Throw error if there are no checkbox items

alphagov · Sep 20, 2023 · df9c59a · df9c59a
1 parent cf41055
commit df9c59a
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Showing 2 changed files with 23 additions and 1 deletion.
diff --git a/packages/govuk-frontend/src/govuk/components/checkboxes/checkboxes.mjs b/packages/govuk-frontend/src/govuk/components/checkboxes/checkboxes.mjs
@@ -40,7 +40,11 @@ export class Checkboxes extends GOVUKFrontendComponent {
     /** @satisfies {NodeListOf<HTMLInputElement>} */
     const $inputs = $module.querySelectorAll('input[type="checkbox"]')
     if (!$inputs.length) {
-      return this
+      throw new ElementError(null, {
+        componentName: 'Checkboxes',
+        identifier: '<input type="checkbox">',
+        expectedType: HTMLElement
+      })
     }
 
     this.$module = $module

diff --git a/packages/govuk-frontend/src/govuk/components/checkboxes/checkboxes.puppeteer.test.js b/packages/govuk-frontend/src/govuk/components/checkboxes/checkboxes.puppeteer.test.js
@@ -368,6 +368,24 @@ describe('Checkboxes with multiple groups and a "None" checkbox and conditional
           message: 'Checkboxes: $module is not an instance of "HTMLElement"'
         })
       })
+
+      it('throws when the input list is empty', async () => {
+        await expect(
+          renderAndInitialise(page, 'checkboxes', {
+            params: examples.default,
+            beforeInitialisation($module) {
+              $module
+                .querySelectorAll('.govuk-checkboxes__item')
+                .forEach((item) => {
+                  item.remove()
+                })
+            }
+          })
+        ).rejects.toEqual({
+          name: 'ElementError',
+          message: 'Checkboxes: <input type="checkbox"> not found'
+        })
+      })
     })
   })
 })