[JAVA-15774] Update JUnit code

testing-modules/junit-5-basics/src/test/java/com/baeldung/migration/junit5/AnnotationTestExampleUnitTest.java

@@ -9,9 +9,10 @@ import org.junit.jupiter.api.Test;
 
 @Tag("annotations")
 @Tag("junit5")
-public class AnnotationTestExampleUnitTest {
+class AnnotationTestExampleUnitTest {
+
     @Test
-    public void shouldRaiseAnException() throws Exception {
+    void shouldRaiseAnException() {
         Assertions.assertThrows(Exception.class, () -> {
             throw new Exception("This is my expected exception");
         });
@@ -19,7 +20,7 @@ public class AnnotationTestExampleUnitTest {
 
     @Test
     @Disabled
-    public void shouldFailBecauseTimeout() throws InterruptedException {
+    void shouldFailBecauseTimeout() {
         Assertions.assertTimeout(Duration.ofMillis(1), () -> Thread.sleep(10));
     }
 }

testing-modules/junit-5-basics/src/test/java/com/baeldung/migration/junit5/AssertionsExampleUnitTest.java

@@ -8,30 +8,28 @@ import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
 public class AssertionsExampleUnitTest {
+
     @Test
     @Disabled
-    public void shouldFailBecauseTheNumbersAreNotEqual() {
+    void shouldFailBecauseTheNumbersAreNotEqual() {
         Assertions.assertEquals(2, 3, "Numbers are not equal!");
     }
 
     @Test
     @Disabled
-    public void shouldFailBecauseItsNotTrue_overloading() {
+    void shouldFailBecauseItsNotTrue_overloading() {
         Assertions.assertTrue(() -> {
             return false;
         }, () -> "It's not true!");
     }
 
     @Test
-    public void shouldAssertAllTheGroup() {
+    void shouldAssertAllTheGroup() {
         List<Integer> list = Arrays.asList(1, 2, 3);
 
-        Assertions.assertAll("List is not incremental", () -> Assertions.assertEquals(list.get(0)
-            .intValue(), 1), () -> Assertions.assertEquals(
-                list.get(1)
-                    .intValue(),
-                2),
-            () -> Assertions.assertEquals(list.get(2)
-                .intValue(), 3));
+        Assertions.assertAll("List is not incremental",
+          () -> Assertions.assertEquals(list.get(0).intValue(), 1),
+          () -> Assertions.assertEquals(list.get(1).intValue(), 2),
+          () -> Assertions.assertEquals(list.get(2).intValue(), 3));
     }
 }

testing-modules/junit-5-basics/src/test/java/com/baeldung/migration/junit5/BeforeAllAndAfterAllAnnotationsUnitTest.java

@@ -6,27 +6,27 @@ import org.junit.jupiter.api.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-public class BeforeAllAndAfterAllAnnotationsUnitTest {
+class BeforeAllAndAfterAllAnnotationsUnitTest {
 
     private static final Logger LOG = LoggerFactory.getLogger(BeforeAllAndAfterAllAnnotationsUnitTest.class);
-    
+
     @BeforeAll
-    public static void setup() {
+    static void setup() {
         LOG.debug("startup - creating DB connection");
     }
 
     @AfterAll
-    public static void tearDown() {
+    static void tearDown() {
         LOG.debug("closing DB connection");
     }
 
     @Test
-    public void simpleTest() {
+    void simpleTest() {
         LOG.debug("simple test");
     }
 
     @Test
-    public void anotherSimpleTest() {
+    void anotherSimpleTest() {
         LOG.debug("another simple test");
     }
 }

testing-modules/junit-5-basics/src/test/java/com/baeldung/migration/junit5/BeforeEachAndAfterEachAnnotationsUnitTest.java

@@ -1,37 +1,37 @@
 package com.baeldung.migration.junit5;
 
-import static org.junit.Assert.assertEquals;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-public class BeforeEachAndAfterEachAnnotationsUnitTest {
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class BeforeEachAndAfterEachAnnotationsUnitTest {
 
     private static final Logger LOG = LoggerFactory.getLogger(BeforeEachAndAfterEachAnnotationsUnitTest.class);
-    
+
     private List<String> list;
-    
-    @BeforeEach 
-    public void init() {
+
+    @BeforeEach
+    void init() {
         LOG.debug("startup");
         list = new ArrayList<>(Arrays.asList("test1", "test2"));
     }
 
     @AfterEach
-    public void teardown() {
+    void teardown() {
         LOG.debug("teardown");
         list.clear();
     }
 
     @Test
-    public void whenCheckingListSize_ThenSizeEqualsToInit() {
+    void whenCheckingListSize_thenSizeEqualsToInit() {
         LOG.debug("executing test");
         assertEquals(2, list.size());
 
@@ -39,7 +39,7 @@ public class BeforeEachAndAfterEachAnnotationsUnitTest {
     }
 
     @Test
-    public void whenCheckingListSizeAgain_ThenSizeEqualsToInit() {
+    public void whenCheckingListSizeAgain_thenSizeEqualsToInit() {
         LOG.debug("executing another test");
         assertEquals(2, list.size());
 

testing-modules/junit-5-basics/src/test/java/com/baeldung/migration/junit5/RuleExampleUnitTest.java

@@ -8,12 +8,12 @@ import org.slf4j.LoggerFactory;
 import com.baeldung.migration.junit5.extensions.TraceUnitExtension;
 
 @ExtendWith(TraceUnitExtension.class)
-public class RuleExampleUnitTest {
+class RuleExampleUnitTest {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(RuleExampleUnitTest.class);
-    
+
     @Test
-    public void whenTracingTests() {
+    void whenTracingTests() {
        LOGGER.debug("This is my test");
         /*...*/
     }