codes.txt

tests/Unit/CouponCodePoolTest.php

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+<?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());
+    }
+}

tests/Unit/CouponServiceTest.php

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+<?php
+
+namespace Tests\Unit;
+
+use App\Exceptions\CouponPoolExhaustedException;
+use App\Models\Coupon;
+use App\Services\CouponCodePool;
+use App\Services\CouponService;
+use Illuminate\Foundation\Testing\LazilyRefreshDatabase;
+use Mockery;
+use Mockery\MockInterface;
+use Tests\TestCase;
+
+class CouponServiceTest extends TestCase
+{
+    use LazilyRefreshDatabase;
+
+    public function test_find_or_create_assigns_code_from_pool(): void
+    {
+        $this->mock(CouponCodePool::class, function (MockInterface $mock): void {
+            $mock->shouldReceive('pickRandom')->once()->andReturn('1_AAAA');
+        });
+
+        $coupon = app(CouponService::class)->findOrCreateForPhone('61929248');
+
+        $this->assertSame('61929248', $coupon->phone);
+        $this->assertSame('1_AAAA', $coupon->code);
+        $this->assertDatabaseHas(Coupon::class, [
+            'phone' => '61929248',
+            'code' => '1_AAAA',
+        ]);
+    }
+
+    public function test_find_or_create_returns_existing_coupon_without_picking(): void
+    {
+        $existing = Coupon::factory()->create(['phone' => '61929248', 'code' => '2_BBBB']);
+
+        $this->mock(CouponCodePool::class, function (MockInterface $mock): void {
+            $mock->shouldNotReceive('pickRandom');
+        });
+
+        $coupon = app(CouponService::class)->findOrCreateForPhone('61929248');
+
+        $this->assertTrue($existing->is($coupon));
+    }
+
+    public function test_find_or_create_throws_when_pool_exhausted(): void
+    {
+        $this->mock(CouponCodePool::class, function (MockInterface $mock): void {
+            $mock->shouldReceive('pickRandom')->andReturn(null);
+        });
+
+        $this->expectException(CouponPoolExhaustedException::class);
+
+        app(CouponService::class)->findOrCreateForPhone('61929248');
+    }
+
+    protected function tearDown(): void
+    {
+        Mockery::close();
+
+        parent::tearDown();
+    }
+}