public function testFormatExceptions()
 {
     $e = new \LogicException('bar');
     $e2 = new \RuntimeException('foo', 0, $e);
     $data = ['exception' => $e2];
     $normalized = $this->normalizer->normalize($data);
     $this->assertTrue(isset($normalized['exception']['previous']));
     unset($normalized['exception']['previous']);
     $this->assertEquals(['exception' => ['class' => get_class($e2), 'message' => $e2->getMessage(), 'code' => $e2->getCode(), 'file' => $e2->getFile() . ':' . $e2->getLine(), 'trace' => $e->getTraceAsString()]], $normalized);
 }