feat: clarfies that high order testing does not support bound datasets

src/Concerns/Testable.php

@@ -290,7 +290,7 @@ trait Testable
             return $arguments;
         }
 
-        if (in_array($testParameterTypes[0], [Closure::class, 'callable'])) {
+        if (isset($testParameterTypes[0]) && in_array($testParameterTypes[0], [Closure::class, 'callable'])) {
             return $arguments;
         }
 

src/Support/Reflection.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace Pest\Support;
 
 use Closure;
+use InvalidArgumentException;
 use Pest\Exceptions\ShouldNotHappen;
 use Pest\TestSuite;
 use ReflectionClass;
@@ -66,9 +67,17 @@ final class Reflection
     {
         $test = TestSuite::getInstance()->test;
 
-        return $test instanceof \PHPUnit\Framework\TestCase
+        if (! $test instanceof \PHPUnit\Framework\TestCase) {
-            ? Closure::fromCallable($callable)->bindTo($test)(...$test->providedData())
+            return self::bindCallable($callable);
-            : self::bindCallable($callable);
+        }
+
+        foreach ($test->providedData() as $value) {
+            if ($value instanceof Closure) {
+                throw new InvalidArgumentException('Bound datasets are not supported while doing high order testing.');
+            }
+        }
+
+        return Closure::fromCallable($callable)->bindTo($test)(...$test->providedData());
     }
 
     /**

tests/Features/DatasetsTests.php

@@ -361,3 +361,23 @@ it('can correctly resolve a bound dataset that returns an array but wants to be
 ]);
 
 todo('forbids to define tests in Datasets dirs and Datasets.php files');
+
+dataset('greeting-string', [
+    'formal' => 'Evening',
+    'informal' => 'yo',
+]);
+
+it('may be used with high order')
+    ->with('greeting-string')
+    ->expect(fn (string $greeting) => $greeting)
+    ->throwsNoExceptions();
+
+dataset('greeting-bound', [
+    'formal' => fn () => 'Evening',
+    'informal' => fn () => 'yo',
+]);
+
+it('may be used with high order even when bound')
+    ->with('greeting-bound')
+    ->expect(fn (string $greeting) => $greeting)
+    ->throws(InvalidArgumentException::class);