Add unit tests and usage example to README

More/EAV/Tests/AttributeTest.php

@@ -0,0 +1,66 @@
+<?php
+
+namespace DesignPatterns\More\EAV\Tests;
+
+use DesignPatterns\More\EAV\Attribute;
+use DesignPatterns\More\EAV\Value;
+
+/**
+ * AttributeTest tests the Attribute model of EAV pattern
+ */
+class AttributeTest extends \PHPUnit_Framework_TestCase
+{
+    public function testCreationSuccess()
+    {
+        $attribute = new Attribute();
+
+        $this->assertInstanceOf('\DesignPatterns\More\EAV\Attribute', $attribute);
+    }
+
+    /**
+     * @depends testCreationSuccess
+     */
+    public function testSetGetName()
+    {
+        $attribute = new Attribute();
+        $attribute->setName('Color');
+
+        $this->assertEquals('Color', $attribute->getName());
+    }
+
+    /**
+     * @depends testCreationSuccess
+     */
+    public function testAddValue()
+    {
+        $attribute = new Attribute();
+        $attribute->setName('Color');
+
+        $values[] = (new Value($attribute))->setName('Silver');
+        $values[] = (new Value($attribute))->setName('Gold');
+        $values[] = (new Value($attribute))->setName('Space Grey');
+
+        $this->assertEquals($values, $attribute->getValues());
+    }
+
+    /**
+     * @depends testAddValue
+     */
+    public function testRemoveValue()
+    {
+        $values = [];
+
+        $attribute = new Attribute();
+        $attribute->setName('Color');
+
+        $values[] = (new Value($attribute))->setName('Silver');
+        $values[] = (new Value($attribute))->setName('Gold');
+        $values[] = (new Value($attribute))->setName('Space Grey');
+
+        $randomIndex = array_rand($values);
+        $attribute->removeValue($values[$randomIndex]);
+        unset($values[$randomIndex]);
+
+        $this->assertEquals($values, $attribute->getValues());
+    }
+}