Fixing risky tests

Makring tests that have no assertions with the annotation to suppress
phpunits warning around risky tests

closes 1370

Author: JimTools

Tests/JsonSerializerTest.php

@@ -17,6 +17,9 @@ public function testShouldImplementSerializerInterface()
         $this->assertClassImplements(Serializer::class, JsonSerializer::class);
     }
 
+    /**
+     * @doesNotPerformAssertions
+     */
     public function testCouldBeConstructedWithoutAnyArguments()
     {
         new JsonSerializer();

Tests/RdKafkaConsumerTest.php

@@ -13,6 +13,9 @@
 
 class RdKafkaConsumerTest extends TestCase
 {
+    /**
+     * @doesNotPerformAssertions
+     */
     public function testCouldBeConstructedWithRequiredArguments()
     {
         new RdKafkaConsumer(

Tests/RdKafkaProducerTest.php

@@ -17,6 +17,9 @@
 
 class RdKafkaProducerTest extends TestCase
 {
+    /**
+     * @doesNotPerformAssertions
+     */
     public function testCouldBeConstructedWithKafkaProducerAndSerializerAsArguments()
     {
         new RdKafkaProducer($this->createKafkaProducerMock(), $this->createSerializerMock());