CLI to create or recreate an HTML report. You only need to supply an input JSON file containing the jest test results.

You can invoke jest-stare as a CLI after installing globally via npm install -g jest-stare. Or if jest-stare is a local dependency you can invoke the CLI via npx jest-stare...

Assuming that you have a relative file to your current location in a folder "data" and "simplePassingTests.json" contains saved JSON output from a jest test invocation, you can run the CLI providing a single positional input jest JSON file:

jest-stare data/simplePassingTests.json

Optionally you can control where the report will be stored using a second positional:

jest-stare data/simplePassingTests.json c:/users/myId/desktop/output

The command response takes a form of:

jest-stare was called with programmatic config
**  jest-stare: wrote output report to c:/users/myId/desktop/output/index.html  **

Jest Watch

Because jest-stare writes *.js files when generating a report, you may get an infinite loop when using jest-stare and jest --watch. Samples of the problem are documented here:

• https://github.com/facebook/jest/issues/3923
• https://github.com/facebook/jest/issues/2516

To get around this problem, consider excluding jest-stare *.js files from watch via something like this:

    "watchPathIgnorePatterns": [
      ".*jest-stare.*\\.js"
    ],

Contributing

See contributing.

Acknowledgements

Thanks to dogboydog and others for additions!

This project is based on:

• jQuery
• Bootstrap
• Holder.js
• Chart.js
• diff2html