Add spec for monitor condition variables.

Author: aardvark179

spec/ruby/library/monitor/new_cond_spec.rb

@@ -0,0 +1,88 @@
+require_relative '../../spec_helper'
+require 'monitor'
+
+describe "Monitor#new_cond" do
+  it "creates a MonitorMixin::ConditoinVariable" do
+    m = Monitor.new
+    c = m.new_cond
+    c.class.should == MonitorMixin::ConditionVariable
+  end
+
+  it 'returns a condition variable which can be waited on by a thread holding the monitor' do
+    m = Monitor.new
+    c = m.new_cond
+
+    10.times do
+
+      locked = false
+      thread = Thread.new do
+        m.synchronize do
+          locked = true
+          c.wait
+        end
+        :done
+      end
+
+      Thread.pass until locked
+      Thread.pass until thread.stop?
+
+      m.synchronize { c.signal }
+
+      thread.join
+      thread.value.should == :done
+    end
+  end
+
+  it 'returns a condition variable which can be waited on by a thread holding the monitor inside multiple synchronize blocks' do
+    m = Monitor.new
+    c = m.new_cond
+
+    10.times do
+
+      locked = false
+      thread = Thread.new do
+        m.synchronize do
+          m.synchronize do
+            locked = true
+            c.wait
+          end
+        end
+        :done
+      end
+
+      Thread.pass until locked
+      Thread.pass until thread.stop?
+
+      m.synchronize { c.signal }
+
+      thread.join
+      thread.value.should == :done
+    end
+  end
+
+  it 'returns a condition variable which can be signalled by a thread holding the monitor inside multiple synchronize blocks' do
+    m = Monitor.new
+    c = m.new_cond
+
+    10.times do
+
+      locked = false
+      thread = Thread.new do
+        m.synchronize do
+          locked = true
+          c.wait
+        end
+        :done
+      end
+
+      Thread.pass until locked
+      Thread.pass until thread.stop?
+
+      m.synchronize { m.synchronize { c.signal } }
+
+      thread.join
+      thread.value.should == :done
+    end
+  end
+
+end