Official Cucumber.js Pretty Formatter

The Cucumber.js pretty formatter logs your feature suite in its original Gherkin form. It offers custom style themes.

Install

The pretty formatter requires:

• Node.js 10, 12, 14 or 15.

• Cucumber.js 7.0 and above.

  npm install --save-dev @cucumber/pretty-formatter @cucumber/cucumber

There are pretty formatters for older versions of Cucumber.

Usage

cucumber-js -f @cucumber/pretty-formatter

We recommend using Cucumber profiles to specify formatters.

Theme customisation

You can define your own colors by passing a theme format option:

--format-options '{"theme": <THEME_JSON>}'

Where THEME_JSON is in the following shape:

{"feature keyword": ["magenta", "bold"], "scenario keyword": ["red"]}

The customisable theme items are:

• datatable border
• datatable content
• datatable: all data table elements (border and content)
• docstring content: multiline argument content
• docstring delimiter: multiline argument delimiter: """
• feature description
• feature keyword
• feature name
• location: location comments added to the right of feature and scenario names
• rule keyword
• rule name
• scenario keyword
• scenario name
• step keyword
• step message: usually a failing step error message and stack trace
• step status: additional styles added to the built-in styles applied by Cucumber to non-passing steps status. Foreground colors have no effects on this item, background and modifiers do.
• step text
• tag

You can combine all the styles you'd like from modifiers, foreground colors and background colors exposed by ansi-styles.

Extending the Default Theme

If you just want to tweak a few things about the default theme without redefining it entirely, you can grab the default theme in your cucumber.js config file and use it as the base for yours:

const { DEFAULT_THEME } = require('@cucumber/pretty-formatter')

module.exports = {
  default: {
    formatOptions: {
      theme: {
        ...DEFAULT_THEME,
        'step text': 'magenta'
      }
    }
  }
}

Example Themes

Matrix

It could be called eco-friendly, cuz it's very green:

--format-options '{"theme":{"datatable border":["green"],"datatable content":["green","italic"],"docstring content":["green","italic"],"docstring delimiter":["green"],"feature description":["green"],"feature keyword":["bold","green"],"rule keyword":["yellow"],"scenario keyword":["greenBright"],"scenario name":["green","underline"],"step keyword":["bgGreen","black","italic"],"step text":["greenBright","italic"],"tag":["green"]}}'

Legacy pretty

This was the theme offered by Ilya Kozhevnikov's pretty formatter, pre-Cucumber.js 7.x.

--format-options '{"theme":{"feature keyword":["magenta","bold"],"scenario keyword":["magenta","bold"],"step keyword":["bold"]}}'

We need more themes

Please share your creations by forking, adding the theme to this section of the README and opening a pull request.

Older Cucumber versions

If you're using an older version of Cucumber.js, you'll need to use one of the previous pretty formatters:

Cucumber.js 1 → 2

The original pretty formatter used to ship with Cucumber. Simply specify it when invoking Cucumber:

cucumber-js -f pretty

Cucumber.js 3 → 6

You can install cucumber-pretty, created by Ilya Kozhevnikov.

• Cucumber.js 3, 4, 5: npm i --save-dev cucumber-pretty@1.5
• Cucumber.js 6: npm i --save-dev cucumber-pretty@6

Tell Cucumber to use it:

cucumber-js -f cucumber-pretty

Credits

This project is based on the original work of Ilya Kozhevnikov. It got migrated to TypeScript, upgraded for Cucumber.js 7+ that exposes cucumber-messages and is currently maintained by Julien Biezemans and the Cucumber team.