[BAEL-9635] - Moved Junit vs TestNg junit code examples to junit-5 module from core-java

testing-modules/junit-5/src/main/java/com/baeldung/throwsexception/Calculator.java

@@ -0,0 +1,15 @@
+package com.baeldung.throwsexception;
+
+public class Calculator {
+
+    public double divide(double a, double b) {
+        if (b == 0) {
+            throw new DivideByZeroException("Divider cannot be equal to zero!");
+        }
+        return a/b;
+    }
+
+}
+
+
+

testing-modules/junit-5/src/main/java/com/baeldung/throwsexception/DivideByZeroException.java

@@ -0,0 +1,9 @@
+package com.baeldung.throwsexception;
+
+public class DivideByZeroException extends RuntimeException {
+
+    public DivideByZeroException(String message) {
+        super(message);
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/junit4vstestng/SortedUnitTest.java

@@ -0,0 +1,22 @@
+package com.baeldung.junit4vstestng;
+
+import static org.junit.Assert.assertTrue;
+
+import org.junit.FixMethodOrder;
+import org.junit.Test;
+import org.junit.runners.MethodSorters;
+
+@FixMethodOrder(MethodSorters.NAME_ASCENDING)
+public class SortedUnitTest {
+
+    @Test
+    public void a_givenString_whenChangedtoInt_thenTrue() {
+        assertTrue(Integer.valueOf("10") instanceof Integer);
+    }
+
+    @Test
+    public void b_givenInt_whenChangedtoString_thenTrue() {
+        assertTrue(String.valueOf(10) instanceof String);
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/junit4vstestng/SummationServiceIntegrationTest.java

@@ -0,0 +1,58 @@
+package com.baeldung.junit4vstestng;
+
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Ignore;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class SummationServiceIntegrationTest {
+    private static List<Integer> numbers;
+
+    @BeforeClass
+    public static void initialize() {
+        numbers = new ArrayList<>();
+    }
+
+    @AfterClass
+    public static void tearDown() {
+        numbers = null;
+    }
+
+    @Before
+    public void runBeforeEachTest() {
+        numbers.add(1);
+        numbers.add(2);
+        numbers.add(3);
+    }
+
+    @After
+    public void runAfterEachTest() {
+        numbers.clear();
+    }
+
+    @Test
+    public void givenNumbers_sumEquals_thenCorrect() {
+        int sum = numbers.stream()
+            .reduce(0, Integer::sum);
+        Assert.assertEquals(6, sum);
+    }
+
+    @Ignore
+    @Test
+    public void givenEmptyList_sumEqualsZero_thenCorrect() {
+        int sum = numbers.stream()
+            .reduce(0, Integer::sum);
+        Assert.assertEquals(6, sum);
+    }
+
+    @Test(expected = ArithmeticException.class)
+    public void givenNumber_whenThrowsException_thenCorrect() {
+        int i = 1 / 0;
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/junit5vstestng/SummationServiceIntegrationTest.java

@@ -0,0 +1,53 @@
+package com.baeldung.junit5vstestng;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class SummationServiceIntegrationTest {
+    private static List<Integer> numbers;
+
+    @BeforeAll
+    public static void initialize() {
+        numbers = new ArrayList<>();
+    }
+ 
+    @AfterAll
+    public static void tearDown() {
+        numbers = null;
+    }
+ 
+    @BeforeEach
+    public void runBeforeEachTest() {
+        numbers.add(1);
+        numbers.add(2);
+        numbers.add(3);
+    }
+ 
+    @AfterEach
+    public void runAfterEachTest() {
+        numbers.clear();
+    }
+ 
+    @Test
+    public void givenNumbers_sumEquals_thenCorrect() {
+        int sum = numbers.stream()
+            .reduce(0, Integer::sum);
+        Assert.assertEquals(6, sum);
+    }
+
+    @Ignore
+    @Test
+    public void givenEmptyList_sumEqualsZero_thenCorrect() {
+        int sum = numbers.stream()
+            .reduce(0, Integer::sum);
+        Assert.assertEquals(6, sum);
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/throwsexception/CalculatorUnitTest.java

@@ -0,0 +1,17 @@
+package com.baeldung.throwsexception;
+
+import org.junit.Test;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class CalculatorUnitTest {
+
+    @Test
+    public void whenDividerIsZero_thenDivideByZeroExceptionIsThrown() {
+        Calculator calculator = new Calculator();
+
+        assertThrows(DivideByZeroException.class,
+                () -> calculator.divide(10, 0));
+    }
+
+}