Add unit. Atomic rollback

tests/Units/Service/AtomicServiceTest.php

@@ -66,4 +66,60 @@ public function testBlockIter3(): void
 
         self::assertSame($iterations * 2000, $user->balanceInt);
     }
+
+    /**
+     * Tests the rollback functionality of the AtomicService.
+     *
+     * This test creates a new Buyer and deposits 1000 units into their wallet. Then, it attempts to
+     * withdraw 3000 units from the wallet within an atomic block. Since there are not enough funds,
+     * an exception is thrown. The test then checks that the balance of the wallet has not changed.
+     */
+    public function testRollback(): void
+    {
+        // Create a new instance of the AtomicService
+        $atomic = app(AtomicServiceInterface::class);
+
+        // Create a new Buyer and deposit 1000 units into their wallet
+        /** @var Buyer $user */
+        $user = BuyerFactory::new()->create();
+        $user->deposit(1000);
+
+        // Check that the balance of the wallet is 1000 units
+        $this->assertSame(1000, $user->balanceInt);
+
+        try {
+            // Start an atomic block and attempt to withdraw 3000 units from the wallet
+            $atomic->block($user, function () use ($user) {
+                // Withdraw 1000 units from the wallet
+                $user->forceWithdraw(1000);
+                // Withdraw 1000 units from the wallet
+                $user->forceWithdraw(1000);
+                // Withdraw 1000 units from the wallet
+                $user->forceWithdraw(1000);
+                // Deposit 5000 units into the wallet
+                $user->deposit(5000);
+
+                // Throw an exception to simulate an error
+                throw new \Exception();
+            });
+
+            // This should not be reached
+            $this->assertTrue(false); // check
+        } catch (\Throwable $e) {
+            // Intentionally left empty
+        }
+
+        // Refresh the balance of the wallet to ensure it has not changed
+        $this->assertTrue($user->wallet->refreshBalance()); // check
+
+        // Retrieve the Buyer from the database and check that the balance is still 1000 units
+
+        /** @var Buyer $userFromDb */
+        $userFromDb = Buyer::find($user->getKey());
+
+        // Check that the balance of the wallet is 1000 units
+        $this->assertSame(1000, $userFromDb->balanceInt);
+        // Check that the balance of the wallet is 1000 units
+        $this->assertSame(1000, $user->balanceInt);
+    }
 }