1 files changed, 25 insertions, 0 deletions
diff --git a/test/test_mutex_m.rb b/test/test_mutex_m.rb
new file mode 100644
index 0000000000..ab8927dd0f
--- /dev/null
+++ b/test/test_mutex_m.rb
@@ -0,0 +1,25 @@
+require 'test/unit'
+require 'thread'
+require 'mutex_m'
+
+class TestMutexM < Test::Unit::TestCase
+  def test_cv_wait
+    o = Object.new
+    o.extend(Mutex_m)
+    c = ConditionVariable.new
+    t = Thread.start {
+      o.synchronize do
+        until foo = o.instance_variable_get(:@foo)
+          c.wait(o)
+        end
+        foo
+      end
+    }
+    sleep(0.0001)
+    o.synchronize do
+      o.instance_variable_set(:@foo, "abc")
+    end
+    c.signal
+    assert_equal "abc", t.value
+  end
+end