Added comparable test

Author: Petr Knap

tests/Enum/EnumTest.php

@@ -22,7 +22,7 @@ public function wrongKeyProvider()
      * @param string $name
      * @param mixed $value
      */
-    public function testEnumMagicConstruction_GoodKey($name, $value)
+    public function testMagicConstruction_GoodKey($name, $value)
     {
         /** @var EnumMock $enum */
         $enum = EnumMock::$name();
@@ -36,7 +36,7 @@ public function testEnumMagicConstruction_GoodKey($name, $value)
      * @dataProvider wrongKeyProvider
      * @param string $name
      */
-    public function testEnumMagicConstruction_WrongKey($name)
+    public function testMagicConstruction_WrongKey($name)
     {
         $this->setExpectedException(
             get_class(new EnumException()),
@@ -47,6 +47,15 @@ public function testEnumMagicConstruction_WrongKey($name)
         EnumMock::$name();
     }
 
+    public function testComparable()
+    {
+        $this->assertSame(EnumMock::A(), EnumMock::A());
+        $this->assertNotSame(EnumMock::A(), EnumMock::B());
+
+        $this->assertTrue(EnumMock::A() == EnumMock::A());
+        $this->assertFalse(EnumMock::A() == EnumMock::B());
+    }
+
     /**
      * @dataProvider goodKeyProvider
      * @param string $name