(not design) pattern : simple factory

SimpleFactory/Bicycle.php

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+<?php
+
+/*
+ * DesignPatternPHP
+ */
+
+namespace DesignPatterns\SimpleFactory;
+
+/**
+ * Bicycle is a bicycle
+ */
+class Bicycle implements Vehicle
+{
+
+    public function driveTo($destination)
+    {
+        
+    }
+
+}

SimpleFactory/ConcreteFactory.php

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+<?php
+
+/*
+ * DesignPatternPHP
+ */
+
+namespace DesignPatterns\SimpleFactory;
+
+/**
+ * ConcreteFactory is a simple factory pattern.
+ * 
+ * It differs from the static factory because it is NOT static and as you
+ * know : static => global => evil
+ * 
+ * Therefore, you can haZ multiple factories, differently parametrized, 
+ * you can subclass it and you can mock-up it.
+ */
+class ConcreteFactory
+{
+
+    protected $typeList;
+
+    /**
+     * You can imagine to inject your own type list or merge with
+     * the default ones...
+     */
+    public function __construct()
+    {
+        $this->typeList = array(
+            'bicycle' => __NAMESPACE__ . '\Bicycle',
+            'other' => __NAMESPACE__ . '\Scooter'
+        );
+    }
+
+    /**
+     * Creates a vehicle
+     * 
+     * @param string $type a known type key
+     * @return Vehicle a new instance of Vehicle
+     * @throws \InvalidArgumentException
+     */
+    public function createVehicle($type)
+    {
+        if (!array_key_exists($type, $this->typeList)) {
+            throw new \InvalidArgumentException("$type is not valid vehicle");
+        }
+        $className = $this->typeList[$type];
+
+        return new $className();
+    }
+
+}

SimpleFactory/Scooter.php

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+<?php
+
+/*
+ * DesignPatternPHP
+ */
+
+namespace DesignPatterns\SimpleFactory;
+
+/**
+ * Scooter is a Scooter
+ */
+class Scooter implements Vehicle
+{
+
+    public function driveTo($destination)
+    {
+        
+    }
+
+}

SimpleFactory/Vehicle.php

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+<?php
+
+/*
+ * DesignPatternPHP
+ */
+
+namespace DesignPatterns\SimpleFactory;
+
+/**
+ * Vehicle is a contract for a vehicle
+ */
+interface Vehicle
+{
+
+    function driveTo($destination);
+}

Tests/SimpleFactory/SimpleFactoryTest.php

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+<?php
+
+/*
+ * DesignPatternPHP
+ */
+
+namespace DesignPatterns\Tests\SimpleFactory;
+
+use DesignPatterns\SimpleFactory\ConcreteFactory;
+
+/**
+ * SimpleFactoryTest tests the Simple Factory pattern
+ *
+ * @author flo
+ */
+class SimpleFactoryTest extends \PHPUnit_Framework_TestCase
+{
+
+    protected $factory;
+
+    protected function setUp()
+    {
+        $this->factory = new ConcreteFactory();
+    }
+
+    public function getType()
+    {
+        return array(
+            array('bicycle'),
+            array('other')
+        );
+    }
+
+    /**
+     * @dataProvider getType
+     */
+    public function testCreation($type)
+    {
+        $obj = $this->factory->createVehicle($type);
+        $this->assertInstanceOf('DesignPatterns\SimpleFactory\Vehicle', $obj);
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     */
+    public function testBadType()
+    {
+        $this->factory->createVehicle('car');
+    }
+
+}