From d1bd04d2dce4bbf8b67d0f3f0ab4b0ac62c2c85a Mon Sep 17 00:00:00 2001
From: Grzegorz Piwowarek <gpw@touk.pl>
Date: Wed, 28 Sep 2016 16:22:31 +0200
Subject: [PATCH] Add example

---
 .../baeldung/java9/Java9OptionalsStreamTest.java    | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/core-java-9/src/test/java/com/baeldung/java9/Java9OptionalsStreamTest.java b/core-java-9/src/test/java/com/baeldung/java9/Java9OptionalsStreamTest.java
index 102ceda18f..b0684a94f8 100644
--- a/core-java-9/src/test/java/com/baeldung/java9/Java9OptionalsStreamTest.java
+++ b/core-java-9/src/test/java/com/baeldung/java9/Java9OptionalsStreamTest.java
@@ -42,6 +42,19 @@ public class Java9OptionalsStreamTest {
         assertEquals("bar", filteredList.get(1));
     }
 
+    @Test
+    public void filterOutPresentOptionalsWithFlatMap2() {
+        assertEquals(4, listOfOptionals.size());
+
+        List<String> filteredList = listOfOptionals.stream()
+          .flatMap(o -> o.map(Stream::of).orElseGet(Stream::empty))
+          .collect(Collectors.toList());
+        assertEquals(2, filteredList.size());
+
+        assertEquals("foo", filteredList.get(0));
+        assertEquals("bar", filteredList.get(1));
+    }
+
     @Test
     public void filterOutPresentOptionalsWithJava9() {
         assertEquals(4, listOfOptionals.size());