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EduardoGR adding strategy context in order to complete the pattern

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egarcia
2017-10-31 03:51:44 +01:00
parent 3ea7462991
commit 16f09e99e7
3 changed files with 28 additions and 50 deletions
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23
Behavioral/Strategy/Context.php Normal file
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@ -0,0 +1,23 @@
<?php
namespace DesignPatterns\Behavioral\Strategy;
class Context
{
/**
* @var ComparatorInterface
*/
private $comparator;
public function __construct(ComparatorInterface $comparator)
{
$this->comparator = $comparator;
}
public function executeStrategy(array $elements) : array
{
uasort($elements, [$this->comparator, 'compare']);
return $elements;
}
}

43
Behavioral/Strategy/ObjectCollection.php
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@ -1,43 +0,0 @@
<?php
namespace DesignPatterns\Behavioral\Strategy;
class ObjectCollection
{
/**
* @var array
*/
private $elements;
/**
* @var ComparatorInterface
*/
private $comparator;
/**
* @param array $elements
*/
public function __construct(array $elements = [])
{
$this->elements = $elements;
}
public function sort(): array
{
if (!$this->comparator) {
throw new \LogicException('Comparator is not set');
}
uasort($this->elements, [$this->comparator, 'compare']);
return $this->elements;
}
/**
* @param ComparatorInterface $comparator
*/
public function setComparator(ComparatorInterface $comparator)
{
$this->comparator = $comparator;
}
}

12
Behavioral/Strategy/Tests/StrategyTest.php
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@ -2,9 +2,9 @@
namespace DesignPatterns\Behavioral\Strategy\Tests; namespace DesignPatterns\Behavioral\Strategy\Tests;
use DesignPatterns\Behavioral\Strategy\Context;
use DesignPatterns\Behavioral\Strategy\DateComparator; use DesignPatterns\Behavioral\Strategy\DateComparator;
use DesignPatterns\Behavioral\Strategy\IdComparator; use DesignPatterns\Behavioral\Strategy\IdComparator;
use DesignPatterns\Behavioral\Strategy\ObjectCollection;
use PHPUnit\Framework\TestCase; use PHPUnit\Framework\TestCase;
class StrategyTest extends TestCase class StrategyTest extends TestCase
@ -45,9 +45,8 @@ class StrategyTest extends TestCase
*/ */
public function testIdComparator($collection, $expected) public function testIdComparator($collection, $expected)
{ {
$obj = new ObjectCollection($collection); $obj = new Context(new IdComparator());
$obj->setComparator(new IdComparator()); $elements = $obj->executeStrategy($collection);
$elements = $obj->sort();
$firstElement = array_shift($elements); $firstElement = array_shift($elements);
$this->assertEquals($expected, $firstElement); $this->assertEquals($expected, $firstElement);
@ -61,9 +60,8 @@ class StrategyTest extends TestCase
*/ */
public function testDateComparator($collection, $expected) public function testDateComparator($collection, $expected)
{ {
$obj = new ObjectCollection($collection); $obj = new Context(new DateComparator());
$obj->setComparator(new DateComparator()); $elements = $obj->executeStrategy($collection);
$elements = $obj->sort();
$firstElement = array_shift($elements); $firstElement = array_shift($elements);
$this->assertEquals($expected, $firstElement); $this->assertEquals($expected, $firstElement);