Add day 1

tests/Day1Test.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Tests;
+
+use AdventOfCode21\Day1;
+
+/**
+ * @internal
+ */
+class Day1Test extends AbstractTestCase
+{
+    public static int $part1ExampleResult = 7;
+    public static int $part1Result = 1688;
+
+    public static int $part2ExampleResult = 5;
+    public static int $part2Result = 1728;
+
+    public function setupDay(): Day1
+    {
+        return new class() extends Day1 {
+            use ReturnTestableResults;
+        };
+    }
+}