Fix radio, checkbox and select

src/vue-testing-library.js

@@ -110,22 +110,19 @@ fireEvent.update = async (elem, value) => {
 
   switch (tagName) {
     case 'OPTION': {
-      elem.selected = value
+      elem.selected = true
 
-      const parentElement =
-        this.element.parentElement.tagName === 'OPTGROUP'
-          ? this.element.parentElement.parentElement
-          : this.element.parentElement
+      const parentSelectElement =
+        elem.parentElement.tagName === 'OPTGROUP'
+          ? elem.parentElement.parentElement
+          : elem.parentElement
 
-      return fireEvent.change(parentElement)
+      return fireEvent.change(parentSelectElement)
     }
 
     case 'INPUT': {
-      if (type === 'checkbox') {
-        elem.checked = value
-        return fireEvent.change(elem)
-      } else if (type === 'radio') {
-        elem.selected = value
+      if (['checkbox', 'radio'].includes(type)) {
+        elem.checked = true
         return fireEvent.change(elem)
       } else {
         elem.value = value

tests/__tests__/components/Form.vue

@@ -26,14 +26,6 @@
         Awful
       </label>
 
-      <label for="genre-select">Movie genre</label>
-      <select id="genre-select" v-model="genre">
-        <option>Comedy</option>
-        <option>Action</option>
-        <option>Romance</option>
-        <option>None of the above</option>
-      </select>
-
       <label id="recommend-label">Would you recommend this movie?</label>
       <input
         id="recommend"
@@ -56,7 +48,6 @@ export default {
       title: '',
       review: '',
       rating: '1',
-      genre: 'Comedy',
       recommend: false
     }
   },
@@ -73,7 +64,6 @@ export default {
         title: this.title,
         review: this.review,
         rating: this.rating,
-        genre: this.genre,
         recommend: this.recommend
       })
     }

tests/__tests__/components/Select.vue

@@ -0,0 +1,25 @@
+<template>
+  <div>
+    <label for="dino-select">Choose a dinosaur:</label>
+    <select id="dino-select" v-model="selectedDino">
+      <option value="dino1">Tyrannosaurus</option>
+      <option value="dino2">Velociraptor</option>
+      <option value="dino3">Deinonychus</option>
+      <optgroup label="Sauropods">
+        <option value="dino4">Diplodocus</option>
+        <option value="dino5">Saltasaurus</option>
+        <option value="dino6">Apatosaurus</option>
+      </optgroup>
+    </select>
+  </div>
+</template>
+
+<script>
+export default {
+  data() {
+    return {
+      selectedDino: 'dino1'
+    }
+  }
+}
+</script>

tests/__tests__/form.js

@@ -2,20 +2,23 @@ import { render, fireEvent } from '@testing-library/vue'
 import '@testing-library/jest-dom/extend-expect'
 import Form from './components/Form'
 
+// In this test we showcase several ways of targetting DOM elements.
+// However, `getByLabelText` should be your top preference when handling
+// form elements.
+// Read 'What queries should I use?' for additional context:
+// https://testing-library.com/docs/guide-which-query
 test('Review form submits', async () => {
   const fakeReview = {
     title: 'An Awesome Movie',
     review: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.',
     rating: '3',
-    genre: 'Action',
     recommend: true
   }
 
   const {
     getByLabelText,
     getByText,
     getByRole,
-    getByDisplayValue,
     getByPlaceholderText,
     emitted
   } = render(Form)
@@ -25,28 +28,30 @@ test('Review form submits', async () => {
   // Initially the submit button should be disabled
   expect(submitButton).toBeDisabled()
 
-  // In this test we showcase several ways of targetting DOM elements.
-  // However, `getByLabelText` should be your top preference when handling
-  // form elements.
-  // Read 'What queries should I use?' for additional context:
-  // https://testing-library.com/docs/guide-which-query
-
   const titleInput = getByLabelText(/title of the movie/i)
   await fireEvent.update(titleInput, fakeReview.title)
 
   const reviewTextarea = getByPlaceholderText('Write an awesome review')
   await fireEvent.update(reviewTextarea, fakeReview.review)
 
+  // Rating Radio buttons
+  const initiallySelectedInput = getByLabelText('Awful')
   const ratingSelect = getByLabelText('Wonderful')
-  await fireEvent.update(ratingSelect, fakeReview.rating)
 
-  // Get the Select element by using the initially displayed value.
-  const genreSelect = getByDisplayValue('Comedy')
-  await fireEvent.update(genreSelect, fakeReview.genre)
+  expect(initiallySelectedInput.checked).toBe(true)
+  expect(ratingSelect.checked).toBe(false)
+
+  await fireEvent.update(ratingSelect)
+
+  expect(ratingSelect.checked).toBe(true)
+  expect(initiallySelectedInput.checked).toBe(false)
 
   // Get the Input element by its implicit ARIA role.
   const recommendInput = getByRole('checkbox')
-  await fireEvent.update(recommendInput, fakeReview.recommend)
+
+  expect(recommendInput.checked).toBe(false)
+  await fireEvent.update(recommendInput)
+  expect(recommendInput.checked).toBe(true)
 
   // NOTE: in jsdom, it's not possible to trigger a form submission
   // by clicking on the submit button. This is really unfortunate.

tests/__tests__/select.js

@@ -0,0 +1,27 @@
+import { render, fireEvent } from '@testing-library/vue'
+import '@testing-library/jest-dom/extend-expect'
+import Select from './components/Select'
+
+// In this test file we showcase several ways to interact with a Select element
+test('Select component', async () => {
+  let optionElement
+  const { getByDisplayValue, getByText } = render(Select)
+
+  // Get the Select element by using the initially displayed value
+  const select = getByDisplayValue('Tyrannosaurus')
+  expect(select.value).toBe('dino1')
+
+  // Update it by manually sending a valid option value
+  await fireEvent.update(select, 'dino2')
+  expect(select.value).toBe('dino2')
+
+  // We can trigger an update event by directly getting the <option> element
+  optionElement = getByText('Deinonychus')
+  await fireEvent.update(optionElement)
+  expect(select.value).toBe('dino3')
+
+  // ...even if option is within an <optgroup>
+  optionElement = getByText('Diplodocus')
+  await fireEvent.update(optionElement)
+  expect(select.value).toBe('dino4')
+})