Add coverage information to tests, fix coverage of NodaValidationHelper

tests/NodaNameSplitterTest.php

@@ -9,6 +9,8 @@ use PHPUnit\Framework\TestCase;
 
 /**
  * This script contains tests for the actor name splitter.
+ *
+ * @covers \NodaNameSplitter
  */
 final class NodaNameSplitterTest extends TestCase {
     /**
@@ -17,6 +19,7 @@ final class NodaNameSplitterTest extends TestCase {
      * @author Joshua Ramon Enslin <joshua@museum-digital.de>
      * @group  ValidOutput
      * @small
+     * @covers \NodaNameSplitter::givenNameFamilyNameFromString
      *
      * @return void
      */