# File gstreamer/tests/tc_element.rb, line 87
    def test_bin
        assert_instance_of(Gst::Bin, b = Gst::Bin.new("my bin"))
        b.test(self)
        # Test signals
        #b.signal_connect("element-added") { puts "element added!" }
        # Test container
        assert_equal(0, b.size)
        100.times { |i| b.add(Gst::ElementFactory.make("mad")) }
        assert_equal(b.size, 100)
        i = 0
        b.each_element { |e| assert_instance_of(Gst::Element, e); i += 1 }
        assert_equal(b.size, i)
        b.clear
        assert_equal(b.size, 0)
        a = Array.new
        100.times { a.push(Gst::ElementFactory.make("fakesrc")) }
        assert_equal(a.length, 100)
        b.add(*a)
        assert_equal(b.size, b.length)
        assert_equal(b.size, 100)
        assert_instance_of(Array, a = b.elements)
        assert_equal(a.length, 100)
        a.each { |e| assert_instance_of(Gst::Element, e) }
        b.remove(*a[0, 50])
        assert_equal(b.size, b.length)
        assert_equal(b.size, 50)
        b.remove_all
        assert_equal(b.size, b.length)
        assert_equal(b.size, 0)
        # Test unique auto-generated bins names
        a = Array.new
        10.times { a.push(Gst::Bin.new) }
        a.each { |e| assert_instance_of(Gst::Bin, e) }
        assert_nil a.collect { |e| e.name }.uniq! 
    end