handles toThrow exception with a "class not found" error

src/Expectation.php

@@ -6,6 +6,7 @@ namespace Pest;
 
 use BadMethodCallException;
 use Closure;
+use Error;
 use InvalidArgumentException;
 use Pest\Concerns\Extendable;
 use Pest\Concerns\RetrievesValues;
@@ -911,8 +912,12 @@ final class Expectation
 
         try {
             ($this->value)();
-        } catch (Throwable $e) { // @phpstan-ignore-line
+        } catch (Throwable $e) {
             if (!class_exists($exception)) {
+                if ($e instanceof Error && (bool) preg_match("/Class [\"']{$exception}[\"'] not found/", $e->getMessage())) {
+                    throw $e;
+                }
+
                 Assert::assertStringContainsString($exception, $e->getMessage());
 
                 return $this;

src/Support/Backtrace.php

@@ -26,6 +26,7 @@ final class Backtrace
         $current = null;
 
         foreach (debug_backtrace(self::BACKTRACE_OPTIONS) as $trace) {
+            assert(array_key_exists(self::FILE, $trace));
             if (Str::endsWith($trace[self::FILE], (string) realpath('vendor/phpunit/phpunit/src/Util/FileLoader.php'))) {
                 break;
             }
@@ -45,7 +46,11 @@ final class Backtrace
      */
     public static function file(): string
     {
-        return debug_backtrace(self::BACKTRACE_OPTIONS)[1][self::FILE];
+        $trace = debug_backtrace(self::BACKTRACE_OPTIONS)[1];
+
+        assert(array_key_exists(self::FILE, $trace));
+
+        return $trace[self::FILE];
     }
 
     /**
@@ -53,7 +58,11 @@ final class Backtrace
      */
     public static function dirname(): string
     {
-        return dirname(debug_backtrace(self::BACKTRACE_OPTIONS)[1][self::FILE]);
+        $trace = debug_backtrace(self::BACKTRACE_OPTIONS)[1];
+
+        assert(array_key_exists(self::FILE, $trace));
+
+        return dirname($trace[self::FILE]);
     }
 
     /**
@@ -61,6 +70,10 @@ final class Backtrace
      */
     public static function line(): int
     {
-        return debug_backtrace(self::BACKTRACE_OPTIONS)[1]['line'];
+        $trace = debug_backtrace(self::BACKTRACE_OPTIONS)[1];
+
+        assert(array_key_exists('line', $trace));
+
+        return $trace['line'];
     }
 }

tests/.snapshots/success.txt

@@ -496,6 +496,8 @@
   ✓ not failures
   ✓ closure missing parameter
   ✓ closure missing type-hint
+  ✓ it can handle a non-defined exception
+  ✓ it can handle a class not found Error
 
    PASS  Tests\Features\Expect\unless
   ✓ it pass
@@ -720,5 +722,5 @@
   ✓ it is a test
   ✓ it uses correct parent class
 
-  Tests:  4 incompleted, 9 skipped, 478 passed
+  Tests:  4 incompleted, 9 skipped, 480 passed