Simplify Monitor#try_enter spec.

Author: aardvark179

spec/ruby/library/monitor/try_enter_spec.rb

@@ -7,11 +7,8 @@
     10.times do
 
       thread = Thread.new do
-        begin
-          val = monitor.try_enter
-        ensure
-          monitor.exit if val
-        end
+        val = monitor.try_enter
+        monitor.exit if val
         val
       end
 
@@ -23,35 +20,19 @@
   it "will not acquire a monitor already held by another thread" do
     monitor = Monitor.new
     10.times do
-      locked = false
-
-      thread1 = Thread.new do
-        begin
-          monitor.enter
-          locked = true
-          sleep # wait for wakeup.
-        ensure
-          monitor.exit
-        end
-      end
-
-      Thread.pass until locked
-      monitor.mon_locked?.should == true
-
-      thread2 = Thread.new do
-        begin
+      monitor.enter
+      begin
+        thread = Thread.new do
           val = monitor.try_enter
-        ensure
           monitor.exit if val
+          val
         end
-        val
-      end
-
-      thread2.join
-      thread2.value.should == false
 
-      thread1.wakeup
-      thread1.join
+        thread.join
+        thread.value.should == false
+      ensure
+        monitor.exit
+      end
       monitor.mon_locked?.should == false
     end
   end