schema space id validation

Author: nekufa

src/Schema.php

@@ -44,6 +44,10 @@ public function getSpace($id)
             return $this->getSpace($this->getSpaceId($id));
         }
 
+        if(!$id) {
+            throw new Exception("Space id or name not defined");
+        }
+
         if(!array_key_exists($id, $this->spaces)) {
             $this->spaces[$id] = new Space($this->mapper, $id, array_search($id, $this->names));
         }

tests/SchemaTest.php

@@ -1,10 +1,19 @@
 <?php
 
+use Exception;
 use Tarantool\Mapper\Mapper;
 use Tarantool\Mapper\Space;
 
 class SchemaTest extends TestCase
 {
+    public function testNoSpaceException()
+    {
+        $mapper = $this->createMapper();
+        $this->clean($mapper);
+        $this->expectException(Exception::class);
+        $space = $mapper->getSchema()->getSpace(null);
+    }
+
     public function testEmptySpace()
     {
         $mapper = $this->createMapper();