This maybe fixes and closes #3

src/Config/Config.php

@@ -28,12 +28,12 @@ class Config extends ArrayObject implements ConfigInterface {
 	private $storage = [];
 
 	/**
-	 * @var
+	 * @var array
 	 */
-	private $temp;
+	private $temp = [];
 
 	/**
-	 * @var
+	 * @var mixed
 	 */
 	private $default;
 
@@ -68,7 +68,7 @@ public function get( string $key, $default = null ) {
 		$this->default = $default;
 
 		if ( ! $this->has( $key ) ) {
-			return $this->default;
+			return $default;
 		}
 
 		// The class::temp variable is always setted by the class::has() method
@@ -80,6 +80,7 @@ public function get( string $key, $default = null ) {
 	 */
 	public function has( string $key ) : bool {
 		$this->temp = $this->search( $this->storage, $key, $this->default );
+		$this->default = null;
 		return isset( $this->temp );
 	}
 
@@ -148,29 +149,37 @@ public function toJson(): string {
 		return \json_encode( $this->toArray() );
 	}
 
+	/**
+	 *
+	 */
+	public function __clone() {
+		$this->storage = [];
+		parent::exchangeArray( $this->storage );
+	}
+
 	/**
 	 * @link https://www.php.net/manual/en/class.arrayobject.php#107079
 	 *
 	 * @param $func
 	 * @param $argv
 	 * @return mixed
 	 */
-	public function __call( $func, $argv ) {
-
-		if ( \array_key_exists( $func, $this->storage ) && \is_callable( $this->storage[ $func ] ) ) {
-			codecept_debug( $argv );
-			$new_func = function ( ...$argv ) use ( $func ) {
-				return $func( $argv );
-			};
-			return \call_user_func_array( $new_func, $argv );
-		}
-
-		if ( ! \is_callable( $func ) || \substr( $func, 0, 6 ) !== 'array_' ) {
-			throw new BadMethodCallException(__CLASS__ . '->' . $func );
-		}
-
-		return \call_user_func_array( $func, \array_merge( [ $this->getArrayCopy() ], $argv ) );
-	}
+//	public function __call( $func, $argv ) {
+//
+//		if ( \array_key_exists( $func, $this->storage ) && \is_callable( $this->storage[ $func ] ) ) {
+//			codecept_debug( $argv );
+//			$new_func = function ( ...$argv ) use ( $func ) {
+//				return $func( $argv );
+//			};
+//			return \call_user_func_array( $new_func, $argv );
+//		}
+//
+//		if ( ! \is_callable( $func ) || \substr( $func, 0, 6 ) !== 'array_' ) {
+//			throw new BadMethodCallException(__CLASS__ . '->' . $func );
+//		}
+//
+//		return \call_user_func_array( $func, \array_merge( [ $this->getArrayCopy() ], $argv ) );
+//	}
 
 	/**
 	 * @todo In future move this method to its own class

tests/unit/ConfigTest.php

@@ -105,6 +105,39 @@ public function it_should_have_and_get_key()
 		$this->assertArrayHasKey( 'subKey', $config->get( 'recursive' ) );
     }
 
+    /**
+     * @test
+     * it should have key
+     */
+    public function it_should_reset_default_member_on_every_call_and_only_return_value_if_exist()
+    {
+        $config = new Config( [ 'key' => 'value' ] );
+		$this->assertFalse( $config->has( 'some-key' ) );
+		$this->assertFalse( $config->has( 'some-key' ) );
+		$this->assertStringContainsString(
+			\strval( $config->get( 'some-key', 'default value' ) ),
+			'default value',
+			''
+		);
+		$this->assertFalse( $config->has( 'some-key' ) );
+		$this->assertStringContainsString(
+			\strval( $config->get( 'some-key', 'other default value' ) ),
+			'other default value',
+			''
+		);
+
+		$this->assertFalse( $config->has( 'some-key' ) );
+		$this->assertEmpty( $config->get( 'some-key' ), '' );
+
+		$this->assertStringContainsString(
+			\strval( $config->get( 'some-key', 'other default value' ) ),
+			'other default value',
+			''
+		);
+		$this->assertEmpty( $config->get( 'some-key' ), '' );
+		$this->assertFalse( $config->has( 'some-key' ) );
+    }
+
     /**
      * @test
      * it should get_key
@@ -416,12 +449,12 @@ public function it_shoud_return_valid_json() {
 	/**
 	 * @test
 	 */
-	public function it_shoud_call_builtin_array_functions() {
-		$keys = \array_keys( $this->config_arr );
-
-		$config = new Config( $this->config_arr );
-		$this->assertEquals( $keys, $config->array_keys() );
-    }
+//	public function it_shoud_call_builtin_array_functions() {
+//		$keys = \array_keys( $this->config_arr );
+//
+//		$config = new Config( $this->config_arr );
+//		$this->assertEquals( $keys, $config->array_keys() );
+//    }
 
 	/**
 	 * @test
@@ -449,6 +482,25 @@ public function it_shoud_search_subkeys() {
 		$this->assertEquals( 'subSubValue', $config->get( 'key.subSubKey.subSubKeyKey' ), '' );
 	}
 
+	/**
+	 * @test
+	 */
+	public function it_should_clone_have_empty_value() {
+		$arr = [ 'key'	=> 'value' ];
+		$config = new Config( $arr );
+
+		$this->assertStringContainsString( \strval( $config->get( 'key' ) ), $arr['key'], '' );
+		$this->assertTrue( $config->has( 'key' ), '' );
+		$this->assertNotEmpty( $config->get( 'key' ), '' );
+
+		$clone = clone $config;
+
+		$this->assertFalse( $clone->has( 'key' ), '' );
+		$this->assertEmpty( $clone->get( 'key' ), '' );
+
+		$this->assertNotSame( $config, $clone, '' );
+	}
+
 	/**
 	 * @test
 	 */