F ArrayUtils.combine for single argument that is not an array yet plus array of same type

Author: actions-user

approvaltests-util-tests/src/test/java/com/spun/util/ArrayUtilsTest.java

@@ -38,6 +38,13 @@ public void testCombine()
     assertEquals("[1, 2, 3, 5, 6, 7]", ArrayUtils.combine(list1, list2).toString());
   }
   @Test
+  public void testCombineArrays()
+  {
+    Integer[] ints = new Integer[]{5, 6, 7};
+    assertEquals("[1, 5, 6, 7]", Arrays.toString(ArrayUtils.combine(1, ints)));
+    assertEquals("[1]", Arrays.toString(ArrayUtils.combine(1)));
+  }
+  @Test
   void testToArray()
   {
     // begin-snippet: toArray

approvaltests-util/src/main/java/com/spun/util/ArrayUtils.java

@@ -211,6 +211,12 @@ else if (isEmpty(b))
       return newArray;
     }
   }
+  public static <T> T[] combine(T a, T... b)
+  {
+    final T[] toArray = (T[]) Array.newInstance(a.getClass(), 1);
+    toArray[0] = a;
+    return combine(toArray, b);
+  }
   public static <T> boolean contains(T[] values, T value)
   {
     for (int i = 0; i < values.length; i++)
@@ -278,6 +284,7 @@ public static <T> T[] toArray(List<T> list, Class<T> type)
   {
     return Queryable.as(list, type).asArray();
   }
+
   public static <KEY, VALUES, SPECIFIC_VALUE extends VALUES> SPECIFIC_VALUE getOrElse(Map<KEY, VALUES> fields,
       KEY key, Function0<SPECIFIC_VALUE> defaultIfNotFound)
   {
@@ -290,6 +297,7 @@ public static <KEY, VALUES, SPECIFIC_VALUE extends VALUES> SPECIFIC_VALUE getOrE
       return defaultIfNotFound.call();
     }
   }
+
   public static class IterableWrapper<T> implements Iterable<T>
   {
     private final Iterator<T> iterator;