[#1085] Add tests

Author: mickadoo

Tests/Serializer/CallbackTest.php

@@ -0,0 +1,38 @@
+<?php
+
+use \FOS\ElasticaBundle\Serializer\Callback;
+use \Symfony\Component\Serializer\Serializer;
+
+class CallbackTest extends PHPUnit_Framework_TestCase
+{
+    public function testSerializerMustHaveSerializeMethod()
+    {
+        $callback = new Callback();
+        $this->setExpectedException(RuntimeException::class, 'The serializer must have a "serialize" method.');
+        $callback->setSerializer(new \stdClass());
+    }
+
+    public function testSetGroupsWorksWithValidSerializer()
+    {
+        $callback = new Callback();
+        $serializer = $this->prophesize(Serializer::class);
+        $callback->setSerializer($serializer->reveal());
+
+        $callback->setGroups(['foo']);
+    }
+
+    public function testSetGroupsFailsWithInvalidSerializer()
+    {
+        $callback = new Callback();
+        $serializer = $this->getMockBuilder('FakeSerializer')->setMethods(['serialize'])->getMock();
+        $callback->setSerializer($serializer);
+
+        $this->setExpectedException(
+            RuntimeException::class,
+            'Setting serialization groups requires using "JMS\Serializer\Serializer" or '
+                . '"Symfony\Component\Serializer\Serializer"'
+        );
+
+        $callback->setGroups(['foo']);
+    }
+}