From d3c805beceb69477eb969b9ea50989180c070059 Mon Sep 17 00:00:00 2001
From: Javier Guajardo <javier.guajardoj@gmail.com>
Date: Sat, 5 Nov 2022 01:06:33 +0200
Subject: [PATCH] Add function to count list

---
 lists.go            |  7 ++++++-
 tests/lists_test.go | 15 +++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/lists.go b/lists.go
index b848a6d..682a5fd 100644
--- a/lists.go
+++ b/lists.go
@@ -11,7 +11,7 @@ func GetList(options ...string) ([]string, error) {
 	var listName string
 
 	if len(options) == 0 {
-		return nil, fmt.Errorf("not enough arguments")
+		return []string{}, fmt.Errorf("not enough arguments")
 	}
 
 	listName = options[0]
@@ -140,3 +140,8 @@ func ReplaceList(listName string, index int, newElement string) (bool, error) {
 
 	return true, nil
 }
+
+func CountList(listName string) (int, error) {
+	list, err := GetList(listName)
+	return len(list), err
+}
\ No newline at end of file
diff --git a/tests/lists_test.go b/tests/lists_test.go
index ecfdab8..383d551 100644
--- a/tests/lists_test.go
+++ b/tests/lists_test.go
@@ -153,4 +153,19 @@ func TestLists(t *testing.T) {
 			}
 		}
 	})
+
+	t.Run("Test Count List", func(t *testing.T) {
+		var listName string = "countable"
+		var expected int = 3
+		sider.RPush(listName, "1 item")
+		sider.RPush(listName, "2 item")
+		sider.RPush(listName, "3 item")
+		if count, err := sider.CountList(listName); err != nil {
+			t.Errorf("Error CountList function %v", err)
+		} else {
+			if count != expected {
+				t.Errorf("Value count %v != %v", count, expected)
+			}
+		}
+	})
 }