From 6f7561213e392083b00b4bfb27f77f46179d2fcd Mon Sep 17 00:00:00 2001
From: Kharec <sandro@cazzaniga.fr>
Date: Tue, 2 Dec 2025 21:52:56 +0100
Subject: [PATCH] test: add unit test for part one

---
 internal/2015/DayNine/code_test.go | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 internal/2015/DayNine/code_test.go

diff --git a/internal/2015/DayNine/code_test.go b/internal/2015/DayNine/code_test.go
new file mode 100644
index 0000000..e03af19
--- /dev/null
+++ b/internal/2015/DayNine/code_test.go
@@ -0,0 +1,17 @@
+package daynine
+
+import "testing"
+
+var testInput = []string{
+	"London to Dublin = 464",
+	"London to Belfast = 518",
+	"Dublin to Belfast = 141",
+}
+
+func TestPartOne(t *testing.T) {
+	expected := 605
+	got := PartOne(testInput)
+	if got != expected {
+		t.Errorf("PartOne() = %d, want %d", got, expected)
+	}
+}