+ tests for Revolt

Author: EdmondDantes

tests/fiber/020-fiber_gc_during_start.phpt

@@ -0,0 +1,54 @@
+--TEST--
+Fiber GC during another fiber start (Revolt scenario)
+--FILE--
+<?php
+
+use function Async\spawn;
+use function Async\await;
+
+echo "Test: Fiber GC during start\n";
+
+class FiberHolder {
+    private $fiber;
+
+    public function __construct() {
+        echo "FiberHolder created\n";
+        $this->fiber = new Fiber(function() {
+            echo "Temp fiber\n";
+        });
+    }
+
+    public function __destruct() {
+        echo "FiberHolder destroyed\n";
+    }
+}
+
+$c = spawn(function() {
+    // Create a temporary fiber holder (like Revolt's temporary driver)
+    $temp = new FiberHolder();
+
+    // Create the main fiber (like Revolt's actual driver)
+    $mainFiber = new Fiber(function() {
+        echo "Main fiber started\n";
+    });
+
+    // Unset temp to make it eligible for GC
+    unset($temp);
+
+    // Starting main fiber might trigger GC, which destroys temp
+    // This simulates what happens in Revolt when EventLoop::setDriver creates
+    // a temporary driver, then the real driver, and GC happens on fiber->start()
+    $mainFiber->start();
+
+    return "done";
+});
+
+await($c);
+echo "Test completed\n";
+?>
+--EXPECT--
+Test: Fiber GC during start
+FiberHolder created
+FiberHolder destroyed
+Main fiber started
+Test completed

tests/fiber/021-multiple_fibers_gc_on_start.phpt

@@ -0,0 +1,66 @@
+--TEST--
+Multiple fibers GC during start (Revolt driver scenario)
+--FILE--
+<?php
+
+use function Async\spawn;
+use function Async\await;
+
+echo "Test: Multiple fibers GC on start\n";
+
+class Driver {
+    private $loopFiber;
+    private $callbackFiber;
+
+    public function __construct() {
+        echo "Driver created\n";
+        // Simulate Revolt's loop fiber and callback fiber
+        $this->loopFiber = new Fiber(function() {
+            echo "Loop fiber\n";
+        });
+
+        $this->callbackFiber = new Fiber(function() {
+            echo "Callback fiber\n";
+        });
+    }
+
+    public function __destruct() {
+        echo "Driver destroyed\n";
+    }
+}
+
+$c = spawn(function() {
+    // Create temporary driver (like Revolt's GC protection driver)
+    $tempDriver = new Driver();
+
+    // Create actual driver
+    $actualDriver = new Driver();
+
+    // Replace temp with actual (simulates setDriver)
+    $tempDriver = null;
+
+    // Now create and start a fiber (simulates run())
+    // This should trigger GC which destroys the temp driver
+    $runFiber = new Fiber(function() {
+        echo "Run fiber started\n";
+    });
+
+    echo "About to start run fiber\n";
+    $runFiber->start();
+    echo "Run fiber completed\n";
+
+    return "done";
+});
+
+await($c);
+echo "Test completed\n";
+?>
+--EXPECT--
+Test: Multiple fibers GC on start
+Driver created
+Driver created
+About to start run fiber
+Driver destroyed
+Run fiber started
+Run fiber completed
+Test completed