Do nothing if steps not connected during reducing steps

src/Exception/LogicException.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace Tienvx\Bundle\MbtBundle\Exception;
+
+class LogicException extends \LogicException implements ExceptionInterface
+{
+}

src/Exception/StepsNotConnectedException.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace Tienvx\Bundle\MbtBundle\Exception;
+
+class StepsNotConnectedException extends LogicException
+{
+}

src/Reducer/HandlerTemplate.php

@@ -4,6 +4,7 @@
 
 use Symfony\Component\Messenger\MessageBusInterface;
 use Throwable;
+use Tienvx\Bundle\MbtBundle\Exception\StepsNotConnectedException;
 use Tienvx\Bundle\MbtBundle\Message\ReduceBugMessage;
 use Tienvx\Bundle\MbtBundle\Model\BugInterface;
 use Tienvx\Bundle\MbtBundle\Repository\BugRepositoryInterface;
@@ -31,7 +32,12 @@ public function __construct(
 
     public function handle(BugInterface $bug, int $from, int $to): void
     {
-        $newSteps = iterator_to_array($this->stepsBuilder->create($bug, $from, $to));
+        try {
+            $newSteps = iterator_to_array($this->stepsBuilder->create($bug, $from, $to));
+        } catch (StepsNotConnectedException $exception) {
+            return;
+        }
+
         if (count($newSteps) >= count($bug->getSteps())) {
             return;
         }

src/Service/Step/Builder/ShortestPathStepsBuilder.php

@@ -6,9 +6,9 @@
 use JMGQ\AStar\AStar;
 use SingleColorPetrinet\Model\PetrinetInterface;
 use SingleColorPetrinet\Service\GuardedTransitionServiceInterface;
-use Symfony\Component\Messenger\Exception\UnrecoverableMessageHandlingException;
 use Tienvx\Bundle\MbtBundle\Exception\ExceptionInterface;
 use Tienvx\Bundle\MbtBundle\Exception\OutOfRangeException;
+use Tienvx\Bundle\MbtBundle\Exception\StepsNotConnectedException;
 use Tienvx\Bundle\MbtBundle\Model\Bug\Step;
 use Tienvx\Bundle\MbtBundle\Model\Bug\StepInterface;
 use Tienvx\Bundle\MbtBundle\Model\BugInterface;
@@ -69,7 +69,7 @@ protected function getRemainingSteps(array $steps, StepInterface $lastStep, Petr
             }
             $transition = $petrinet->getTransitionById($step->getTransition());
             if (!$this->transitionService->isEnabled($transition, $marking)) {
-                throw new UnrecoverableMessageHandlingException('Can not connect remaining steps');
+                throw new StepsNotConnectedException('Can not connect remaining steps');
             }
             $this->transitionService->fire($transition, $marking);
             yield new Step(

tests/Reducer/HandlerTestCase.php

@@ -3,6 +3,7 @@
 namespace Tienvx\Bundle\MbtBundle\Tests\Reducer;
 
 use Exception;
+use PHPUnit\Framework\MockObject\Stub\Stub;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Messenger\Envelope;
 use Symfony\Component\Messenger\MessageBusInterface;
@@ -11,6 +12,7 @@
 use Tienvx\Bundle\MbtBundle\Entity\Model\Revision;
 use Tienvx\Bundle\MbtBundle\Entity\Task;
 use Tienvx\Bundle\MbtBundle\Exception\RuntimeException;
+use Tienvx\Bundle\MbtBundle\Exception\StepsNotConnectedException;
 use Tienvx\Bundle\MbtBundle\Message\ReduceBugMessage;
 use Tienvx\Bundle\MbtBundle\Model\Bug\StepInterface;
 use Tienvx\Bundle\MbtBundle\Model\BugInterface;
@@ -64,13 +66,21 @@ protected function setUp(): void
             ->willReturn((fn () => yield from $this->newSteps)());
     }
 
+    public function testHandleNotConnectedSteps(): void
+    {
+        $this->expectStepsBuilder($this->throwException(new StepsNotConnectedException()));
+        $this->stepsRunner->expects($this->never())->method('run');
+        $this->handler->handle($this->bug, 1, 2);
+    }
+
     public function testHandleOldBug(): void
     {
         $this->bug->setSteps([
             $this->createMock(StepInterface::class),
             $this->createMock(StepInterface::class),
             $this->createMock(StepInterface::class),
         ]);
+        $this->expectStepsBuilder($this->returnValue((fn () => yield from $this->newSteps)()));
         $this->stepsRunner->expects($this->never())->method('run');
         $this->handler->handle($this->bug, 1, 2);
     }
@@ -80,6 +90,7 @@ public function testHandleOldBug(): void
      */
     public function testHandle(?Throwable $exception, bool $updateSteps): void
     {
+        $this->expectStepsBuilder($this->returnValue((fn () => yield from $this->newSteps)()));
         $this->stepsRunner->expects($this->once())
             ->method('run')
             ->with(
@@ -119,4 +130,13 @@ public function exceptionProvider(): array
             [new Exception('Something wrong'), true],
         ];
     }
+
+    protected function expectStepsBuilder(Stub $will): void
+    {
+        $this->stepsBuilder
+            ->expects($this->once())
+            ->method('create')
+            ->with($this->bug, 1, 2)
+            ->will($will);
+    }
 }

tests/Service/Step/Builder/ShortestPathStepsBuilderTest.php

@@ -15,11 +15,11 @@
 use SingleColorPetrinet\Model\PetrinetInterface;
 use SingleColorPetrinet\Service\GuardedTransitionService;
 use SingleColorPetrinet\Service\GuardedTransitionServiceInterface;
-use Symfony\Component\Messenger\Exception\UnrecoverableMessageHandlingException;
 use Tienvx\Bundle\MbtBundle\Entity\Bug;
 use Tienvx\Bundle\MbtBundle\Entity\Model\Revision;
 use Tienvx\Bundle\MbtBundle\Entity\Task;
 use Tienvx\Bundle\MbtBundle\Exception\OutOfRangeException;
+use Tienvx\Bundle\MbtBundle\Exception\StepsNotConnectedException;
 use Tienvx\Bundle\MbtBundle\Model\Bug\Step;
 use Tienvx\Bundle\MbtBundle\Service\Petrinet\MarkingHelper;
 use Tienvx\Bundle\MbtBundle\Service\Petrinet\MarkingHelperInterface;
@@ -294,7 +294,7 @@ public function testGetShortestPathBetweenSameSteps(): void
     public function testGetShortestPathFromCartEmptyToFourProductsInCart(): void
     {
         $this->expectsPetrinetHelper();
-        $this->expectExceptionObject(new UnrecoverableMessageHandlingException('Can not connect remaining steps'));
+        $this->expectExceptionObject(new StepsNotConnectedException('Can not connect remaining steps'));
         iterator_to_array($this->stepsBuilder->create($this->bug, 0, 6));
     }