BAEL-2018 Moved to core-java-collections (#4796)

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

@@ -0,0 +1,68 @@
+package com.baeldung.convertlisttomap;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.containsInAnyOrder;
+
+public class ConvertListToMapServiceUnitTest {
+    List<Animal> list;
+
+    private ConvertListToMapService convertListService;
+
+    @Before
+    public void init() {
+        this.convertListService = new ConvertListToMapService();
+        this.list = new ArrayList<>();
+
+        Animal cat = new Animal(1, "Cat");
+        list.add(cat);
+        Animal dog = new Animal(2, "Dog");
+        list.add(dog);
+        Animal pig = new Animal(3, "Pig");
+        list.add(pig);
+        Animal cow = new Animal(4, "Cow");
+        list.add(cow);
+        Animal goat = new Animal(5, "Goat");
+        list.add(goat);
+
+    }
+
+    @Test
+    public void givenAList_whenConvertBeforeJava8_thenReturnMapWithTheSameElements() {
+
+        Map<Integer, Animal> map = convertListService.convertListBeforeJava8(list);
+
+        assertThat(map.values(), containsInAnyOrder(list.toArray()));
+    }
+
+    @Test
+    public void givenAList_whenConvertAfterJava8_thenReturnMapWithTheSameElements() {
+
+        Map<Integer, Animal> map = convertListService.convertListAfterJava8(list);
+
+        assertThat(map.values(), containsInAnyOrder(list.toArray()));
+    }
+
+    @Test
+    public void givenAList_whenConvertWithGuava_thenReturnMapWithTheSameElements() {
+
+        Map<Integer, Animal> map = convertListService.convertListWithGuava(list);
+
+        assertThat(map.values(), containsInAnyOrder(list.toArray()));
+    }
+
+    @Test
+    public void givenAList_whenConvertWithApacheCommons_thenReturnMapWithTheSameElements() {
+
+        Map<Integer, Animal> map = convertListService.convertListWithApacheCommons(list);
+
+        assertThat(map.values(), containsInAnyOrder(list.toArray()));
+    }
+
+}

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

@@ -0,0 +1,68 @@
+package com.baeldung.convertlisttomap;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.hasItem;
+import static org.hamcrest.Matchers.hasSize;
+
+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);
+
+    }
+
+}