1 files changed, 30 insertions, 0 deletions
diff --git a/test/scheduler/test_sleep.rb b/test/scheduler/test_sleep.rb
new file mode 100644
index 0000000000..0be760341e
--- /dev/null
+++ b/test/scheduler/test_sleep.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+require 'test/unit'
+require_relative 'scheduler'
+
+class TestSchedulerSleep < Test::Unit::TestCase
+  ITEMS = [0, 1, 2, 3, 4]
+
+  def test_sleep
+    items = []
+
+    thread = Thread.new do
+      scheduler = Scheduler.new
+      Thread.current.scheduler = scheduler
+
+      5.times do |i|
+        Fiber do
+          sleep(i/100.0)
+          items << i
+        end
+      end
+
+      # Should be 5 fibers waiting:
+      assert_equal scheduler.waiting.size, 5
+    end
+
+    thread.join
+
+    assert_equal ITEMS, items
+  end
+end