Add day 7

tests/Day7Test.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Tests;
+
+use AdventOfCode21\Day7;
+
+/**
+ * @internal
+ */
+class Day7Test extends AbstractTestCase
+{
+    public static int $part1ExampleResult = 37;
+    public static int $part1Result = 344297;
+
+    public static int $part2ExampleResult = 168;
+    public static int $part2Result = 97164301;
+
+    public function setupDay(): Day7
+    {
+        return new class() extends Day7 {
+            use ReturnTestableResults;
+        };
+    }
+}