Add basic framework

tests/AbstractTestCase.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Tests;
+
+use AdventOfCode21\AbstractCommand;
+use PHPUnit\Framework\TestCase;
+
+abstract class AbstractTestCase extends TestCase
+{
+    public AbstractCommand $command;
+
+    protected function setUp(): void
+    {
+        $this->command = $this->setupDay();
+    }
+
+    public function testPart1(): void
+    {
+        $this->assertSame(static::$part1ExampleResult, $this->command->part1ExampleResult());
+        $this->assertSame(static::$part1Result, $this->command->part1Result());
+    }
+
+    public function testPart2(): void
+    {
+        $this->assertSame(static::$part2ExampleResult, $this->command->part2ExampleResult());
+        $this->assertSame(static::$part2Result, $this->command->part2Result());
+    }
+
+    abstract public function setupDay(): AbstractCommand;
+}