API Add ValidationInterface to Form

src/Forms/Form.php

@@ -12,6 +12,7 @@
 use SilverStripe\Control\Session;
 use SilverStripe\Core\ClassInfo;
 use SilverStripe\Core\Injector\Injector;
+use SilverStripe\Core\Validation\ValidationInterface;
 use SilverStripe\ORM\DataObjectInterface;
 use SilverStripe\ORM\FieldType\DBHTMLText;
 use SilverStripe\Core\Validation\ValidationResult;
@@ -21,7 +22,6 @@
 use SilverStripe\View\SSViewer;
 use SilverStripe\Model\ModelData;
 use SilverStripe\Forms\Validation\Validator;
-use SilverStripe\Dev\Deprecation;
 
 /**
  * Base class for all forms.
@@ -64,7 +64,7 @@
  * For example, the "URLSegment" field in a standard CMS form would be
  * accessible through "admin/EditForm/field/URLSegment/FieldHolder".
  */
-class Form extends ModelData implements HasRequestHandler
+class Form extends ModelData implements HasRequestHandler, ValidationInterface
 {
     use AttributesHTML;
     use FormMessage;
@@ -1247,18 +1247,6 @@ public function getLegend()
         return $this->legend;
     }
 
-    /**
-     * Alias of validate() for backwards compatibility.
-     *
-     * @return ValidationResult
-     * @deprecated 5.4.0 Use validate() instead
-     */
-    public function validationResult()
-    {
-        Deprecation::notice('5.4.0', 'Use validate() instead');
-        return $this->validate();
-    }
-
     /**
      * Processing that occurs before a form is executed.
      *

tests/php/Forms/FormTest.php

@@ -1364,7 +1364,7 @@ public function testValidateFormFields(array $values, bool $isValid)
         }
         $form = new Form(null, 'testForm', $fieldList, new FieldList([/* no actions */]));
 
-        $result = $form->validationResult();
+        $result = $form->validate();
         $this->assertSame($isValid, $result->isValid());
         $messages = $result->getMessages();
         if ($isValid) {

tests/php/Forms/OptionsetFieldTest.php

@@ -68,7 +68,7 @@ public function testValidation()
         $this->assertTrue($field->validate()->isValid());
 
         // ... but should not pass "RequiredFieldsValidator" validation
-        $this->assertFalse($form->validationResult()->isValid());
+        $this->assertFalse($form->validate()->isValid());
 
         // disabled items shouldn't validate
         $field->setDisabledItems(['Five']);