1 files changed, 27 insertions, 0 deletions
diff --git a/spec/rubyspec/core/mutex/synchronize_spec.rb b/spec/rubyspec/core/mutex/synchronize_spec.rb
new file mode 100644
index 0000000000..ec64aa60fa
--- /dev/null
+++ b/spec/rubyspec/core/mutex/synchronize_spec.rb
@@ -0,0 +1,27 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Mutex#synchronize" do
+  it "wraps the lock/unlock pair in an ensure" do
+    m1 = Mutex.new
+    m2 = Mutex.new
+    m2.lock
+    synchronized = false
+
+    th = Thread.new do
+      lambda do
+        m1.synchronize do
+          synchronized = true
+          m2.lock
+          raise Exception
+        end
+      end.should raise_error(Exception)
+    end
+
+    Thread.pass until synchronized
+
+    m1.locked?.should be_true
+    m2.unlock
+    th.join
+    m1.locked?.should be_false
+  end
+end