--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/test-idle.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,125 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "uv.h"
+#include "task.h"
+
+
+static uv_idle_t idle_handle;
+static uv_check_t check_handle;
+static uv_timer_t timer_handle;
+
+static int idle_cb_called = 0;
+static int check_cb_called = 0;
+static int timer_cb_called = 0;
+static int close_cb_called = 0;
+
+
+static void close_cb(uv_handle_t* handle) {
+  close_cb_called++;
+}
+
+
+static void timer_cb(uv_timer_t* handle) {
+  ASSERT_PTR_EQ(handle, &timer_handle);
+
+  uv_close((uv_handle_t*) &idle_handle, close_cb);
+  uv_close((uv_handle_t*) &check_handle, close_cb);
+  uv_close((uv_handle_t*) &timer_handle, close_cb);
+
+  timer_cb_called++;
+  fprintf(stderr, "timer_cb %d\n", timer_cb_called);
+  fflush(stderr);
+}
+
+
+static void idle_cb(uv_idle_t* handle) {
+  ASSERT_PTR_EQ(handle, &idle_handle);
+
+  idle_cb_called++;
+  fprintf(stderr, "idle_cb %d\n", idle_cb_called);
+  fflush(stderr);
+}
+
+
+static void check_cb(uv_check_t* handle) {
+  ASSERT_PTR_EQ(handle, &check_handle);
+
+  check_cb_called++;
+  fprintf(stderr, "check_cb %d\n", check_cb_called);
+  fflush(stderr);
+}
+
+
+TEST_IMPL(idle_starvation) {
+  int r;
+
+  r = uv_idle_init(uv_default_loop(), &idle_handle);
+  ASSERT_OK(r);
+  r = uv_idle_start(&idle_handle, idle_cb);
+  ASSERT_OK(r);
+
+  r = uv_check_init(uv_default_loop(), &check_handle);
+  ASSERT_OK(r);
+  r = uv_check_start(&check_handle, check_cb);
+  ASSERT_OK(r);
+
+  r = uv_timer_init(uv_default_loop(), &timer_handle);
+  ASSERT_OK(r);
+  r = uv_timer_start(&timer_handle, timer_cb, 50, 0);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_GT(idle_cb_called, 0);
+  ASSERT_EQ(1, timer_cb_called);
+  ASSERT_EQ(3, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+static void idle_stop(uv_idle_t* handle) {
+  uv_idle_stop(handle);
+}
+
+
+TEST_IMPL(idle_check) {
+  ASSERT_OK(uv_idle_init(uv_default_loop(), &idle_handle));
+  ASSERT_OK(uv_idle_start(&idle_handle, idle_stop));
+
+  ASSERT_OK(uv_check_init(uv_default_loop(), &check_handle));
+  ASSERT_OK(uv_check_start(&check_handle, check_cb));
+
+  ASSERT_EQ(1, uv_run(uv_default_loop(), UV_RUN_ONCE));
+  ASSERT_EQ(1, check_cb_called);
+
+  ASSERT_OK(close_cb_called);
+  uv_close((uv_handle_t*) &idle_handle, close_cb);
+  uv_close((uv_handle_t*) &check_handle, close_cb);
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_ONCE));
+  ASSERT_EQ(2, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}