Refactor tests

Author: damianmalczewski

problem4j-core/src/test/java/io/github/problem4j/core/AbstractProblemTest.java

@@ -246,6 +246,7 @@ void givenTwoDifferentExtensions_shouldHaveDifferentHashCodes() {
   }
 
   private static class DummyObject {
+
     private final String value;
 
     DummyObject(String value) {

…em4j/core/AbstractProblemMapperTest.java …ub/problem4j/core/ProblemMapperTest.javaproblem4j-core/src/test/java/io/github/problem4j/core/AbstractProblemMapperTest.java renamed to problem4j-core/src/test/java/io/github/problem4j/core/ProblemMapperTest.java problem4j-core/src/test/java/io/github/problem4j/core/AbstractProblemMapperTest.java renamed to problem4j-core/src/test/java/io/github/problem4j/core/ProblemMapperTest.java

@@ -21,13 +21,13 @@
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.CsvSource;
 
-class AbstractProblemMapperTest {
+class ProblemMapperTest {
 
   private ProblemMapper processor;
 
   @BeforeEach
   void beforeEach() {
-    processor = new AbstractProblemMapper() {};
+    processor = ProblemMapper.create();
   }
 
   @Test