# JS Component Unit Tests

> Rules and guidelines for writing unit tests for JavaScript components in the scripts/ bridge layer

- Skill: `pegasystems/js-component-unit-tests` (Agent Skill)
- Install (CLI): `npx skillmds@latest add pegasystems/js-component-unit-tests`
- Raw SKILL.md: https://api.skillmd.com/api/skills/pegasystems/js-component-unit-tests/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: pegasystems (https://skillmd.com/u/pegasystems)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/pegasystems/js-component-unit-tests

---


## Writing Unit-tests for JS components
1. this.pConn should be mocked
2. PCore should be mocked if needed
3. please test the following methods:
  - init()
  - update(pConn)
  - updateSelf()
  - fieldOnChange(value, event)
  - fieldOnBlur(value,event)
  - onEvent(event)
4. test interactions with this.componentManager
5. test interactions with this.pConn
6. test interactions with PCore (if needed)
7. evaluate props sent in onComponentPropsUpdate() method of componentManager in one test if resonable