BAEL-899 Guide to @RepeatedTest in Junit 5 (#1815)

* BAEL-88 Testing in Spring Boot

* BAEL-88 Integration tests fixed.

* BAEL-905 Improvement task for spring boot testing

* BAEL-905 Improvement task for spring boot testing

* BAEL-926 Upgrade Junit 5 dependencies to use M4

* BAEL-899 Guide to @RepeatedTest in Junit 5

junit5/src/test/java/com/baeldung/RepeatedTestExample.java

@@ -0,0 +1,52 @@
+package com.baeldung;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.RepeatedTest;
+import org.junit.jupiter.api.RepetitionInfo;
+import org.junit.jupiter.api.TestInfo;
+
+public class RepeatedTestExample {
+
+    @BeforeEach
+    void beforeEachTest() {
+        System.out.println("Before Each Test");
+    }
+    
+    @AfterEach
+    void afterEachTest() {
+        System.out.println("After Each Test");
+        System.out.println("=====================");
+    }
+    
+    @RepeatedTest(3)
+    void repeatedTest(TestInfo testInfo) {
+        System.out.println("Executing repeated test");
+        assertEquals(2, Math.addExact(1, 1), "1 + 1 should equal 2");
+    }
+    
+    @RepeatedTest(value = 3, name = RepeatedTest.LONG_DISPLAY_NAME)
+    void repeatedTestWithLongName() {
+        System.out.println("Executing repeated test with long name");
+        assertEquals(2, Math.addExact(1, 1), "1 + 1 should equal 2");
+    }
+    
+    @RepeatedTest(value = 3, name = RepeatedTest.SHORT_DISPLAY_NAME)
+    void repeatedTestWithShortName() {
+        System.out.println("Executing repeated test with long name");
+        assertEquals(2, Math.addExact(1, 1), "1 + 1 should equal 2");
+    }
+    
+    @RepeatedTest(value = 3, name = "Custom name {currentRepetition}/{totalRepetitions}")
+    void repeatedTestWithCustomDisplayName() {
+        assertEquals(2, Math.addExact(1, 1), "1 + 1 should equal 2");
+    }
+    
+    @RepeatedTest(3)
+    void repeatedTestWithRepetitionInfo(RepetitionInfo repetitionInfo) {
+        System.out.println("Repetition #" + repetitionInfo.getCurrentRepetition());
+        assertEquals(3, repetitionInfo.getTotalRepetitions());
+    }
+}