From c54f272296ba15f7b65c38363d077dc758065df7 Mon Sep 17 00:00:00 2001
From: "anton.bashirov" <anton.sh.local@gmail.com>
Date: Mon, 9 Sep 2024 22:25:46 +0400
Subject: [PATCH] fibers

---
 sdk/lib/isolate/isolate.dart          |  2 +-
 tests/lib/fiber/fiber_exceptions.dart | 32 +++++++-----
 tests/lib/fiber/fiber_test.dart       | 74 +++++++++++++++++++--------
 3 files changed, 73 insertions(+), 35 deletions(-)

diff --git a/sdk/lib/isolate/isolate.dart b/sdk/lib/isolate/isolate.dart
index e906cd76b4e7..d9362c34b5a0 100644
--- a/sdk/lib/isolate/isolate.dart
+++ b/sdk/lib/isolate/isolate.dart
@@ -89,7 +89,7 @@ final class Isolate {
   ///
   /// Some control messages require a specific capability to be passed along
   /// with the message (see [pauseCapability] and [terminateCapability]),
-  /// otherwise the message is ignored by the isolate.
+  /// otherwise the message is ignored by the isolate.ц
   final SendPort controlPort;
 
   /// Capability granting the ability to pause the isolate.
diff --git a/tests/lib/fiber/fiber_exceptions.dart b/tests/lib/fiber/fiber_exceptions.dart
index 2b4743f9c162..89961c38c13f 100644
--- a/tests/lib/fiber/fiber_exceptions.dart
+++ b/tests/lib/fiber/fiber_exceptions.dart
@@ -6,8 +6,6 @@ void main() {
   _run(mainException: true);
   _run(childException: true);
   _run(childException: true, mainCatchChild: true);
-  _run(mainYield: true);
-  _run(mainYield: true, mainCatchChild: true);
   _run(childYield: true);
   _run(childYield: true, mainCatchChild: true);
 }
@@ -28,12 +26,16 @@ void _run({mainException = false, childException = false, mainCatchChild = false
         name: "child");
     if (mainCatchChild) {
       final main = Fiber.main(
-          entry: () => Expect.equals(
-              Expect.throws<FiberException>(() {
-                Fiber.spawn(child);
-                Fiber.suspend();
-              }).message,
-              "child"));
+        entry: () => Expect.equals(
+          Expect.throws<FiberException>(
+            () {
+              Fiber.spawn(child);
+              Fiber.suspend();
+            },
+          ).message,
+          "child",
+        ),
+      );
       main.start();
       return;
     }
@@ -48,12 +50,14 @@ void _run({mainException = false, childException = false, mainCatchChild = false
     final child = Fiber.child(entry: () => Fiber.suspend(), name: "child");
     if (mainCatchChild) {
       final main = Fiber.main(
-          entry: () => Expect.equals(
-              Expect.throws<FiberException>(() {
-                Fiber.spawn(child);
-                throw FiberException("main");
-              }).message,
-              "main"));
+        entry: () => Expect.equals(
+          Expect.throws<FiberException>(() {
+            Fiber.spawn(child);
+            throw FiberException("main");
+          }).message,
+          "main",
+        ),
+      );
       main.start();
       return;
     }
diff --git a/tests/lib/fiber/fiber_test.dart b/tests/lib/fiber/fiber_test.dart
index d66b9bb9e923..4824f50abcf9 100644
--- a/tests/lib/fiber/fiber_test.dart
+++ b/tests/lib/fiber/fiber_test.dart
@@ -10,29 +10,63 @@ var commonState = "";
 void main() {
   mainFiber.start();
   var variable = "variable";
-  Fiber.main(entry: () {
-    Expect.equals("variable", variable);
-    variable = "after fiber";
-  }).start();
+  Fiber.main(
+    entry: () {
+      Expect.equals("variable", variable);
+      variable = "after fiber";
+    },
+  ).start();
   Expect.equals("after fiber", variable);
   variable = "variable";
-  Fiber.main(entry: () {
-    Expect.equals("variable", variable);
-    variable = "after main fiber";
-    Fiber.spawn(Fiber.child(
-        entry: () {
-          Expect.equals("after main fiber", variable);
-          variable = "after child fiber";
-          Fiber.suspend();
-          Expect.equals("after child fiber after main fiber", variable);
-          variable = "finish";
-        },
-        name: "child"));
-    Expect.equals("after child fiber", variable);
-    variable = "after child fiber after main fiber";
-    Fiber.suspend();
-  }).start();
+  Fiber.main(
+    entry: () {
+      Expect.equals("variable", variable);
+      variable = "after main fiber";
+      Fiber.spawn(
+        Fiber.child(
+          entry: () {
+            Expect.equals("after main fiber", variable);
+            variable = "after child fiber";
+            Fiber.suspend();
+            Expect.equals("after child fiber after main fiber", variable);
+            variable = "finish";
+          },
+          name: "child",
+        ),
+      );
+      Expect.equals("after child fiber", variable);
+      variable = "after child fiber after main fiber";
+      Fiber.suspend();
+    },
+  ).start();
   Expect.equals("finish", variable);
+
+  variable = "level 1";
+  Fiber.main(
+    entry: () {
+      Expect.equals("level 1", variable);
+      variable = "level 2";
+      Fiber.spawn(
+        Fiber.child(
+          entry: () {
+            Expect.equals("level 2", variable);
+            variable = "level 3";
+            Fiber.spawn(
+              Fiber.child(
+                name: "child",
+                entry: () {
+                  Expect.equals("level 3", variable);
+                  variable = "level 4";
+                },
+              ),
+            );
+          },
+          name: "child",
+        ),
+      );
+    },
+  ).start();
+  Expect.equals("level 4", variable);
 }
 
 void mainEntry() {