Add regression test for always off sampler

Author: tidal

tests/integration/instrumentation/Symfony/OtelSdkBundle/DependencyInjection/OtelSdkExtensionTest.php

@@ -102,6 +102,14 @@ public function testSamplers(): void
     {
         $this->loadTestData('sampler');
 
+        $sampler = $this->getDefinitionByClass(SDK\Trace\TracerProvider::class)
+            ->getArgument(1);
+
+        $this->assertReference(
+            SDK\Trace\Sampler\ParentBased::class,
+            $sampler
+        );
+
         $parent = $this->getDefinitionByClass(SDK\Trace\Sampler\ParentBased::class);
         $arguments = $parent->getArguments();
 
@@ -132,6 +140,34 @@ public function testSamplers(): void
         );
     }
 
+    public function testAlwaysOffRootSamplerRegression(): void
+    {
+        $data = $this->retrieveTestData('simple');
+        $data['trace']['sampler'] = 'always_off';
+
+        $this->load(
+            self::wrapConfig(
+                $data
+            )
+        );
+
+        $sampler = $this->getDefinitionByClass(SDK\Trace\TracerProvider::class)
+            ->getArgument(1);
+
+        $this->assertReference(
+            SDK\Trace\Sampler\ParentBased::class,
+            $sampler
+        );
+
+        $parent = $this->getDefinitionByClass(SDK\Trace\Sampler\ParentBased::class);
+        $arguments = $parent->getArguments();
+
+        $this->assertReference(
+            SDK\Trace\Sampler\AlwaysOffSampler::class,
+            $arguments[0]
+        );
+    }
+
     /**
      * @throws Exception
      */