Bael 2018 (#4774)

* BAEL-2018

* Update Animal.java

* rename

* tests added

* generic type shorten

core-java-8/src/test/java/com/baeldung/convertlisttomap/ConvertListToMapServiceUnitTest.java

@@ -29,6 +29,7 @@ public class ConvertListToMapServiceUnitTest {
         list.add(cow);
         Animal goat = new Animal(5, "Goat");
         list.add(goat);
+
     }
 
     @Test
@@ -56,18 +57,11 @@ public class ConvertListToMapServiceUnitTest {
     }
 
     @Test
-    public void givenAList_whenConvertWithApacheCommons1_thenReturnMapWithTheSameElements() {
+    public void givenAList_whenConvertWithApacheCommons_thenReturnMapWithTheSameElements() {
 
-        Map<Integer, Animal> map = convertListService.convertListWithApacheCommons1(list);
+        Map<Integer, Animal> map = convertListService.convertListWithApacheCommons(list);
 
         assertThat(map.values(), containsInAnyOrder(list.toArray()));
     }
 
-    @Test
-    public void givenAList_whenConvertWithApacheCommons2_thenReturnMapWithTheSameElements() {
-
-        Map<Integer, Animal> map = convertListService.convertListWithApacheCommons2(list);
-
-        assertThat(map.values(), containsInAnyOrder(list.toArray()));
-    }
 }

core-java-8/src/test/java/com/baeldung/convertlisttomap/ConvertListWithDiplicatedIdToMapServiceUnitTest.java

@@ -0,0 +1,68 @@
+package com.baeldung.convertlisttomap;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.hasItem;
+import static org.hamcrest.Matchers.hasSize;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+import org.junit.Before;
+import org.junit.Test;
+
+public class ConvertListWithDiplicatedIdToMapServiceUnitTest {
+    List<Animal> duplicatedIdList;
+
+    private ConvertListToMapService convertListService = new ConvertListToMapService();
+
+    @Before
+    public void init() {
+
+        this.duplicatedIdList = new ArrayList<>();
+
+        Animal cat = new Animal(1, "Cat");
+        duplicatedIdList.add(cat);
+        Animal dog = new Animal(2, "Dog");
+        duplicatedIdList.add(dog);
+        Animal pig = new Animal(3, "Pig");
+        duplicatedIdList.add(pig);
+        Animal cow = new Animal(4, "Cow");
+        duplicatedIdList.add(cow);
+        Animal goat = new Animal(4, "Goat");
+        duplicatedIdList.add(goat);
+
+    }
+
+    @Test
+    public void givenADupIdList_whenConvertBeforeJava8_thenReturnMapWithRewrittenElement() {
+
+        Map<Integer, Animal> map = convertListService.convertListBeforeJava8(duplicatedIdList);
+
+        assertThat(map.values(), hasSize(4));
+        assertThat(map.values(), hasItem(duplicatedIdList.get(4)));
+    }
+
+    @Test
+    public void givenADupIdList_whenConvertWithApacheCommons_thenReturnMapWithRewrittenElement() {
+
+        Map<Integer, Animal> map = convertListService.convertListWithApacheCommons(duplicatedIdList);
+
+        assertThat(map.values(), hasSize(4));
+        assertThat(map.values(), hasItem(duplicatedIdList.get(4)));
+    }
+
+    @Test(expected = IllegalStateException.class)
+    public void givenADupIdList_whenConvertAfterJava8_thenException() {
+
+        convertListService.convertListAfterJava8(duplicatedIdList);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void givenADupIdList_whenConvertWithGuava_thenException() {
+
+        convertListService.convertListWithGuava(duplicatedIdList);
+
+    }
+
+}