conversion simple testing work

core-java/src/test/java/org/baeldung/java/collections/JavaCollectionConversionUnitTest.java

@@ -2,17 +2,24 @@ package org.baeldung.java.collections;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 
 import org.apache.commons.collections4.CollectionUtils;
+import org.apache.commons.lang3.ArrayUtils;
 import org.junit.Test;
 
 import com.google.common.collect.Lists;
+import com.google.common.collect.Sets;
 import com.google.common.primitives.Ints;
 
 @SuppressWarnings("unused")
 public class JavaCollectionConversionUnitTest {
 
+    // List -> array; array -> List
+
     @Test
     public final void givenUsingCoreJava_whenArrayConvertedToList_thenCorrect() {
         final Integer[] sourceArray = { 0, 1, 2, 3, 4, 5 };
@@ -20,7 +27,7 @@ public class JavaCollectionConversionUnitTest {
     }
 
     @Test
-    public void givenUsingCoreJava_whenListConvertedToArray_thenCorrect() {
+    public final void givenUsingCoreJava_whenListConvertedToArray_thenCorrect() {
         final List<Integer> sourceList = Lists.<Integer> newArrayList(0, 1, 2, 3, 4, 5);
         final Integer[] targetArray = sourceList.toArray(new Integer[sourceList.size()]);
     }
@@ -32,16 +39,69 @@ public class JavaCollectionConversionUnitTest {
     }
 
     @Test
-    public void givenUsingGuava_whenLIistConvertedToArray_thenCorrect() {
+    public final void givenUsingGuava_whenListConvertedToArray_thenCorrect() {
         final List<Integer> sourceList = Lists.newArrayList(0, 1, 2, 3, 4, 5);
         final int[] targetArray = Ints.toArray(sourceList);
     }
 
     @Test
-    public void givenUsingCommonsCollections_whenArrayConvertedToList_thenCorrect() {
+    public final void givenUsingCommonsCollections_whenArrayConvertedToList_thenCorrect() {
         final Integer[] sourceArray = { 0, 1, 2, 3, 4, 5 };
         final List<Integer> targetList = new ArrayList<>(6);
         CollectionUtils.addAll(targetList, sourceArray);
     }
 
+    // Set -> array; array -> Set
+
+    @Test
+    public final void givenUsingCoreJavaV1_whenArrayConvertedToSet_thenCorrect() {
+        final Integer[] sourceArray = { 0, 1, 2, 3, 4, 5 };
+        final Set<Integer> targetSet = new HashSet<Integer>(Arrays.asList(sourceArray));
+    }
+
+    @Test
+    public final void givenUsingCoreJavaV2_whenArrayConvertedToSet_thenCorrect() {
+        final Integer[] sourceArray = { 0, 1, 2, 3, 4, 5 };
+        final Set<Integer> targetSet = new HashSet<Integer>();
+        Collections.addAll(targetSet, sourceArray);
+    }
+
+    @Test
+    public final void givenUsingCoreJava_whenSetConvertedToArray_thenCorrect() {
+        final Set<Integer> sourceSet = Sets.newHashSet(0, 1, 2, 3, 4, 5);
+        final Integer[] targetArray = sourceSet.toArray(new Integer[sourceSet.size()]);
+    }
+
+    @Test
+    public final void givenUsingGuava_whenArrayConvertedToSet_thenCorrect() {
+        final Integer[] sourceArray = { 0, 1, 2, 3, 4, 5 };
+        final Set<Integer> targetSet = Sets.newHashSet(sourceArray);
+    }
+
+    @Test
+    public final void givenUsingGuava_whenSetConvertedToArray_thenCorrect() {
+        final Set<Integer> sourceSet = Sets.newHashSet(0, 1, 2, 3, 4, 5);
+        final int[] targetArray = Ints.toArray(sourceSet);
+    }
+
+    @Test
+    public final void givenUsingCommonsCollections_whenArrayConvertedToSet_thenCorrect() {
+        final Integer[] sourceArray = { 0, 1, 2, 3, 4, 5 };
+        final Set<Integer> targetSet = new HashSet<>(6);
+        CollectionUtils.addAll(targetSet, sourceArray);
+    }
+
+    @Test
+    public final void givenUsingCommonsCollections_whenSetConvertedToArray_thenCorrect() {
+        final Set<Integer> sourceSet = Sets.newHashSet(0, 1, 2, 3, 4, 5);
+        final Integer[] targetArray = sourceSet.toArray(new Integer[sourceSet.size()]);
+    }
+
+    @Test
+    public final void givenUsingCommonsCollections_whenSetConvertedToArrayOfPrimitives_thenCorrect() {
+        final Set<Integer> sourceSet = Sets.newHashSet(0, 1, 2, 3, 4, 5);
+        final Integer[] targetArray = sourceSet.toArray(new Integer[sourceSet.size()]);
+        final int[] primitiveTargetArray = ArrayUtils.toPrimitive(targetArray);
+    }
+
 }