PHPLIB-143: Default URI for Client constructor

src/Client.php

@@ -28,7 +28,7 @@ class Client
      * @param array  $options       Additional connection string options
      * @param array  $driverOptions Driver-specific options
      */
-    public function __construct($uri, array $options = [], array $driverOptions = [])
+    public function __construct($uri = 'mongodb://localhost:27017', array $options = [], array $driverOptions = [])
     {
         $this->manager = new Manager($uri, $options, $driverOptions);
         $this->uri = (string) $uri;

tests/ClientTest.php

@@ -9,6 +9,13 @@ use MongoDB\Client;
  */
 class ClientTest extends TestCase
 {
+    public function testConstructorDefaultUri()
+    {
+        $client = new Client();
+
+        $this->assertEquals('mongodb://localhost:27017', (string) $client);
+    }
+
     public function testToString()
     {
         $client = new Client($this->getUri());