From adec443d9c655c14a24ea3aa9bb91d796570e944 Mon Sep 17 00:00:00 2001
From: maximkou <maximkou@gmail.com>
Date: Sun, 2 Mar 2014 21:54:04 +0400
Subject: [PATCH] Delegation pattern

---
 Delegation/JuniorDeveloper.php      | 14 +++++++++++++
 Delegation/TeamLead.php             | 32 +++++++++++++++++++++++++++++
 Delegation/Usage.php                |  9 ++++++++
 Tests/Delegation/DelegationTest.php | 19 +++++++++++++++++
 4 files changed, 74 insertions(+)
 create mode 100644 Delegation/JuniorDeveloper.php
 create mode 100644 Delegation/TeamLead.php
 create mode 100644 Delegation/Usage.php
 create mode 100644 Tests/Delegation/DelegationTest.php

diff --git a/Delegation/JuniorDeveloper.php b/Delegation/JuniorDeveloper.php
new file mode 100644
index 0000000..e089162
--- /dev/null
+++ b/Delegation/JuniorDeveloper.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace DesignPatterns\Delegation;
+
+/**
+ * Class JuniorDeveloper
+ * @package DesignPatterns\Delegation
+ */
+class JuniorDeveloper {
+	public function writeBadCode()
+	{
+		return "Some junior developer generated code...";
+	}
+}
diff --git a/Delegation/TeamLead.php b/Delegation/TeamLead.php
new file mode 100644
index 0000000..7407f58
--- /dev/null
+++ b/Delegation/TeamLead.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace DesignPatterns\Delegation;
+
+/**
+ * Class TeamLead
+ * @package DesignPatterns\Delegation
+ * The `TeamLead` class, he delegate work to `JuniorDeveloper`
+ */
+class TeamLead
+{
+	/** @var JuniorDeveloper */
+	protected $slave;
+
+	/**
+	 * Give junior developer into teamlead submission
+	 * @param JuniorDeveloper $junior
+	 */
+	public function __construct(JuniorDeveloper $junior)
+	{
+		$this->slave = $junior;
+	}
+
+	/**
+	 * TeamLead drink coffee, junior work
+	 * @return mixed
+	 */
+	public function writeCode()
+	{
+		return $this->slave->writeBadCode();
+	}
+}
diff --git a/Delegation/Usage.php b/Delegation/Usage.php
new file mode 100644
index 0000000..0de2589
--- /dev/null
+++ b/Delegation/Usage.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace DesignPatterns\Delegation;
+
+// instantiate TeamLead and appoint to assistants JuniorDeveloper
+$teamLead = new TeamLead(new JuniorDeveloper());
+
+// team lead delegate write code to junior developer
+echo $teamLead->writeCode();
diff --git a/Tests/Delegation/DelegationTest.php b/Tests/Delegation/DelegationTest.php
new file mode 100644
index 0000000..682805b
--- /dev/null
+++ b/Tests/Delegation/DelegationTest.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace DesignPatterns\Tests\Delegation;
+
+use DesignPatterns\Delegation;
+
+/**
+ * DelegationTest tests the delegation pattern
+ */
+class DelegationTest extends \PHPUnit_Framework_TestCase
+{
+	public function testHowTeamLeadWriteCode()
+	{
+		$teamLead = new Delegation\TeamLead(
+			new Delegation\JuniorDeveloper()
+		);
+		$this->assertEquals("Some junior developer generated code...", $teamLead->writeCode());
+	}
+}