add has-method

Author: prolic

src/Enum.php

@@ -267,6 +267,24 @@ final public static function getConstants()
         return self::detectConstants(get_called_class());
     }
 
+    /**
+     * Check for given value
+     * 
+     * @param static|null|bool|int|float|string $value
+     * @return bool
+     */
+    final public static function has($value)
+    {
+        if ($value instanceof static && get_class($value) === get_called_class()) {
+            return true;
+        }
+
+        $class     = get_called_class();
+        $constants = self::detectConstants($class);
+
+        return in_array($value, $constants, true);
+    }
+
     /**
      * Detect all available constants by the given class
      *

tests/MabeEnumTest/EnumTest.php

@@ -245,4 +245,15 @@ public function testNotUnserializable()
         $this->setExpectedException('LogicException');
         unserialize("O:32:\"MabeEnumTest\TestAsset\EnumBasic\":0:{}");
     }
+
+    public function testHas()
+    {
+        $enum = EnumBasic::ONE();
+
+        $this->assertFalse($enum->has('invalid'));
+        $this->assertFalse($enum->has(EnumInheritance::ONE()));
+        $this->assertTrue($enum->has(1));
+        $this->assertTrue($enum->has(EnumBasic::ONE()));
+        $this->assertTrue($enum->has(EnumBasic::ONE));
+    }
 }