upstream/ipython Files · IPython/utils/tests/test_dir2.py

Prevent qtconsole frontend freeze on lots of output....

Prevent qtconsole frontend freeze on lots of output. The output from the kernel is now clipped to last `buffer_size` before displaying and a timer is used to flush the pending output text instead of attempting to display text on every stream output from kernel. The timer interval is adjusted based on actual time taken to append a screenful of text to widget. This throttles the widget repaints and avoids choking the Qt event loop leaving time to handle other Qt events. Test cases: In [1]: for i in xrange(1000000): print i In [2]: range(100000) Without this commit the first input causes the qtconsole frontend to freeze, not responding to `Ctrl+C`.

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      import nose.tools as nt

      from IPython.utils.dir2 import dir2

      class Base(object):

          x = 1

          z = 23

      def test_base():

          res = dir2(Base())

          assert ('x' in res)

          assert ('z' in res)

          assert ('y' not in res)

          assert ('__class__' in res)

          nt.assert_equal(res.count('x'), 1)

          nt.assert_equal(res.count('__class__'), 1)

      def test_SubClass():

          class SubClass(Base):

              y = 2

          res = dir2(SubClass())

          assert ('y' in res)

          nt.assert_equal(res.count('y'), 1)

          nt.assert_equal(res.count('x'), 1)

      def test_SubClass_with_trait_names_method():

          class SubClass(Base):

              y = 2

              def trait_names(self):

                  return ['t', 'umbrella']

          res = dir2(SubClass())

          assert('trait_names' in res)

          assert('umbrella' in res)

          nt.assert_equal(res[-6:], ['t', 'trait_names','umbrella', 'x','y','z'])

          nt.assert_equal(res.count('t'), 1)

      def test_SubClass_with_trait_names_attr():

          # usecase: trait_names is used in a class describing psychological classification

          class SubClass(Base):

              y = 2

              trait_names = 44

          res = dir2(SubClass())

          assert('trait_names' in res)

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				import nose.tools as nt
				from IPython.utils.dir2 import dir2


				class Base(object):
				x = 1
				z = 23


				def test_base():
				res = dir2(Base())
				assert ('x' in res)
				assert ('z' in res)
				assert ('y' not in res)
				assert ('__class__' in res)
				nt.assert_equal(res.count('x'), 1)
				nt.assert_equal(res.count('__class__'), 1)

				def test_SubClass():

				class SubClass(Base):
				y = 2

				res = dir2(SubClass())
				assert ('y' in res)
				nt.assert_equal(res.count('y'), 1)
				nt.assert_equal(res.count('x'), 1)


				def test_SubClass_with_trait_names_method():

				class SubClass(Base):
				y = 2
				def trait_names(self):
				return ['t', 'umbrella']

				res = dir2(SubClass())
				assert('trait_names' in res)
				assert('umbrella' in res)
				nt.assert_equal(res[-6:], ['t', 'trait_names','umbrella', 'x','y','z'])
				nt.assert_equal(res.count('t'), 1)


				def test_SubClass_with_trait_names_attr():
				# usecase: trait_names is used in a class describing psychological classification

				class SubClass(Base):
				y = 2
				trait_names = 44

				res = dir2(SubClass())
				assert('trait_names' in res)