add toArray(int[])

primitiveCollections/src/test/java/org/lucares/collections/IntListTest.java

@@ -285,6 +285,59 @@ public class IntListTest {
 		Assert.assertArrayEquals(actual, new int[0]);
 	}
 
+	@Test
+	public void testToArray() {
+		final IntList list = new IntList();
+		list.addAll(1, 2, 3, 4, 5, 6);
+
+		{
+			final int[] input = new int[1];
+			final int[] actual = list.toArray(input);
+			// input is too short -> new array returned
+			Assert.assertNotSame(input, actual);
+			Assert.assertArrayEquals(list.toArray(), actual);
+		}
+
+		{
+			final int[] input = new int[list.size()];
+			final int[] actual = list.toArray(input);
+			// input fits exactly -> input returned
+			Assert.assertSame(input, actual);
+			Assert.assertArrayEquals(list.toArray(), actual);
+		}
+
+		{
+			final int[] input = new int[list.size() + 1];
+			final int[] expected = { 1, 2, 3, 4, 5, 6, 0 };
+			final int[] actual = list.toArray(input);
+			// input too big -> input returned
+			Assert.assertSame(input, actual);
+			Assert.assertArrayEquals(expected, actual);
+		}
+	}
+
+	@Test
+	public void testToArrayWithEmptyList() {
+		final IntList list = new IntList();
+
+		{
+			final int[] input = new int[0];
+			final int[] actual = list.toArray(input);
+			// input fits exactly -> input returned
+			Assert.assertSame(input, actual);
+			Assert.assertArrayEquals(list.toArray(), actual);
+		}
+
+		{
+			final int[] input = new int[list.size() + 1];
+			final int[] expected = { 0 };
+			final int[] actual = list.toArray(input);
+			// input too big -> input returned
+			Assert.assertSame(input, actual);
+			Assert.assertArrayEquals(expected, actual);
+		}
+	}
+
 	@Test
 	public void testRemove() {
 		final IntList list = new IntList();