Removed visibility modifier code smells

src/test/java/de/rwu/easydrop/api/AmazonProductDataSourceTest.java

@@ -22,7 +22,7 @@ import org.mockito.MockitoAnnotations;
 import de.rwu.easydrop.api.client.AmazonProductDataSource;
 import de.rwu.easydrop.api.dto.ProductDTO;
 
-public class AmazonProductDataSourceTest {
+class AmazonProductDataSourceTest {
 
     private AmazonProductDataSource demoDataSource;
 
@@ -32,7 +32,7 @@ public class AmazonProductDataSourceTest {
     private static String demoProductId = "whateverId";
 
     @BeforeEach
-    public void setup() {
+    void setup() {
         demoDataSource = new AmazonProductDataSource(
                 demoApiUrl,
                 demoApiKey);
@@ -40,7 +40,7 @@ public class AmazonProductDataSourceTest {
     }
 
     @Test
-    public void testConstructor() {
+    void testConstructor() {
         // Assert
         try {
             Field baseUrlField = AmazonProductDataSource.class.getDeclaredField("baseUrl");
@@ -58,7 +58,7 @@ public class AmazonProductDataSourceTest {
     }
 
     @Test
-    public void testCreateApiUrl() throws MalformedURLException {
+    void testCreateApiUrl() throws MalformedURLException {
         // Test case 1
         String productId1 = "12345";
         URL expectedUrl1 = new URL(
@@ -76,7 +76,7 @@ public class AmazonProductDataSourceTest {
     }
 
     @Test
-    public void testBuildProductDTO_completeData() {
+    void testBuildProductDTO_completeData() {
         // Set up the test environment
         String json = "{\"featuredOffer\": {\"availability\": \"available\"," +
                 "\"price\": {\"value\": {\"amount\": 10.0}}," +
@@ -96,7 +96,7 @@ public class AmazonProductDataSourceTest {
     }
 
     @Test
-    public void testBuildProductDTO_incompleteData() {
+    void testBuildProductDTO_incompleteData() {
         // Set up the test environment
         String json = "{\"otherOffer\": {\"availability\": \"available\"," +
                 "\"price\": {\"value\": {\"amount\": 10.0}}," +
@@ -116,7 +116,7 @@ public class AmazonProductDataSourceTest {
     }
 
     @Test
-    public void testGetProductDTOById_successfulRequest() throws IOException {
+    void testGetProductDTOById_successfulRequest() throws IOException {
         // Set up the test environment
         String mockResponse = "{\"featuredOffer\": {\"availability\": \"available\"," +
                 "\"price\": {\"value\": {\"amount\": 10.0}}," +
@@ -146,7 +146,7 @@ public class AmazonProductDataSourceTest {
     }
 
     @Test
-    public void testGetProductDTOById_failedRequest() throws IOException {
+    void testGetProductDTOById_failedRequest() throws IOException {
         // Set up the test environment
 
         AmazonProductDataSource dataSource = mock(AmazonProductDataSource.class);
@@ -167,7 +167,7 @@ public class AmazonProductDataSourceTest {
     }
 
     @Test
-    public void testGetProductDTOById_ioException() throws IOException {
+    void testGetProductDTOById_ioException() throws IOException {
         // Set up the test environment
         AmazonProductDataSource dataSource = mock(AmazonProductDataSource.class);
         URL mockURL = mock(URL.class);

src/test/java/de/rwu/easydrop/util/ConfigImplTest.java

@@ -11,7 +11,7 @@ import javax.naming.ConfigurationException;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class ConfigImplTest {
+class ConfigImplTest {
     private Config config;
     private final static String TESTDATA_PATH = "testResources/testdata.properties";
     private final static String TESTDATA_KEY = "API_KEY";

src/test/java/de/rwu/easydrop/util/FormattingUtilTest.java

@@ -10,10 +10,10 @@ import java.lang.reflect.Modifier;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
-public class FormattingUtilTest {
+class FormattingUtilTest {
 
     @Test
-    public void testConstructorIsPrivate()
+    void testConstructorIsPrivate()
             throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
         // Check for private constructor
         Constructor<FormattingUtil> constructor = FormattingUtil.class.getDeclaredConstructor();
@@ -27,7 +27,7 @@ public class FormattingUtilTest {
     }
 
     @Test
-    public void testFormatEuro_positiveAmount() {
+    void testFormatEuro_positiveAmount() {
         double amount = 1234.56;
         String expectedFormattedAmount = "1.234,56 €";
 
@@ -37,7 +37,7 @@ public class FormattingUtilTest {
     }
 
     @Test
-    public void testFormatEuro_zeroAmount() {
+    void testFormatEuro_zeroAmount() {
         double amount = 0.0;
         String expectedFormattedAmount = "0,00 €";
 
@@ -47,7 +47,7 @@ public class FormattingUtilTest {
     }
 
     @Test
-    public void testFormatEuro_negativeAmount() {
+    void testFormatEuro_negativeAmount() {
         double amount = -789.12;
         String expectedFormattedAmount = "-789,12 €";