<?php
/*
 * This file is part of the Comparator package.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace SebastianBergmann\Comparator;

use stdClass;

/**
 * @coversDefaultClass SebastianBergmann\Comparator\ObjectComparator
 *
 * @package    Comparator
 * @author     Jeff Welch <whatthejeff@gmail.com>
 * @copyright  Sebastian Bergmann <sebastian@phpunit.de>
 * @license    http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
 * @link       http://www.github.com/sebastianbergmann/comparator
 */
class ObjectComparatorTest extends \PHPUnit_Framework_TestCase
{
    private $comparator;

    protected function setUp()
    {
        $this->comparator = new ObjectComparator;
        $this->comparator->setFactory(new Factory);
    }

    public function acceptsSucceedsProvider()
    {
        return array(
          array(new TestClass, new TestClass),
          array(new stdClass, new stdClass),
          array(new stdClass, new TestClass)
        );
    }

    public function acceptsFailsProvider()
    {
        return array(
          array(new stdClass, null),
          array(null, new stdClass),
          array(null, null)
        );
    }

    public function assertEqualsSucceedsProvider()
    {
        // cyclic dependencies
        $book1 = new Book;
        $book1->author = new Author('Terry Pratchett');
        $book1->author->books[] = $book1;
        $book2 = new Book;
        $book2->author = new Author('Terry Pratchett');
        $book2->author->books[] = $book2;

        $object1 = new SampleClass(4, 8, 15);
        $object2 = new SampleClass(4, 8, 15);

        return array(
          array($object1, $object1),
          array($object1, $object2),
          array($book1, $book1),
          array($book1, $book2),
          array(new Struct(2.3), new Struct(2.5), 0.5)
        );
    }

    public function assertEqualsFailsProvider()
    {
        $typeMessage = 'is not instance of expected class';
        $equalMessage = 'Failed asserting that two objects are equal.';

        // cyclic dependencies
        $book1 = new Book;
        $book1->author = new Author('Terry Pratchett');
        $book1->author->books[] = $book1;
        $book2 = new Book;
        $book2->author = new Author('Terry Pratch');
        $book2->author->books[] = $book2;

        $book3 = new Book;
        $book3->author = 'Terry Pratchett';
        $book4 = new stdClass;
        $book4->author = 'Terry Pratchett';

        $object1 = new SampleClass( 4,  8, 15);
        $object2 = new SampleClass(16, 23, 42);

        return array(
          array(new SampleClass(4, 8, 15), new SampleClass(16, 23, 42), $equalMessage),
          array($object1, $object2, $equalMessage),
          array($book1, $book2, $equalMessage),
          array($book3, $book4, $typeMessage),
          array(new Struct(2.3), new Struct(4.2), $equalMessage, 0.5)
        );
    }

    /**
     * @covers       ::accepts
     * @dataProvider acceptsSucceedsProvider
     */
    public function testAcceptsSucceeds($expected, $actual)
    {
        $this->assertTrue(
          $this->comparator->accepts($expected, $actual)
        );
    }

    /**
     * @covers       ::accepts
     * @dataProvider acceptsFailsProvider
     */
    public function testAcceptsFails($expected, $actual)
    {
        $this->assertFalse(
          $this->comparator->accepts($expected, $actual)
        );
    }

    /**
     * @covers       ::assertEquals
     * @dataProvider assertEqualsSucceedsProvider
     */
    public function testAssertEqualsSucceeds($expected, $actual, $delta = 0.0)
    {
        $exception = null;

        try {
            $this->comparator->assertEquals($expected, $actual, $delta);
        }

        catch (ComparisonFailure $exception) {
        }

        $this->assertNull($exception, 'Unexpected ComparisonFailure');
    }

    /**
     * @covers       ::assertEquals
     * @dataProvider assertEqualsFailsProvider
     */
    public function testAssertEqualsFails($expected, $actual, $message, $delta = 0.0)
    {
        $this->setExpectedException(
          'SebastianBergmann\\Comparator\\ComparisonFailure', $message
        );
        $this->comparator->assertEquals($expected, $actual, $delta);
    }
}