BAEL-6978: Adding the information about the bug (#14804)

core-java-modules/core-java-collections-maps-5/src/main/java/com/baeldung/map/identity/IdentityHashMapDemonstrator.java

@@ -53,7 +53,7 @@ public class IdentityHashMapDemonstrator {
         }
     }
 
-    private static class Book {
+    static class Book {
         String title;
         int year;
 

core-java-modules/core-java-collections-maps-5/src/test/java/com/baeldung/map/identity/IdentityHashMapDemonstratorUnitTest.java

@@ -1,8 +1,11 @@
 package com.baeldung.map.identity;
 
+import com.baeldung.map.identity.IdentityHashMapDemonstrator.Book;
 import org.junit.jupiter.api.Test;
 
 import java.util.IdentityHashMap;
+import org.junit.jupiter.api.condition.EnabledForJreRange;
+import org.junit.jupiter.api.condition.JRE;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
@@ -18,4 +21,44 @@ public class IdentityHashMapDemonstratorUnitTest {
         assertEquals("Fantasy", identityHashMap.get("genre"));
         assertEquals("Drama", identityHashMap.get(newGenreKey));
     }
+
+    @Test
+    @EnabledForJreRange(max = JRE.JAVA_19)
+    public void removeEntryComparingValueByEquality() {
+        Book book = new Book("A Passage to India", 1924);
+        IdentityHashMap<Book, String> identityHashMap = new IdentityHashMap<>(10);
+        identityHashMap.put(book, "A great work of fiction");
+        identityHashMap.remove(book, new String("A great work of fiction"));
+        assertEquals(null, identityHashMap.get(book));
+    }
+
+    @Test
+    @EnabledForJreRange(max = JRE.JAVA_19)
+    public void replaceEntryComparingValueByEquality() {
+        Book book = new Book("A Passage to India", 1924);
+        IdentityHashMap<Book, String> identityHashMap = new IdentityHashMap<>(10);
+        identityHashMap.put(book, "A great work of fiction");
+        identityHashMap.replace(book, new String("A great work of fiction"), "One of the greatest books");
+        assertEquals("One of the greatest books", identityHashMap.get(book));
+    }
+
+    @Test
+    @EnabledForJreRange(min = JRE.JAVA_20)
+    public void dontRemoveEntryComparingValueByEquality() {
+        Book book = new Book("A Passage to India", 1924);
+        IdentityHashMap<Book, String> identityHashMap = new IdentityHashMap<>(10);
+        identityHashMap.put(book, "A great work of fiction");
+        identityHashMap.remove(book, new String("A great work of fiction"));
+        assertEquals("A great work of fiction", identityHashMap.get(book));
+    }
+
+    @Test
+    @EnabledForJreRange(min = JRE.JAVA_20)
+    public void dontReplaceEntryComparingValueByEquality() {
+        Book book = new Book("A Passage to India", 1924);
+        IdentityHashMap<Book, String> identityHashMap = new IdentityHashMap<>(10);
+        identityHashMap.put(book, "A great work of fiction");
+        identityHashMap.replace(book, new String("A great work of fiction"), "One of the greatest books");
+        assertEquals("A great work of fiction", identityHashMap.get(book));
+    }
 }