Enum::get() An instance of the called class will return an enum of the same value of the called class

Author: marc-mabe

src/MabeEnum/Enum.php

@@ -123,13 +123,17 @@ final public function getOrdinal()
     /**
      * Get an enum of the given value
      *
-     * @param null|boolean|int|float|string $value
+     * @param static|null|boolean|int|float|string $value
      * @return static
      * @throws InvalidArgumentException On an unknwon or invalid value
      * @throws LogicException           On ambiguous constant values
      */
     final static public function get($value)
     {
+        if ($value instanceof static) {
+            $value = $value->getValue();
+        }
+
         $class     = get_called_class();
         $constants = self::detectConstants($class);
         $name      = array_search($value, $constants, true);

tests/MabeEnumTest/EnumTest.php

@@ -3,6 +3,7 @@
 namespace MabeEnumTest;
 
 use MabeEnumTest\TestAsset\EnumBasic;
+use MabeEnumTest\TestAsset\EnumBasic2;
 use MabeEnumTest\TestAsset\EnumInheritance;
 use MabeEnumTest\TestAsset\EnumAmbiguous;
 use PHPUnit_Framework_TestCase as TestCase;
@@ -90,6 +91,37 @@ public function testGetWithInvalidTypeOfValueThrowsInvalidArgumentException()
         EnumBasic::get(array());
     }
 
+    public function testGetByInstance()
+    {
+        $enum1 = EnumBasic::get(EnumBasic::ONE);
+        $enum2 = EnumBasic::get($enum1);
+        $this->assertSame($enum1, $enum2);
+    }
+
+    public function testGetByInheritInstance()
+    {
+        $enumInherit = EnumInheritance::get(EnumInheritance::ONE);
+        $enum1       = EnumBasic::get(EnumBasic::ONE);
+        $enum2       = EnumBasic::get($enumInherit);
+        $this->assertSame($enum1, $enum2);
+    }
+
+    public function testGetByInheritInstanceThrowsInvalidArgumentExceptionOnUnknownValue()
+    {
+        $enumInherit = EnumInheritance::get(EnumInheritance::INHERITANCE);
+
+        $this->setExpectedException('InvalidArgumentException');
+        EnumBasic::get($enumInherit);
+    }
+
+    public function testGetByInstanceOfDifferentBaseThrowsInvalidArgumentException()
+    {
+        $enumDiff = EnumBasic2::get(EnumBasic2::ONE);
+
+        $this->setExpectedException('InvalidArgumentException');
+        EnumBasic::get($enumDiff);
+    }
+
     public function testGetAllValues()
     {
         $constants = EnumBasic::getConstants();

tests/MabeEnumTest/TestAsset/EnumBasic2.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace MabeEnumTest\TestAsset;
+
+use MabeEnum\Enum;
+
+/**
+ * Unit tests for the class MabeEnum\Enum
+ *
+ * @link http://github.com/marc-mabe/php-enum for the canonical source repository
+ * @copyright Copyright (c) 2013 Marc Bennewitz
+ * @license http://github.com/marc-mabe/php-enum/blob/master/LICENSE.txt New BSD License
+ */
+class EnumBasic2 extends Enum
+{
+    const ONE   = 1;
+    const TWO   = 2;
+    const THREE = 3;
+    const FOUR  = 4;
+    const FIVE  = 5;
+    const SIX   = 6;
+    const SEVEN = 7;
+    const EIGHT = 8;
+    const NINE  = 9;
+    const ZERO  = 0;
+
+    const FLOAT         = 0.123;
+    const STR           = 'str';
+    const STR_EMPTY     = '';
+    const NIL           = null;
+    const BOOLEAN_TRUE  = true;
+    const BOOLEAN_FALSE = false;
+}