* lib/thread.rb (SizedQueue#max=) raise ArgumentError if max is not

  positive number. patch by Masaki Matsushita.
  [ruby-dev:44449] [Bug #5259]

* test/thread/test_queue.rb (test_sized_queue_initialize,
  test_sized_queue_assign_max): add tests for it.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33170 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 18 insertions, 0 deletions

diff --git a/test/thread/test_queue.rb b/test/thread/test_queue.rb
index b0ffe0866d..685b41a54f 100644
--- a/test/thread/test_queue.rb
+++ b/test/thread/test_queue.rb
@@ -35,4 +35,22 @@ class TestQueue < Test::Unit::TestCase
     assert_equal 0, from_workers.size
     assert_equal 0, to_workers.size
   end
+
+  def test_sized_queue_initialize
+    q = SizedQueue.new(1)
+    assert_equal 1, q.max
+    assert_raise(ArgumentError) { SizedQueue.new(0) }
+    assert_raise(ArgumentError) { SizedQueue.new(-1) }
+  end
+
+  def test_sized_queue_assign_max
+    q = SizedQueue.new(2)
+    assert_equal(2, q.max)
+    q.max = 1
+    assert_equal(1, q.max)
+    assert_raise(ArgumentError) { q.max = 0 }
+    assert_equal(1, q.max)
+    assert_raise(ArgumentError) { q.max = -1 }
+    assert_equal(1, q.max)
+  end
 end