cakephp/tests/TestCase/View/Form/EntityContextTest.php

<?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\View\Form;

use ArrayIterator;
use ArrayObject;
use Cake\Collection\Collection;
use Cake\Network\Request;
use Cake\ORM\Entity;
use Cake\ORM\Table;
use Cake\ORM\TableRegistry;
use Cake\TestSuite\TestCase;
use Cake\Validation\Validator;
use Cake\View\Form\EntityContext;

/**
 * Test stub.
 */
class Article extends Entity {

/**
 * Testing stub method.
 *
 * @return bool
 */
	public function isRequired() {
		return true;
	}

}

/**
 * Entity context test case.
 */
class EntityContextTest extends TestCase {

/**
 * Fixtures to use.
 *
 * @var array
 */
	public $fixtures = ['core.articles', 'core.comments'];

/**
 * setup method.
 *
 * @return void
 */
	public function setUp() {
		parent::setUp();
		$this->request = new Request();
	}

/**
 * Test getting primary key data.
 *
 * @return void
 */
	public function testPrimaryKey() {
		$row = new Article();
		$context = new EntityContext($this->request, [
			'entity' => $row,
		]);
		$this->assertEquals(['id'], $context->primaryKey());
	}

/**
 * Test isPrimaryKey
 *
 * @return void
 */
	public function testIsPrimaryKey() {
		$row = new Article();
		$context = new EntityContext($this->request, [
			'entity' => $row,
		]);
		$this->assertTrue($context->isPrimaryKey('id'));
		$this->assertFalse($context->isPrimaryKey('title'));
		$this->assertTrue($context->isPrimaryKey('1.id'));
		$this->assertTrue($context->isPrimaryKey('Articles.1.id'));
		$this->assertTrue($context->isPrimaryKey('comments.0.id'));
		$this->assertTrue($context->isPrimaryKey('1.comments.0.id'));
		$this->assertFalse($context->isPrimaryKey('1.comments.0.comment'));
		$this->assertFalse($context->isPrimaryKey('Articles.1.comments.0.comment'));
	}

/**
 * Test isCreate on a single entity.
 *
 * @return void
 */
	public function testIsCreateSingle() {
		$row = new Article();
		$context = new EntityContext($this->request, [
			'entity' => $row,
		]);
		$this->assertTrue($context->isCreate());

		$row->isNew(false);
		$this->assertFalse($context->isCreate());

		$row->isNew(true);
		$this->assertTrue($context->isCreate());
	}

/**
 * Test isCreate on a collection.
 *
 * @dataProvider collectionProvider
 * @return void
 */
	public function testIsCreateCollection($collection) {
		$context = new EntityContext($this->request, [
			'entity' => $collection,
		]);
		$this->assertTrue($context->isCreate());
	}

/**
 * Test an invalid table scope throws an error.
 *
 * @expectedException \RuntimeException
 * @expectedExceptionMessage Unable to find table class for current entity
 */
	public function testInvalidTable() {
		$row = new \StdClass();
		$context = new EntityContext($this->request, [
			'entity' => $row,
		]);
	}

/**
 * Tests that passing a plain entity will give an error as it cannot be matched
 *
 * @expectedException \RuntimeException
 * @expectedExceptionMessage Unable to find table class for current entity
 */
	public function testDefaultEntityError() {
		$context = new EntityContext($this->request, [
			'entity' => new \Cake\ORM\Entity,
		]);
	}

/**
 * Tests that the table can be derived from the entity source if it is present
 *
 * @return void
 */
	public function testTableFromEntitySource() {
		$entity = new Entity;
		$entity->source('Articles');
		$context = new EntityContext($this->request, [
			'entity' => $entity,
		]);
		$expected = ['id', 'author_id', 'title', 'body', 'published'];
		$this->assertEquals($expected, $context->fieldNames());
	}

/**
 * Test operations with no entity.
 *
 * @return void
 */
	public function testOperationsNoEntity() {
		$context = new EntityContext($this->request, [
			'table' => 'Articles'
		]);

		$this->assertNull($context->val('title'));
		$this->assertFalse($context->isRequired('title'));
		$this->assertFalse($context->hasError('title'));
		$this->assertEquals('string', $context->type('title'));
		$this->assertEquals([], $context->error('title'));

		$attrs = $context->attributes('title');
		$this->assertArrayHasKey('length', $attrs);
		$this->assertArrayHasKey('precision', $attrs);
	}

/**
 * Test operations that lack a table argument.
 *
 * @return void
 */
	public function testOperationsNoTableArg() {
		$row = new Article([
			'title' => 'Test entity',
			'body' => 'Something new'
		]);
		$row->errors('title', ['Title is required.']);

		$context = new EntityContext($this->request, [
			'entity' => $row,
		]);

		$result = $context->val('title');
		$this->assertEquals($row->title, $result);

		$result = $context->error('title');
		$this->assertEquals($row->errors('title'), $result);
		$this->assertTrue($context->hasError('title'));
	}

/**
 * Test collection operations that lack a table argument.
 *
 * @dataProvider collectionProvider
 * @return void
 */
	public function testCollectionOperationsNoTableArg($collection) {
		$context = new EntityContext($this->request, [
			'entity' => $collection,
		]);

		$result = $context->val('0.title');
		$this->assertEquals('First post', $result);

		$result = $context->error('1.body');
		$this->assertEquals(['Not long enough'], $result);
	}

/**
 * Data provider for testing collections.
 *
 * @return array
 */
	public static function collectionProvider() {
		$one = new Article([
			'title' => 'First post',
			'body' => 'Stuff',
			'user' => new Entity(['username' => 'mark'])
		]);
		$one->errors('title', 'Required field');

		$two = new Article([
			'title' => 'Second post',
			'body' => 'Some text',
			'user' => new Entity(['username' => 'jose'])
		]);
		$two->errors('body', 'Not long enough');

		return [
			'array' => [[$one, $two]],
			'basic iterator' => [new ArrayObject([$one, $two])],
			'array iterator' => [new ArrayIterator([$one, $two])],
			'collection' => [new Collection([$one, $two])],
		];
	}

/**
 * Test operations on a collection of entities.
 *
 * @dataProvider collectionProvider
 * @return void
 */
	public function testValOnCollections($collection) {
		$context = new EntityContext($this->request, [
			'entity' => $collection,
			'table' => 'Articles',
		]);

		$result = $context->val('0.title');
		$this->assertEquals('First post', $result);

		$result = $context->val('0.user.username');
		$this->assertEquals('mark', $result);

		$result = $context->val('1.title');
		$this->assertEquals('Second post', $result);

		$result = $context->val('1.user.username');
		$this->assertEquals('jose', $result);

		$this->assertNull($context->val('nope'));
		$this->assertNull($context->val('99.title'));
	}

/**
 * Test operations on a collection of entities when prefixing with the
 * table name
 *
 * @dataProvider collectionProvider
 * @return void
 */
	public function testValOnCollectionsWithRootName($collection) {
		$context = new EntityContext($this->request, [
			'entity' => $collection,
			'table' => 'Articles',
		]);

		$result = $context->val('Articles.0.title');
		$this->assertEquals('First post', $result);

		$result = $context->val('Articles.0.user.username');
		$this->assertEquals('mark', $result);

		$result = $context->val('Articles.1.title');
		$this->assertEquals('Second post', $result);

		$result = $context->val('Articles.1.user.username');
		$this->assertEquals('jose', $result);

		$this->assertNull($context->val('Articles.99.title'));
	}

/**
 * Test error operations on a collection of entities.
 *
 * @dataProvider collectionProvider
 * @return void
 */
	public function testErrorsOnCollections($collection) {
		$context = new EntityContext($this->request, [
			'entity' => $collection,
			'table' => 'Articles',
		]);

		$this->assertTrue($context->hasError('0.title'));
		$this->assertEquals(['Required field'], $context->error('0.title'));
		$this->assertFalse($context->hasError('0.body'));

		$this->assertFalse($context->hasError('1.title'));
		$this->assertEquals(['Not long enough'], $context->error('1.body'));
		$this->assertTrue($context->hasError('1.body'));

		$this->assertFalse($context->hasError('nope'));
		$this->assertFalse($context->hasError('99.title'));
	}

/**
 * Test schema operations on a collection of entities.
 *
 * @dataProvider collectionProvider
 * @return void
 */
	public function testSchemaOnCollections($collection) {
		$this->_setupTables();
		$context = new EntityContext($this->request, [
			'entity' => $collection,
			'table' => 'Articles',
		]);

		$this->assertEquals('string', $context->type('0.title'));
		$this->assertEquals('text', $context->type('1.body'));
		$this->assertEquals('string', $context->type('0.user.username'));
		$this->assertEquals('string', $context->type('1.user.username'));
		$this->assertEquals('string', $context->type('99.title'));
		$this->assertNull($context->type('0.nope'));

		$expected = ['length' => 255, 'precision' => null];
		$this->assertEquals($expected, $context->attributes('0.user.username'));
	}

/**
 * Test validation operations on a collection of entities.
 *
 * @dataProvider collectionProvider
 * @return void
 */
	public function testValidatorsOnCollections($collection) {
		$this->_setupTables();

		$context = new EntityContext($this->request, [
			'entity' => $collection,
			'table' => 'Articles',
			'validator' => [
				'Articles' => 'create',
				'Users' => 'custom',
			]
		]);
		$this->assertFalse($context->isRequired('nope'));

		$this->assertTrue($context->isRequired('0.title'));
		$this->assertTrue($context->isRequired('0.user.username'));
		$this->assertFalse($context->isRequired('1.body'));

		$this->assertTrue($context->isRequired('99.title'));
		$this->assertFalse($context->isRequired('99.nope'));
	}

/**
 * Test reading data.
 *
 * @return void
 */
	public function testValBasic() {
		$row = new Article([
			'title' => 'Test entity',
			'body' => 'Something new'
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);
		$result = $context->val('title');
		$this->assertEquals($row->title, $result);

		$result = $context->val('body');
		$this->assertEquals($row->body, $result);

		$result = $context->val('nope');
		$this->assertNull($result);
	}

/**
 * Test reading array values from an entity.
 *
 * @return void
 */
	public function testValGetArrayValue() {
		$row = new Article([
			'title' => 'Test entity',
			'types' => [1, 2, 3],
			'author' => new Entity([
				'roles' => ['admin', 'publisher']
			])
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);
		$result = $context->val('types');
		$this->assertEquals($row->types, $result);

		$result = $context->val('author.roles');
		$this->assertEquals($row->author->roles, $result);
	}

/**
 * Test that val() reads from the request.
 *
 * @return void
 */
	public function testValReadsRequest() {
		$this->request->data = [
			'title' => 'New title',
			'notInEntity' => 'yes',
		];
		$row = new Article([
			'title' => 'Test entity',
			'body' => 'Something new'
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);
		$this->assertEquals('New title', $context->val('title'));
		$this->assertEquals('yes', $context->val('notInEntity'));
		$this->assertEquals($row->body, $context->val('body'));
	}

/**
 * Test reading values from associated entities.
 *
 * @return void
 */
	public function testValAssociated() {
		$row = new Article([
			'title' => 'Test entity',
			'user' => new Entity([
				'username' => 'mark',
				'fname' => 'Mark'
			]),
			'comments' => [
				new Entity(['comment' => 'Test comment']),
				new Entity(['comment' => 'Second comment']),
			]
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);

		$result = $context->val('user.fname');
		$this->assertEquals($row->user->fname, $result);

		$result = $context->val('comments.0.comment');
		$this->assertEquals($row->comments[0]->comment, $result);

		$result = $context->val('comments.1.comment');
		$this->assertEquals($row->comments[1]->comment, $result);

		$result = $context->val('comments.0.nope');
		$this->assertNull($result);

		$result = $context->val('comments.0.nope.no_way');
		$this->assertNull($result);
	}

/**
 * Tests that trying to get values from missing associations returns null
 *
 * @return void
 */
	public function testValMissingAssociation() {
		$row = new Article([
			'id' => 1
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);

		$result = $context->val('id');
		$this->assertEquals($row->id, $result);
		$this->assertNull($context->val('profile.id'));
	}

/**
 * Test reading values from associated entities.
 *
 * @return void
 */
	public function testValAssociatedHasMany() {
		$row = new Article([
			'title' => 'First post',
			'user' => new Entity([
				'username' => 'mark',
				'fname' => 'Mark',
				'articles' => [
					new Article(['title' => 'First post']),
					new Article(['title' => 'Second post']),
				]
			]),
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);

		$result = $context->val('user.articles.0.title');
		$this->assertEquals('First post', $result);

		$result = $context->val('user.articles.1.title');
		$this->assertEquals('Second post', $result);
	}

/**
 * Test reading values for magic _ids input
 *
 * @return void
 */
	public function testValAssociatedDefaultIds() {
		$row = new Article([
			'title' => 'First post',
			'user' => new Entity([
				'username' => 'mark',
				'fname' => 'Mark',
				'groups' => [
					new Entity(['title' => 'PHP', 'id' => 1]),
					new Entity(['title' => 'Javascript', 'id' => 2]),
				]
			]),
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);

		$result = $context->val('user.groups._ids');
		$this->assertEquals([1, 2], $result);
	}

/**
 * Test reading values for magic _ids input
 *
 * @return void
 */
	public function testValAssociatedCustomIds() {
		$row = new Article([
			'title' => 'First post',
			'user' => new Entity([
				'username' => 'mark',
				'fname' => 'Mark',
				'groups' => [
					new Entity(['title' => 'PHP', 'thing' => 1]),
					new Entity(['title' => 'Javascript', 'thing' => 4]),
				]
			]),
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);

		TableRegistry::get('Users')->belongsToMany('Groups');
		TableRegistry::get('Groups')->primaryKey('thing');

		$result = $context->val('user.groups._ids');
		$this->assertEquals([1, 4], $result);
	}

/**
 * Test validator for boolean fields.
 *
 * @return void
 */
	public function testIsRequiredBooleanField() {
		$this->_setupTables();

		$context = new EntityContext($this->request, [
			'entity' => new Entity(),
			'table' => 'Articles',
		]);
		$articles = TableRegistry::get('Articles');
		$articles->schema()->addColumn('comments_on', [
			'type' => 'boolean'
		]);

		$validator = $articles->validator();
		$validator->add('comments_on', 'is_bool', [
			'rule' => 'boolean'
		]);
		$articles->validator('default', $validator);

		$this->assertFalse($context->isRequired('title'));
	}

/**
 * Test validator as a string.
 *
 * @return void
 */
	public function testIsRequiredStringValidator() {
		$this->_setupTables();

		$context = new EntityContext($this->request, [
			'entity' => new Entity(),
			'table' => 'Articles',
			'validator' => 'create',
		]);

		$this->assertTrue($context->isRequired('title'));
		$this->assertFalse($context->isRequired('body'));

		$this->assertFalse($context->isRequired('Herp.derp.derp'));
		$this->assertFalse($context->isRequired('nope'));
		$this->assertFalse($context->isRequired(''));
	}

/**
 * Test isRequired on associated entities.
 *
 * @return void
 */
	public function testIsRequiredAssociatedHasMany() {
		$this->_setupTables();

		$comments = TableRegistry::get('Comments');
		$validator = $comments->validator();
		$validator->add('user_id', 'number', [
			'rule' => 'numeric',
		]);

		$row = new Article([
			'title' => 'My title',
			'comments' => [
				new Entity(['comment' => 'First comment']),
				new Entity(['comment' => 'Second comment']),
			]
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
			'validator' => 'default',
		]);

		$this->assertTrue($context->isRequired('comments.0.user_id'));
		$this->assertFalse($context->isRequired('comments.0.other'));
		$this->assertFalse($context->isRequired('user.0.other'));
		$this->assertFalse($context->isRequired(''));
	}

/**
 * Test isRequired on associated entities with custom validators.
 *
 * Ensures that missing associations use the correct entity class
 * so provider methods work correctly.
 *
 * @return void
 */
	public function testIsRequiredAssociatedCustomValidator() {
		$this->_setupTables();
		$users = TableRegistry::get('Users');
		$articles = TableRegistry::get('Articles');

		$validator = $articles->validator();
		$validator->notEmpty('title', 'nope', function ($context) {
			return $context['providers']['entity']->isRequired();
		});
		$articles->validator('default', $validator);

		$row = new Entity([
			'username' => 'mark'
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Users',
			'validator' => 'default',
		]);

		$this->assertTrue($context->isRequired('articles.0.title'));
	}

/**
 * Test isRequired on associated entities.
 *
 * @return void
 */
	public function testIsRequiredAssociatedHasManyMissingObject() {
		$this->_setupTables();

		$comments = TableRegistry::get('Comments');
		$validator = $comments->validator();
		$validator->allowEmpty('comment', function ($context) {
			return $context['providers']['entity']->isNew();
		});

		$row = new Article([
			'title' => 'My title',
			'comments' => [
				new Entity(['comment' => 'First comment'], ['markNew' => false]),
			]
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
			'validator' => 'default',
		]);

		$this->assertTrue(
			$context->isRequired('comments.0.comment'),
			'comment is required as object is not new'
		);
		$this->assertFalse(
			$context->isRequired('comments.1.comment'),
			'comment is not required as missing object is "new"'
		);
	}

/**
 * Test isRequired on associated entities with custom validators.
 *
 * @return void
 */
	public function testIsRequiredAssociatedValidator() {
		$this->_setupTables();

		$row = new Article([
			'title' => 'My title',
			'comments' => [
				new Entity(['comment' => 'First comment']),
				new Entity(['comment' => 'Second comment']),
			]
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
			'validator' => [
				'Articles' => 'create',
				'Comments' => 'custom'
			]
		]);

		$this->assertTrue($context->isRequired('title'));
		$this->assertFalse($context->isRequired('body'));
		$this->assertTrue($context->isRequired('comments.0.comment'));
		$this->assertTrue($context->isRequired('comments.1.comment'));
	}

/**
 * Test isRequired on associated entities.
 *
 * @return void
 */
	public function testIsRequiredAssociatedBelongsTo() {
		$this->_setupTables();

		$row = new Article([
			'title' => 'My title',
			'user' => new Entity(['username' => 'Mark']),
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
			'validator' => [
				'Articles' => 'create',
				'Users' => 'custom'
			]
		]);

		$this->assertTrue($context->isRequired('user.username'));
		$this->assertFalse($context->isRequired('user.first_name'));
	}

/**
 * Test type() basic
 *
 * @return void
 */
	public function testType() {
		$this->_setupTables();

		$row = new Article([
			'title' => 'My title',
			'body' => 'Some content',
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);

		$this->assertEquals('string', $context->type('title'));
		$this->assertEquals('text', $context->type('body'));
		$this->assertEquals('integer', $context->type('user_id'));
		$this->assertNull($context->type('nope'));
	}

/**
 * Test getting types for associated records.
 *
 * @return void
 */
	public function testTypeAssociated() {
		$this->_setupTables();

		$row = new Article([
			'title' => 'My title',
			'user' => new Entity(['username' => 'Mark']),
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);

		$this->assertEquals('string', $context->type('user.username'));
		$this->assertEquals('text', $context->type('user.bio'));
		$this->assertNull($context->type('user.nope'));
	}

/**
 * Test attributes for fields.
 *
 * @return void
 */
	public function testAttributes() {
		$this->_setupTables();

		$row = new Article([
			'title' => 'My title',
			'user' => new Entity(['username' => 'Mark']),
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);

		$expected = [
			'length' => 255, 'precision' => null
		];
		$this->assertEquals($expected, $context->attributes('title'));

		$expected = [
			'length' => null, 'precision' => null
		];
		$this->assertEquals($expected, $context->attributes('body'));

		$expected = [
			'length' => 10, 'precision' => 3
		];
		$this->assertEquals($expected, $context->attributes('user.rating'));
	}

/**
 * Test hasError
 *
 * @return void
 */
	public function testHasError() {
		$this->_setupTables();

		$row = new Article([
			'title' => 'My title',
			'user' => new Entity(['username' => 'Mark']),
		]);
		$row->errors('title', []);
		$row->errors('body', 'Gotta have one');
		$row->errors('user_id', ['Required field']);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);

		$this->assertFalse($context->hasError('title'));
		$this->assertFalse($context->hasError('nope'));
		$this->assertTrue($context->hasError('body'));
		$this->assertTrue($context->hasError('user_id'));
	}

/**
 * Test hasError on associated records
 *
 * @return void
 */
	public function testHasErrorAssociated() {
		$this->_setupTables();

		$row = new Article([
			'title' => 'My title',
			'user' => new Entity(['username' => 'Mark']),
		]);
		$row->errors('title', []);
		$row->errors('body', 'Gotta have one');
		$row->user->errors('username', ['Required']);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);

		$this->assertTrue($context->hasError('user.username'));
		$this->assertFalse($context->hasError('user.nope'));
		$this->assertFalse($context->hasError('no.nope'));
	}

/**
 * Test error
 *
 * @return void
 */
	public function testError() {
		$this->_setupTables();

		$row = new Article([
			'title' => 'My title',
			'user' => new Entity(['username' => 'Mark']),
		]);
		$row->errors('title', []);
		$row->errors('body', 'Gotta have one');
		$row->errors('user_id', ['Required field']);

		$row->user->errors('username', ['Required']);

		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);

		$this->assertEquals([], $context->error('title'));

		$expected = ['Gotta have one'];
		$this->assertEquals($expected, $context->error('body'));

		$expected = ['Required'];
		$this->assertEquals($expected, $context->error('user.username'));
	}

/**
 * Test error on associated entities.
 *
 * @return void
 */
	public function testErrorAssociatedHasMany() {
		$this->_setupTables();

		$comments = TableRegistry::get('Comments');
		$row = new Article([
			'title' => 'My title',
			'comments' => [
				new Entity(['comment' => '']),
				new Entity(['comment' => 'Second comment']),
			]
		]);
		$row->comments[0]->errors('comment', ['Is required']);
		$row->comments[0]->errors('article_id', ['Is required']);

		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
			'validator' => 'default',
		]);

		$this->assertEquals([], $context->error('title'));
		$this->assertEquals([], $context->error('comments.0.user_id'));
		$this->assertEquals([], $context->error('comments.0'));
		$this->assertEquals(['Is required'], $context->error('comments.0.comment'));
		$this->assertEquals(['Is required'], $context->error('comments.0.article_id'));
		$this->assertEquals([], $context->error('comments.1'));
		$this->assertEquals([], $context->error('comments.1.comment'));
		$this->assertEquals([], $context->error('comments.1.article_id'));
	}

/**
 * Setup tables for tests.
 *
 * @return void
 */
	protected function _setupTables() {
		$articles = TableRegistry::get('Articles');
		$articles->belongsTo('Users');
		$articles->hasMany('Comments');
		$articles->entityClass(__NAMESPACE__ . '\Article');

		$comments = TableRegistry::get('Comments');
		$users = TableRegistry::get('Users');
		$users->hasMany('Articles');

		$articles->schema([
			'id' => ['type' => 'integer', 'length' => 11, 'null' => false],
			'title' => ['type' => 'string', 'length' => 255],
			'user_id' => ['type' => 'integer', 'length' => 11, 'null' => false],
			'body' => ['type' => 'text']
		]);
		$users->schema([
			'id' => ['type' => 'integer', 'length' => 11],
			'username' => ['type' => 'string', 'length' => 255],
			'bio' => ['type' => 'text'],
			'rating' => ['type' => 'decimal', 'length' => 10, 'precision' => 3],
		]);

		$validator = new Validator();
		$validator->add('title', 'minlength', [
			'rule' => ['minlength', 10]
		])
		->add('body', 'maxlength', [
			'rule' => ['maxlength', 1000]
		])->allowEmpty('body');
		$articles->validator('create', $validator);

		$validator = new Validator();
		$validator->add('username', 'length', [
			'rule' => ['minlength', 10]
		]);
		$users->validator('custom', $validator);

		$validator = new Validator();
		$validator->add('comment', 'length', [
			'rule' => ['minlength', 10]
		]);
		$comments->validator('custom', $validator);
	}

/**
 * Test the fieldnames method.
 *
 * @return void
 */
	public function testFieldNames() {
		$context = new EntityContext($this->request, [
			'entity' => new Entity(),
			'table' => 'Articles',
		]);
		$articles = TableRegistry::get('Articles');
		$this->assertEquals($articles->schema()->columns(), $context->fieldNames());
	}

/**
 * Test automatic entity provider setting
 *
 * @return void
 */
	public function testValidatorEntityProvider() {
		$row = new Article([
			'title' => 'Test entity',
			'body' => 'Something new'
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);
		$context->isRequired('title');
		$articles = TableRegistry::get('Articles');
		$this->assertSame($row, $articles->validator()->provider('entity'));

		$row = new Article([
			'title' => 'First post',
			'user' => new Entity([
				'username' => 'mark',
				'fname' => 'Mark',
				'articles' => [
					new Article(['title' => 'First post']),
					new Article(['title' => 'Second post']),
				]
			]),
		]);
		$context = new EntityContext($this->request, [
			'entity' => $row,
			'table' => 'Articles',
		]);

		$validator = $articles->validator();
		$context->isRequired('user.articles.0.title');
		$this->assertSame($row->user->articles[0], $validator->provider('entity'));

		$context->isRequired('user.articles.1.title');
		$this->assertSame($row->user->articles[1], $validator->provider('entity'));

		$context->isRequired('title');
		$this->assertSame($row, $validator->provider('entity'));
	}

}