test(VDatePicker): add range test

packages/vuetify/src/components/VDatePicker/__tests__/VDatePicker.spec.cy.tsx

@@ -0,0 +1,24 @@
+/// <reference types="../../../../types/cypress" />
+
+import { VDatePicker } from '..'
+import { Application } from '@/../cypress/templates'
+
+// Utilities
+import { ref } from 'vue'
+
+describe('VDatePicker', () => {
+  it('selects a range of dates', () => {
+    const model = ref<unknown[]>([])
+    cy.mount(() => (
+      <Application>
+        <VDatePicker v-model={ model.value } multiple="range" />
+      </Application>
+    ))
+
+    cy.get('.v-date-picker-month__day').contains(10).click()
+    cy.get('.v-date-picker-month__day').contains(20).click()
+      .then(() => {
+        expect(model.value).to.have.length(11)
+      })
+  })
+})