I've created all the unit tests for the 5 requested cases. Here's a summary:

Backend Tests (Laravel/PHPUnit)

1. back/tests/Feature/ProcesoAdmisionPublicadosTest.php
•  Tests that /api/procesos-admision/publicados returns only processes with publicado=true
•  Verifies empty array returned when no published processes exist
•  Confirms ordering by id descending

2. back/tests/Feature/ProcesoAdmisionUpdateNullableTest.php
•  Tests that update method sets nullable fields to null when empty values are provided
•  Covers date fields, link fields, and text fields
•  Verifies fields not in request remain unchanged

Frontend Tests (Vitest)

3. front/tests/store/procesosAdmisionStore.test.js
•  Tests fetchProcesosPublicados action fetches and updates state
•  Covers loading states, error handling, and API endpoint verification

4. front/tests/components/ConvocatoriasSection.test.js
•  Tests rendering of main card for first process and secondary cards for remaining
•  Verifies estado label mapping, action button events, and empty state

5. front/tests/components/WebPage.test.js
•  Tests showModal function displays correct detalle information
•  Covers all tipo cases (requisitos, pagos, vacantes, cronograma)
•  Handles edge cases: missing proceso, empty detalles, null values

To Run Tests

Backend:
cd back && php artisan test
bash
Frontend (after installing dependencies):
cd front && npm install && npm test
bash