jest-console-group-reporter

jest-console-group-reporter

A Jest reporter that groups console messages, allows filtering, and provides flexible display configuration options.

• Written in Typescript :zap:
• Supports displaying in GitHub Actions
• Provides configuration types for type safety

Table of Contents

• Installation
• Usage
  • Basic configuration
  • Filtering console messages
  • Grouping console messages
  • Dynamic group names
  • Configuration
    • filters
    • groups
    • consoleLevels
    • afterEachTest
    • afterAllTests
    • useGitHubActions
    • onlyFailingTestSuites
  • Summary Reporter
• Known issues

Installation

Install jest-console-group-reporter using your favorite package manager:

# npm
npm install jest-console-group-reporter -D
# yarn
yarn add jest-console-group-reporter -D
# pnpm
pnpm add jest-console-group-reporter -D

Minimum requirements

• Jest 25.1
• Node.js 16

Usage

Basic configuration

To use jest-console-group-reporter with the default configuration, simply add it to your Jest configuration:

// Add the reporter to your jest config
module.exports = {
  // ...
  reporters: ["jest-console-group-reporter"],
};

If you would like to use GitHub Actions grouping, see the example here

Filtering console messages

You can filter specific console messages by providing a string, regular expression, or predicate function in the filters option:

// Add as many as you like!
const filters = ["error", /^react/];

module.exports = {
  // ...
  reporters: [["jest-console-group-reporter", { filters }]],
};

Grouping console messages

You can create custom groups by specifying them in the groups option:

// Add as many as you like!
const groups = [
  {
    name: "React console messages",
    match: /react/,
  },
];

module.exports = {
  // ...
  reporters: [["jest-console-group-reporter", { groups }]],
};

Dynamic group names

You can create dynamic group names by specifying them in the groups option:

const groups = [
  {
    name: ({ type }) => `React console.${type}`,
    match: /react/,
  },
];

module.exports = {
  // ...
  reporters: [["jest-console-group-reporter", { groups }]],
};

Configuration

Default configuration:

const defaultOptions: Options = {
  consoleLevels: ["error", "warn", "info", "debug", "log"],
  filters: [],
  groups: [],
  onlyFailingTestSuites: false,
  afterEachTest: {
    enable: true,
    reportType: "summary",
    filePaths: false,
  },
  afterAllTests: {
    reportType: "detailed",
    enable: true,
    filePaths: true,
  },
  useGitHubActions: false,
};

Here are the available configuration options:

filters

An array of regular expressions, strings, or functions to filter out console messages.

Type declaration

interface ConsoleMessage {
  type: string;
  message: string;
  origin: string | undefined;
}

type Filters = Array<string | RegExp | ((consoleMessage: ConsoleMessage) => boolean)>;

Using a predicate function

When using a predicate function, the return type must be a boolean.

Note: The origin is not available for all types of console message. So you will need to test it before using it.

interface ConsoleMessage {
  origin: string;
  type: string | undefined;
  message: string;
}

const filters = [
  ({ message }: ConsoleMessage) => message === "react",
  ({ origin }: ConsoleMessage) => origin && origin.match(/node_modules/),
  ({ type }: ConsoleMessage) => type === "error",
];

module.exports = {
  // ...
  reporters: [["jest-console-group-reporter", { filters }]],
};

groups

An array of custom groups, where each group has a name and match property. Messages matching the match criteria will be grouped under the specified name.

Note: The origin is not available for all types of console message. So you will need to test it before using it.

Type declaration

interface ConsoleMessage {
  type: string;
  message: string;
  origin: string;
}

type Matcher = string | RegExp | (({ type, message, origin }: ConsoleMessage) => boolean);

type Groups = Array<{
  match: Matcher;
  name: string | (({ type, message, origin }: ConsoleMessage) => string);
}>;

Using a predicate function

interface ConsoleMessage {
  origin: string;
  type: string | undefined;
  message: string;
}

const groups = [
  {
    name: "React warnings",
    match: ({ message, type }: ConsoleMessage) => message.match(/react/) && type === "warn",
  },
  {
    name: "Error from some module",
    match: ({ origin }: ConsoleMessage) => origin && origin.match(/some_module/),
  },
];

module.exports = {
  // ...
  reporters: [["jest-console-group-reporter", { groups }]],
};

consoleLevels

An array of console message types to capture (e.g., 'log', 'warn', 'error').

Type declaration

type ConsoleLevels = string[];

Example of only capturing error and warning messages

const consoleLevels = ["error", "warn"];

module.exports = {
  // ...
  reporters: [["jest-console-group-reporter", { consoleLevels }]],
};

afterEachTest

Configuration for displaying console messages after each test.

Type declaration

interface DisplayOptions {
  enable: boolean;
  filePaths: boolean;
  reportType: "summary" | "detailed";
}

• enable (boolean): Enable or disable displaying messages after each test.
• filePaths (boolean): Include file paths in the report.
• reportType ("summary" | "detailed"): Choose between "summary" and "detailed" report types

Disable displaying summary report after each test

const afterEachTest = {
  enable: false;
}

module.exports = {
  // ...
  reporters: [["jest-console-group-reporter", { afterEachTest }]],
};

afterAllTests

Configuration for displaying console messages after all tests have run.

Type declaration

interface DisplayOptions {
  enable: boolean;
  filePaths: boolean;
  reportType: "summary" | "detailed";
}

• enable (boolean): Enable or disable displaying messages after all tests.
• filePaths (boolean): Include file paths in the report.
• reportType ("summary" | "detailed"): Choose between "summary" and "detailed" report types.

Disable displaying filePaths

const afterAllTest = {
  filePaths: false;
}

module.exports = {
  // ...
  reporters: [["jest-console-group-reporter", { afterAllTest }]],
};

useGitHubActions

Enable GitHub Actions specific behavior. This will wrap each console message in a dropdown. You will only want to enable this property when running in github actions.

Type declaration

type UseGithubActions = boolean;

Using the is-ci package

/**
 * @see https://www.npmjs.com/package/is-ci
 */
const isCI = require("is-ci");

module.exports = {
  // ...
  reporters: [["jest-console-group-reporter", { useGithubActions: isCI }]],
};

Using a process.env variable

const useGithubActions = process.env.IS_CI;

module.exports = {
  // ...
  reporters: [["jest-console-group-reporter", { useGithubActions }]],
};

onlyFailingTestSuites

This reporter shows console messages for all tests by default. Use the onlyFailingTestSuites option to see messages only for failing test suites. Due to Jest's limitations, messages can't be filtered for individual failing tests, only for the entire failing suites.

module.exports = {
  // ...
  reporters: [["jest-console-group-reporter", { onlyFailingTestSuites: true }]],
};

Summary Reporter

The jest-console-group-reporter internally uses the summary reporter provided by Jest to display the overall test summary. You do not need to explicitly pass the summary reporter to the reporter options, as it is automatically integrated by default.

Known issues

When running Jest for a single test file (e.g. jest src/someTest.ts), the reporter is not activated. This seems to be a bug with Jest and not this reporter :)