From 68ab31308f1bc8061575926d57f98b986e6b9ca0 Mon Sep 17 00:00:00 2001
From: Hanh Tran <tranduchanh.ms@gmail.com>
Date: Mon, 27 Aug 2018 17:55:10 +0900
Subject: [PATCH 1/2] Add LinkedList test

---
 src/data-structures/linked-list/__test__/LinkedList.test.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/data-structures/linked-list/__test__/LinkedList.test.js b/src/data-structures/linked-list/__test__/LinkedList.test.js
index 376a2e019b..795bb24793 100644
--- a/src/data-structures/linked-list/__test__/LinkedList.test.js
+++ b/src/data-structures/linked-list/__test__/LinkedList.test.js
@@ -16,6 +16,7 @@ describe('LinkedList', () => {
     linkedList.append(2);
 
     expect(linkedList.toString()).toBe('1,2');
+    expect(linkedList.tail.next).toBeNull();
   });
 
   it('should prepend node to linked list', () => {

From 69505f1d4cf960ed6b4de0b992c8a2115063d533 Mon Sep 17 00:00:00 2001
From: "Hanh D. TRAN" <tranduchanh.ms@gmail.com>
Date: Mon, 27 Aug 2018 23:37:21 +0900
Subject: [PATCH 2/2] Add pseudocode for LinkedList prepend

---
 src/data-structures/linked-list/README.md | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/data-structures/linked-list/README.md b/src/data-structures/linked-list/README.md
index b0e5eaf934..c05c24af4e 100644
--- a/src/data-structures/linked-list/README.md
+++ b/src/data-structures/linked-list/README.md
@@ -37,7 +37,20 @@ Add(value)
   end if
 end Add
 ```
-    
+
+```text
+Prepend(value)
+ Pre: value is the value to add to the list
+ Post: value has been placed at the head of the list
+ n ← node(value)
+ n.next ← head
+ head ← n
+ if tail = ø
+   tail ← n
+ end
+end Prepend
+```
+
 ### Search
 
 ```text