Bael 7891 (#16494)

* BAEL-7891: Test for equality vs identity

* BAEL-7891: Fixed formatting

* BAEL-7891: Fixed a type and a bug

testing-modules/junit-5-basics-2/src/test/java/com/baeldung/junit/equalsvssame/EqualsVsSameUnitTest.java

@@ -0,0 +1,57 @@
+package com.baeldung.junit.equalsvssame;
+
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertNotSame;
+import static org.junit.jupiter.api.Assertions.assertSame;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+class EqualsVsSameUnitTest {
+
+    @ParameterizedTest
+    @ValueSource(strings = {"Hello", "World"})
+    void givenAString_WhenCompare_ThenItEqualsAndSame(String string) {
+        assertEquals(string, string);
+        assertSame(string, string);
+    }
+
+    public boolean equals(Object obj) {
+        return (this == obj);
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {"Hello", "World"})
+    void givenAStrings_WhenCompareNewStrings_ThenItEqualsButNotSame(String string) {
+        assertEquals(new String(string), new String(string));
+        assertNotSame(new String(string), new String(string));
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {"Hello", "World"})
+    void givenAString_WhenCompareInJava_ThenItEqualsAndSame(String string) {
+        assertTrue(string.equals(string));
+        assertTrue(string == string);
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {"Hello", "World"})
+    void givenAStrings_WhenCompareNewStringsInJava_ThenItEqualsButNotSame(String string) {
+        assertTrue(new String(string).equals(new String(string)));
+        assertFalse(new String(string) == new String(string));
+    }
+
+    @Test
+    void givePeople_WhenCompareWithoutOverridingEquals_TheyNotEqual() {
+        Person firstPerson = new Person("John", "Doe");
+        Person secondPerson = new Person("John", "Doe");
+        assertNotEquals(firstPerson, secondPerson);
+    }
+
+
+}

testing-modules/junit-5-basics-2/src/test/java/com/baeldung/junit/equalsvssame/Person.java

@@ -0,0 +1,21 @@
+package com.baeldung.junit.equalsvssame;
+
+public class Person {
+
+    private final String firstName;
+    private final String lastName;
+
+    public Person(String firstName, String lastName) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+}
+