codes.txt

tests/Unit/CouponCodePoolTest.php

@@ -0,0 +1,73 @@
+<?php
+
+namespace Tests\Unit;
+
+use App\Models\Coupon;
+use App\Services\CouponCodePool;
+use Illuminate\Foundation\Testing\LazilyRefreshDatabase;
+use Tests\TestCase;
+
+class CouponCodePoolTest extends TestCase
+{
+    use LazilyRefreshDatabase;
+
+    private string $codesPath;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->codesPath = tempnam(sys_get_temp_dir(), 'codes_');
+        file_put_contents($this->codesPath, "1_AAAA\n2_BBBB\n3_CCCC\n");
+    }
+
+    protected function tearDown(): void
+    {
+        if (is_file($this->codesPath)) {
+            unlink($this->codesPath);
+        }
+
+        parent::tearDown();
+    }
+
+    public function test_all_codes_loads_from_file(): void
+    {
+        $pool = new CouponCodePool($this->codesPath);
+
+        $this->assertSame(['1_AAAA', '2_BBBB', '3_CCCC'], $pool->allCodes());
+    }
+
+    public function test_available_codes_excludes_used_coupons(): void
+    {
+        Coupon::factory()->create(['code' => '1_AAAA', 'phone' => '61111111']);
+
+        $pool = new CouponCodePool($this->codesPath);
+
+        $this->assertEqualsCanonicalizing(['2_BBBB', '3_CCCC'], $pool->availableCodes());
+    }
+
+    public function test_pick_random_returns_only_unused_code(): void
+    {
+        Coupon::factory()->create(['code' => '2_BBBB', 'phone' => '61111111']);
+
+        $pool = new CouponCodePool($this->codesPath);
+
+        for ($i = 0; $i < 20; $i++) {
+            $picked = $pool->pickRandom();
+            $this->assertContains($picked, ['1_AAAA', '3_CCCC']);
+        }
+    }
+
+    public function test_has_available_is_false_when_all_codes_used(): void
+    {
+        Coupon::factory()->create(['code' => '1_AAAA', 'phone' => '61111111']);
+        Coupon::factory()->create(['code' => '2_BBBB', 'phone' => '62222222']);
+        Coupon::factory()->create(['code' => '3_CCCC', 'phone' => '63333333']);
+
+        $pool = new CouponCodePool($this->codesPath);
+
+        $this->assertFalse($pool->hasAvailable());
+        $this->assertNull($pool->pickRandom());
+        $this->assertSame([], $pool->availableCodes());
+    }
+}