feat: add has stages (#7)

Co-authored-by: Tortitas <victorgf2011@gmail.com>

.gitignore

@@ -1,6 +1,8 @@
 /vendor
 /build
+/composer-local.json
 /composer.lock
+/composer-local.lock
 /.php_cs.cache
 /.phpunit.result.cache
 /.php-cs-fixer.cache

src/PipeLine.php

@@ -37,6 +37,11 @@ public function process($payload, array $options = [])
         return $payload;
     }
 
+    public function hasStages(): bool
+    {
+        return count($this->stages) > 0;
+    }
+
     private function processStage(Stage $stage, $payload, $options)
     {
         $stage->options($options);

tests/PipelineTest.php

@@ -20,6 +20,15 @@ public function testPipeline()
         $this->assertEquals(10, ThreePipeline::getInstance()->process(10));
     }
 
+    public function testHasStages()
+    {
+        $this->injections();
+
+        $this->assertTrue(OnePipeline::getInstance()->hasStages());
+        $this->assertTrue(TwoPipeline::getInstance()->hasStages());
+        $this->assertFalse(ThreePipeline::getInstance()->hasStages());
+    }
+
     private function injections()
     {
         OnePipeline::getInstance()->pipe(new DoubleStage())->pipe(new IncreaseStage());