Add choice_multiple to test and fix uninitialized value

Author: Lustmored

src/LiveComponent/src/ComponentWithFormTrait.php

@@ -162,7 +162,7 @@ private function extractFormValues(FormView $formView, array $values = []): arra
         foreach ($formView->children as $child) {
             $name = $child->vars['name'];
             if (!($child->vars['expanded'] ?? false) && \count($child->children) > 0) {
-                $values[$name] = $this->extractFormValues($child, $values[$name]);
+                $values[$name] = $this->extractFormValues($child, $values[$name] ?? []);
 
                 continue;
             }

src/LiveComponent/tests/Fixture/Component/FormComponent1.php

@@ -60,6 +60,14 @@ protected function instantiateForm(): FormInterface
                 ],
                 'expanded' => true,
             ])
+            ->add('choice_multiple', ChoiceType::class, [
+                'choices' => [
+                    'foo' => 1,
+                    'bar' => 2,
+                ],
+                'expanded' => true,
+                'multiple' => true,
+            ])
             ->add('checkbox', CheckboxType::class)
             ->add('file', FileType::class)
             ->add('hidden', HiddenType::class)

src/LiveComponent/tests/Unit/Form/ComponentWithFormTest.php

@@ -30,6 +30,7 @@ public function testFormValues(): void
                 'range' => '',
                 'choice' => '',
                 'choice_expanded' => '',
+                'choice_multiple' => [],
                 'checkbox' => null,
                 'file' => '',
                 'hidden' => '',