[#MUI-33] Développer le composant Datepicker (#50)

| Numéro du ticket | Titre du ticket |
|------------------|-----------------|
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## Description de la PR

## Modification du .env

## Check list

- [x] Pas de régression
- [x] TU/TI/TF rédigée
- [x] TU/TI/TF OK
- [x] CHANGELOG modifié

Reviewed-on: #50
Co-authored-by: tristan <tristan@yuno.malio.fr>
Co-committed-by: tristan <tristan@yuno.malio.fr>

app/components/malio/date/DateTime.test.ts

@@ -0,0 +1,120 @@
+import {afterEach, beforeEach, describe, expect, it, vi} from 'vitest'
+import {mount} from '@vue/test-utils'
+import type {DefineComponent} from 'vue'
+import DateTime_ from './DateTime.vue'
+
+type DateTimeProps = {
+  id?: string
+  name?: string
+  label?: string
+  modelValue?: string | null
+  placeholder?: string
+  required?: boolean
+  disabled?: boolean
+  readonly?: boolean
+  hint?: string
+  error?: string
+  success?: string
+  min?: string
+  max?: string
+  clearable?: boolean
+  inputClass?: string
+  labelClass?: string
+  groupClass?: string
+}
+
+const DateTimeForTest = DateTime_ as DefineComponent<DateTimeProps>
+const mountDateTime = (props: DateTimeProps = {}) =>
+  mount(DateTimeForTest, {props, attachTo: document.body})
+
+describe('MalioDateTime', () => {
+  beforeEach(() => {
+    vi.useFakeTimers()
+    vi.setSystemTime(new Date(2026, 4, 19)) // 19 mai 2026
+  })
+  afterEach(() => vi.useRealTimers())
+
+  describe('rendu', () => {
+    it('affiche le label et l\'icône calendrier', () => {
+      const wrapper = mountDateTime({label: 'Rendez-vous'})
+      expect(wrapper.get('label').text()).toBe('Rendez-vous')
+      expect(wrapper.find('[data-test="calendar-icon"]').exists()).toBe(true)
+    })
+
+    it('affiche la valeur formatée date + heure dans le champ', () => {
+      const wrapper = mountDateTime({modelValue: '2026-05-20T14:30:00'})
+      const input = wrapper.get('[data-test="date-input"]').element as HTMLInputElement
+      expect(input.value).toBe('20/05/2026 14:30')
+    })
+  })
+
+  describe('popover', () => {
+    it('ouvre la grille et l\'input heure au clic', async () => {
+      const wrapper = mountDateTime()
+      await wrapper.get('[data-test="date-input"]').trigger('click')
+      expect(wrapper.find('[data-test="month-grid"]').exists()).toBe(true)
+      expect(wrapper.find('[data-test="time-input"]').exists()).toBe(true)
+    })
+  })
+
+  describe('sélection', () => {
+    it('émet le jour à 00:00 et garde le popover ouvert', async () => {
+      const wrapper = mountDateTime()
+      await wrapper.get('[data-test="date-input"]').trigger('click')
+      await wrapper.get('[data-test="day"][data-iso="2026-05-19"]').trigger('click')
+      expect(wrapper.emitted('update:modelValue')?.at(-1)).toEqual(['2026-05-19T00:00:00'])
+      expect(wrapper.find('[data-test="popover"]').exists()).toBe(true)
+    })
+
+    it('applique l\'heure réglée avant le clic du jour', async () => {
+      const wrapper = mountDateTime()
+      await wrapper.get('[data-test="date-input"]').trigger('click')
+      await wrapper.get('[data-test="time-input"]').setValue('09:15')
+      // pas d'émission tant qu'aucun jour n'est choisi
+      expect(wrapper.emitted('update:modelValue')).toBeUndefined()
+      await wrapper.get('[data-test="day"][data-iso="2026-05-19"]').trigger('click')
+      expect(wrapper.emitted('update:modelValue')?.at(-1)).toEqual(['2026-05-19T09:15:00'])
+    })
+
+    it('met à jour l\'heure quand une date est déjà choisie', async () => {
+      const wrapper = mountDateTime({modelValue: '2026-05-20T14:30:00'})
+      await wrapper.get('[data-test="date-input"]').trigger('click')
+      await wrapper.get('[data-test="time-input"]').setValue('08:45')
+      expect(wrapper.emitted('update:modelValue')?.at(-1)).toEqual(['2026-05-20T08:45:00'])
+    })
+
+    it('initialise l\'input heure depuis la valeur', async () => {
+      const wrapper = mountDateTime({modelValue: '2026-05-20T14:30:00'})
+      await wrapper.get('[data-test="date-input"]').trigger('click')
+      const time = wrapper.get('[data-test="time-input"]').element as HTMLInputElement
+      expect(time.value).toBe('14:30')
+    })
+  })
+
+  describe('bornes min/max', () => {
+    it('désactive les jours hors bornes (datetime borné sur la date)', async () => {
+      const wrapper = mountDateTime({min: '2026-05-10T00:00:00', max: '2026-05-20T00:00:00'})
+      await wrapper.get('[data-test="date-input"]').trigger('click')
+      const outside = wrapper.get('[data-test="day"][data-iso="2026-05-05"]')
+      expect((outside.element as HTMLButtonElement).disabled).toBe(true)
+    })
+  })
+
+  describe('effacement', () => {
+    it('émet null au clic sur la croix', async () => {
+      const wrapper = mountDateTime({modelValue: '2026-05-20T14:30:00'})
+      await wrapper.get('[data-test="clear"]').trigger('click')
+      expect(wrapper.emitted('update:modelValue')?.at(-1)).toEqual([null])
+    })
+  })
+
+  describe('accessibilité', () => {
+    it('positionne aria-invalid et describedby sur erreur', () => {
+      const wrapper = mountDateTime({error: 'Date requise'})
+      const input = wrapper.get('[data-test="date-input"]')
+      expect(input.attributes('aria-invalid')).toBe('true')
+      expect(input.attributes('aria-describedby')).toBeTruthy()
+      expect(wrapper.text()).toContain('Date requise')
+    })
+  })
+})