Fix

Author: samsonasik

src/Assert/Filter.php

@@ -9,12 +9,9 @@
 use ReflectionFunction;
 use ReflectionMethod;
 use ReflectionNamedType;
-use Webmozart\Assert\Assert;
 
-use function explode;
 use function is_object;
 use function sprintf;
-use function str_contains;
 
 final class Filter
 {
@@ -25,14 +22,7 @@ public static function boolean(callable $filter): void
         } elseif (is_object($filter)) {
             $reflection = new ReflectionMethod($filter, '__invoke');
         } else {
-            Assert::string($filter);
-
-            if (! str_contains($filter, '::')) {
-                $reflection = new ReflectionFunction($filter);
-            } else {
-                [, $method] = explode('::', $filter);
-                $reflection = new ReflectionMethod($filter, $method);
-            }
+            throw new InvalidArgumentException('Expected Closure or invokable object, string given');
         }
 
         $returnType = $reflection->getReturnType();

src/Collector.php

@@ -68,8 +68,8 @@ public function getResults(): array
         // ensure transform property is set early ->withTransform() method
         Assert::isCallable($this->transform);
 
-        $count          = 0;
-        $collectedData  = [];
+        $count         = 0;
+        $collectedData = [];
 
         if (is_callable($this->when)) {
             // filter must be a callable with bool return type

tests/FilterTest.php

@@ -23,6 +23,17 @@ public function __invoke(int $datum): bool
         $this->assertTrue(AtLeast::once($data, $filter));
     }
 
+    public function testOnceWithStringFilter(): void
+    {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('Expected Closure or invokable object, string given');
+
+        $data   = [1, 'f'];
+        $filter = 'is_string';
+
+        AtLeast::once($data, $filter);
+    }
+
     public function testWithoutReturnTypeCallable(): void
     {
         $this->expectException(InvalidArgumentException::class);
@@ -39,7 +50,7 @@ public function __invoke(int $datum)
         };
         // phpcs:enable
 
-        $this->assertTrue(AtLeast::once($data, $filter));
+        AtLeast::once($data, $filter);
     }
 
     public function testWithNonBoolReturnTypeCallable(): void
@@ -55,6 +66,6 @@ public function __invoke(int $datum): string
             }
         };
 
-        $this->assertTrue(AtLeast::once($data, $filter));
+        AtLeast::once($data, $filter);
     }
 }