Name: tessl/npm-jest-each
Rating: 85 (1 reviews)
Author: tessl

tessl/npm-jest-each

Parameterised tests for Jest that enable running the same test multiple times with different data sets using arrays or tagged template literals

1.10x

Quality

Pending

Does it follow best practices?

Impact

85%

1.10x

Average score across 10 eval scenarios

Securityby

Pending

The risk profile of this skill

Overview

Eval results

Files

Evaluation results

100%

75%

Payment Processing System

Mock implementation (mockImplementation, mockImplementationOnce)

Criteria

Without context

With context

Uses jest.fn()

100%

Uses mockImplementation

100%

Uses mockImplementationOnce

100%

Mock return values

100%

Mock error scenarios

100%

Verifies mock calls

100%

10%

Test Suite with Database Connection Management

Lifecycle hooks (beforeAll, beforeEach, afterEach, afterAll)

Criteria

Without context

With context

beforeAll hook

100%

beforeEach hook

100%

afterEach hook

50%

100%

afterAll hook

100%

Module Call Tracker

Module mocker with metadata tracking

Criteria

Without context

With context

Uses jest.mock()

100%

Accesses mocked module

100%

Tracks call arguments

100%

Checks call count

100%

Accesses call history

100%

Clears mock state

100%

95%

User Profile Snapshot Testing

Snapshot property matchers

Criteria

Without context

With context

Uses toMatchSnapshot

100%

Property matcher object

100%

expect.any() matchers

100%

Simple property matching

100%

Nested property matching

100%

Test coverage

100%

90%

-3%

API Timeout Testing Suite

Test timeout configuration

Criteria

Without context

With context

Default timeout usage

53%

100%

Per-test timeout parameter

100%

Extended timeout configuration

100%

Timeout failure test

100%

50%

Async test handling

100%

57%

User Notification Service

Module mocking (jest.mock(), jest.unmock())

Criteria

Without context

With context

jest.mock() usage

Mock implementations

100%

Failure scenario mocking

100%

Mock verification

66%

100%

jest.unmock() usage

Mock cleanup

100%

80%

100%

User Service Test Suite

Mock return value configuration (mockReturnValue, mockResolvedValue, mockRejectedValue)

Criteria

Without context

With context

mockReturnValue usage

100%

mockResolvedValue usage

100%

mockRejectedValue usage

100%

Test structure

100%

Event Handler Test Suite

Mock function creation (jest.fn())

Criteria

Without context

With context

Mock creation

100%

Call verification

100%

Argument verification

100%

Negative assertions

100%

Test completeness

100%

TypeScript Code Transformer with Source Map Support

Source map preservation

Criteria

Without context

With context

Transformer interface implementation

100%

TypeScript compilation

100%

Source map generation

100%

Source map preservation

100%

Jest configuration

100%

Cache key implementation

100%

0%

-100%

Data Validator Test Suite

Equality matchers (toBe, toEqual, toStrictEqual)

Criteria

Without context

With context

toBe for primitives

100%

toEqual for objects

100%

toBe fails reference

100%

toEqual for arrays

100%

toEqual for nested

100%

toStrictEqual vs toEqual

100%

Evaluated: 3 months ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Payment Processing System Test Suite with Database Connection Management Module Call Tracker User Profile Snapshot Testing API Timeout Testing Suite User Notification Service User Service Test Suite Event Handler Test Suite TypeScript Code Transformer with Source Map Support Data Validator Test Suite