feat: model battlefield terrain and movement costs

2026-07-04 15:08:40 -05:00
parent 7b82adbd71
commit 189be5bc64
4 changed files with 203 additions and 0 deletions
@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+namespace BattleForge\Tests\Unit\Domain;
+
+use BattleForge\Domain\Battlefield;
+use BattleForge\Domain\Position;
+use BattleForge\Domain\Terrain;
+use InvalidArgumentException;
+use PHPUnit\Framework\TestCase;
+
+final class BattlefieldTest extends TestCase
+{
+    public function testItRejectsDimensionsOutsideTheSupportedRange(): void
+    {
+        $this->expectException(InvalidArgumentException::class);
+
+        new Battlefield(7, 16);
+    }
+
+    public function testItFindsReachableTilesUsingTerrainCostsAndObstacles(): void
+    {
+        $battlefield = new Battlefield(8, 8, [
+            '1:0' => Terrain::Forest,
+            '0:1' => Terrain::Rough,
+            '2:0' => Terrain::Water,
+            '1:1' => Terrain::Blocking,
+        ]);
+
+        $reachable = $battlefield->reachable(
+            new Position(0, 0),
+            2,
+            [new Position(0, 2)],
+        );
+
+        self::assertSame(0, $reachable['0:0']);
+        self::assertSame(2, $reachable['1:0']);
+        self::assertSame(2, $reachable['0:1']);
+        self::assertArrayNotHasKey('2:0', $reachable);
+        self::assertArrayNotHasKey('1:1', $reachable);
+        self::assertArrayNotHasKey('0:2', $reachable);
+    }
+}