1 files changed, 62 insertions, 1 deletions
diff --git a/test/test_timeout.rb b/test/test_timeout.rb
index 57eca3e478..dcd6206737 100644
--- a/test/test_timeout.rb
+++ b/test/test_timeout.rb
@@ -18,7 +18,7 @@ class TestTimeout < Test::Unit::TestCase
     }
     assert_nothing_raised("[ruby-dev:38319]") do
       Timeout.timeout(1) {
-        nil while @flag
+        sleep 0.01 while @flag
       }
     end
     assert !@flag, "[ruby-dev:38319]"
@@ -29,4 +29,65 @@ class TestTimeout < Test::Unit::TestCase
     def (n = Object.new).zero?; false; end
     assert_raise(TypeError, bug3168) {Timeout.timeout(n) { sleep 0.1 }}
   end
+
+  def test_timeout_immediate
+    begin
+      t = Thread.new {
+        Timeout.timeout(0.1, immediate: true) {
+          # loop forever, but can be interrupted
+          loop {}
+        }
+      }
+      sleep 0.5
+      t.raise RuntimeError
+      assert_raise(Timeout::Error) {
+        t.join
+      }
+    ensure
+      t.kill if t.alive?
+      begin
+        t.join
+      rescue Exception
+      end
+    end
+  end
+
+  def test_timeout_immediate2
+    begin
+      t = Thread.new {
+        Timeout.timeout(0.1) {
+          # loop forever, must not interrupted
+          loop {}
+        }
+      }
+      sleep 0.5
+      t.raise RuntimeError
+      assert_raise(RuntimeError) {
+        t.join
+      }
+    ensure
+      t.kill if t.alive?
+      begin
+        t.join
+      rescue Exception
+      end
+    end
+  end
+
+  def test_timeout_blocking
+    t0 = Time.now
+    begin
+      Timeout.timeout(0.1) {
+        while true do
+          t1 = Time.now
+          break if t1 - t0 > 1
+        end
+        sleep 2
+      }
+    rescue Timeout::Error
+    end
+    t1 = Time.now
+    assert (t1 - t0) >= 1
+    assert (t1 - t0) < 2
+  end
 end