From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/ruby/test/monitor/test_monitor.rb | 209 ++++++++++++++++++++++++++++++++++
 1 file changed, 209 insertions(+)
 create mode 100644 jni/ruby/test/monitor/test_monitor.rb

(limited to 'jni/ruby/test/monitor/test_monitor.rb')

diff --git a/jni/ruby/test/monitor/test_monitor.rb b/jni/ruby/test/monitor/test_monitor.rb
new file mode 100644
index 0000000..451e26c
--- /dev/null
+++ b/jni/ruby/test/monitor/test_monitor.rb
@@ -0,0 +1,209 @@
+require "monitor"
+require "thread"
+
+require "test/unit"
+
+class TestMonitor < Test::Unit::TestCase
+  def setup
+    @monitor = Monitor.new
+  end
+
+  def test_enter
+    ary = []
+    queue = Queue.new
+    th = Thread.start {
+      queue.pop
+      @monitor.enter
+      for i in 6 .. 10
+        ary.push(i)
+        Thread.pass
+      end
+      @monitor.exit
+    }
+    th2 = Thread.start {
+      @monitor.enter
+      queue.enq(nil)
+      for i in 1 .. 5
+        ary.push(i)
+        Thread.pass
+      end
+      @monitor.exit
+    }
+    assert_join_threads([th, th2])
+    assert_equal((1..10).to_a, ary)
+  end
+
+  def test_synchronize
+    ary = []
+    queue = Queue.new
+    th = Thread.start {
+      queue.pop
+      @monitor.synchronize do
+        for i in 6 .. 10
+          ary.push(i)
+          Thread.pass
+        end
+      end
+    }
+    th2 = Thread.start {
+      @monitor.synchronize do
+        queue.enq(nil)
+        for i in 1 .. 5
+          ary.push(i)
+          Thread.pass
+        end
+      end
+    }
+    assert_join_threads([th, th2])
+    assert_equal((1..10).to_a, ary)
+  end
+
+  def test_killed_thread_in_synchronize
+    ary = []
+    queue = Queue.new
+    t1 = Thread.start {
+      queue.pop
+      @monitor.synchronize {
+        ary << :t1
+      }
+    }
+    t2 = Thread.start {
+      queue.pop
+      @monitor.synchronize {
+        ary << :t2
+      }
+    }
+    t3 = Thread.start {
+      @monitor.synchronize do
+        queue.enq(nil)
+        queue.enq(nil)
+        assert_equal([], ary)
+        t1.kill
+        t2.kill
+        ary << :main
+      end
+      assert_equal([:main], ary)
+    }
+    assert_join_threads([t1, t2, t3])
+  end
+
+  def test_try_enter
+    queue1 = Queue.new
+    queue2 = Queue.new
+    th = Thread.start {
+      queue1.deq
+      @monitor.enter
+      queue2.enq(nil)
+      queue1.deq
+      @monitor.exit
+      queue2.enq(nil)
+    }
+    th2 = Thread.start {
+      assert_equal(true, @monitor.try_enter)
+      @monitor.exit
+      queue1.enq(nil)
+      queue2.deq
+      assert_equal(false, @monitor.try_enter)
+      queue1.enq(nil)
+      queue2.deq
+      assert_equal(true, @monitor.try_enter)
+    }
+    assert_join_threads([th, th2])
+  end
+
+  def test_cond
+    cond = @monitor.new_cond
+
+    a = "foo"
+    queue1 = Queue.new
+    th = Thread.start do
+      queue1.deq
+      @monitor.synchronize do
+        a = "bar"
+        cond.signal
+      end
+    end
+    th2 = Thread.start do
+      @monitor.synchronize do
+        queue1.enq(nil)
+        assert_equal("foo", a)
+        result1 = cond.wait
+        assert_equal(true, result1)
+        assert_equal("bar", a)
+      end
+    end
+    assert_join_threads([th, th2])
+  end
+
+  def test_timedwait
+    cond = @monitor.new_cond
+    b = "foo"
+    queue2 = Queue.new
+    th = Thread.start do
+      queue2.deq
+      @monitor.synchronize do
+        b = "bar"
+        cond.signal
+      end
+    end
+    th2 = Thread.start do
+      @monitor.synchronize do
+        queue2.enq(nil)
+        assert_equal("foo", b)
+        result2 = cond.wait(0.1)
+        assert_equal(true, result2)
+        assert_equal("bar", b)
+      end
+    end
+    assert_join_threads([th, th2])
+
+    c = "foo"
+    queue3 = Queue.new
+    th = Thread.start do
+      queue3.deq
+      @monitor.synchronize do
+        c = "bar"
+        cond.signal
+      end
+    end
+    th2 = Thread.start do
+      @monitor.synchronize do
+        assert_equal("foo", c)
+        result3 = cond.wait(0.1)
+        assert_equal(true, result3) # wait always returns true in Ruby 1.9
+        assert_equal("foo", c)
+        queue3.enq(nil)
+        result4 = cond.wait
+        assert_equal(true, result4)
+        assert_equal("bar", c)
+      end
+    end
+    assert_join_threads([th, th2])
+
+#     d = "foo"
+#     cumber_thread = Thread.start {
+#       loop do
+#         @monitor.synchronize do
+#           d = "foo"
+#         end
+#       end
+#     }
+#     queue3 = Queue.new
+#     Thread.start do
+#       queue3.pop
+#       @monitor.synchronize do
+#         d = "bar"
+#         cond.signal
+#       end
+#     end
+#     @monitor.synchronize do
+#       queue3.enq(nil)
+#       assert_equal("foo", d)
+#       result5 = cond.wait
+#       assert_equal(true, result5)
+#       # this thread has priority over cumber_thread
+#       assert_equal("bar", d)
+#     end
+#     cumber_thread.kill
+  end
+end
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