RuleLevelHelper - consider trait as an unknown class

Author: ondrejmirtes

src/Rules/RuleLevelHelper.php

@@ -172,7 +172,10 @@ public function findTypeToCheck(
 		$directClassNames = TypeUtils::getDirectClassNames($type);
 		foreach ($directClassNames as $referencedClass) {
 			if ($this->reflectionProvider->hasClass($referencedClass)) {
-				continue;
+				$classReflection = $this->reflectionProvider->getClass($referencedClass);
+				if (!$classReflection->isTrait()) {
+					continue;
+				}
 			}
 
 			$errors[] = RuleErrorBuilder::message(sprintf($unknownClassErrorPattern, $referencedClass))->line($var->getLine())->build();

tests/PHPStan/Rules/Methods/CallStaticMethodsRuleTest.php

@@ -220,6 +220,10 @@ public function testCallStaticMethods(): void
 				'Call to static method doFoo() on trait CallStaticMethods\TraitWithStaticMethod.',
 				323,
 			],
+			[
+				'Call to static method doFoo() on an unknown class CallStaticMethods\TraitWithStaticMethod.',
+				328,
+			],
 		]);
 	}
 

tests/PHPStan/Rules/Methods/data/call-static-methods.php

@@ -323,4 +323,9 @@ public function doFoo(): void
 		TraitWithStaticMethod::doFoo();
 	}
 
+	public function doBar(TraitWithStaticMethod $a): void
+	{
+		$a::doFoo();
+	}
+
 }