Start implementing Form class.

Implement some of the basic features for the form class.

src/Form/Form.php

@@ -0,0 +1,73 @@
+<?php
+/**
+ * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
+ * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ *
+ * Licensed under The MIT License
+ * For full copyright and license information, please see the LICENSE.txt
+ * Redistributions of files must retain the above copyright notice.
+ *
+ * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ * @link          http://cakephp.org CakePHP(tm) Project
+ * @since         3.0.0
+ * @license       http://www.opensource.org/licenses/mit-license.php MIT License
+ */
+namespace Cake\Form;
+
+use Cake\Form\Schema;
+use Cake\Validation\Validator;
+
+/**
+ * Form abstraction used to create forms not tied to ORM backed models,
+ * or to other permanent datastores. Ideal for implement forms on top of
+ * API services, or contact forms.
+ *
+ */
+class Form {
+
+	protected $_schema;
+	protected $_errors = [];
+	protected $_validator;
+
+	public function schema(Schema $schema = null) {
+		if ($schema === null && empty($this->_schema)) {
+			$schema = $this->_buildSchema(new Schema());
+		}
+		if ($schema) {
+			$this->_schema = $schema;
+		}
+		return $this->_schema;
+	}
+
+	protected function _buildSchema($schema) {
+		return $schema;
+	}
+
+	public function validator(Validator $validator = null) {
+		if ($validator === null && empty($this->_validator)) {
+			$validator = $this->_buildValidator(new Validator());
+		}
+		if ($validator) {
+			$this->_validator = $validator;
+		}
+		return $this->_validator;
+	}
+
+	protected function _buildValidator($validator) {
+		return $validator;
+	}
+
+	public function isValid($data) {
+		$validator = $this->validator();
+		$this->_errors = $validator->errors($data);
+		return count($this->_errors) === 0;
+	}
+
+	public function errors() {
+		return $this->_errors;
+	}
+
+	public function execute($data) {
+	}
+
+}

tests/TestCase/Form/FormTest.php

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+<?php
+/**
+ * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
+ * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ *
+ * Licensed under The MIT License
+ * For full copyright and license information, please see the LICENSE.txt
+ * Redistributions of files must retain the above copyright notice.
+ *
+ * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ * @link          http://cakephp.org CakePHP(tm) Project
+ * @since         3.0.0
+ * @license       http://www.opensource.org/licenses/mit-license.php MIT License
+ */
+namespace Cake\Test\TestCase\Form;
+
+use Cake\Form\Form;
+use Cake\TestSuite\TestCase;
+
+/**
+ * Form test case.
+ */
+class FormTest extends TestCase {
+
+/**
+ * Test schema()
+ *
+ * @return void
+ */
+	public function testSchema() {
+		$form = new Form();
+		$schema = $form->schema();
+
+		$this->assertInstanceOf('Cake\Form\Schema', $schema);
+		$this->assertSame($schema, $form->schema(), 'Same instance each time');
+
+		$schema = $this->getMock('Cake\Form\Schema');
+		$this->assertSame($schema, $form->schema($schema));
+		$this->assertSame($schema, $form->schema());
+	}
+
+/**
+ * Test validator()
+ *
+ * @return void
+ */
+	public function testValidator() {
+		$form = new Form();
+		$validator = $form->validator();
+
+		$this->assertInstanceOf('Cake\Validation\Validator', $validator);
+		$this->assertSame($validator, $form->validator(), 'Same instance each time');
+
+		$schema = $this->getMock('Cake\Validation\Validator');
+		$this->assertSame($validator, $form->validator($validator));
+		$this->assertSame($validator, $form->validator());
+	}
+
+/**
+ * Test isValid method.
+ *
+ * @return void
+ */
+	public function testIsValid() {
+		$form = new Form();
+		$form->validator()
+			->add('email', 'format', ['rule' => 'email'])
+			->add('body', 'length', ['rule' => ['minLength', 12]]);
+
+		$data = [
+			'email' => 'rong',
+			'body' => 'too short'
+		];
+		$this->assertFalse($form->isValid($data));
+		$this->assertCount(2, $form->errors());
+
+		$data = [
+			'email' => 'test@example.com',
+			'body' => 'Some content goes here'
+		];
+		$this->assertTrue($form->isValid($data));
+		$this->assertCount(0, $form->errors());
+	}
+
+	public function testExecuteInvalid() {
+	}
+
+	public function testExecuteValid() {
+	}
+
+}