text: import unittest
  
  from rx import operators as ops
  from rx.testing import TestScheduler, ReactiveTest
  
  on_next = ReactiveTest.on_next
  on_completed = ReactiveTest.on_completed
  on_error = ReactiveTest.on_error
  subscribe = ReactiveTest.subscribe
  subscribed = ReactiveTest.subscribed
  disposed = ReactiveTest.disposed
  created = ReactiveTest.created
  
  class RxException(Exception):
      pass
  
  
  # Helper function for raising exceptions within lambdas
  def _raise(ex):
      raise RxException(ex)
  
  
  def sequence_equal(arr1, arr2):
      if len(arr1) != len(arr2):
          return False
  
      for i in range(len(arr1)):
          if arr1[i] != arr2[i]:
              return False
      return True
  
  
  class TestBufferWithCount(unittest.TestCase):
      def test_buffer_with_count_basic(self):
          scheduler = TestScheduler()
          xs = scheduler.create_hot_observable(
              on_next(100, 1),
              on_next(210, 2),
              on_next(240, 3),
              on_next(280, 4),
              on_next(320, 5),
              on_next(350, 6),
              on_next(380, 7),
              on_next(420, 8),
              on_next(470, 9),
              on_completed(600))
  
          def create():
              return xs.pipe(ops.buffer_with_count(3, 2), ops.map(lambda x: str(x)))
  
          results = scheduler.start(create)
  
          assert results.messages == [
              on_next(280, str([2, 3, 4])),
              on_next(350, str([4, 5, 6])),
              on_next(420, str([6, 7, 8])),
              on_next(600, str([8, 9])),
              on_completed(600)]
          assert xs.subscriptions == [subscribe(200, 600)]
  
      def test_buffer_with_count_disposed(self):
          scheduler = TestScheduler()
          xs = scheduler.create_hot_observable(
              on_next(100, 1),
              on_next(210, 2),
              on_next(240, 3),
              on_next(280, 4),
              on_next(320, 5),
              on_next(350, 6),
              on_next(380, 7),
              on_next(420, 8),
              on_next(470, 9),
              on_completed(600))
  
          def create():
              return xs.pipe(ops.buffer_with_count(3, 2), ops.map(lambda x: str(x)))
  
          results = scheduler.start(create, disposed=370)
  
          assert results.messages == [
              on_next(280, str([2, 3, 4])),
              on_next(350, str([4, 5, 6]))]
          assert xs.subscriptions == [subscribe(200, 370)]
  
      def test_buffer_count_partial_window(self):
          scheduler = TestScheduler()
          xs = scheduler.create_hot_observable(on_next(150, 1), on_next(210, 2), on_next(220, 3), on_next(230, 4), on_next(240, 5), on_completed(250))
  
          def create():
              return xs.pipe(ops.buffer_with_count(5))
          results = scheduler.start(create).messages
          assert(2 == len(results))
          assert(sequence_equal(results[0].value.value, [2, 3, 4, 5]) and results[0].time == 250)
          assert(results[1].value.kind == 'C' and results[1].time == 250)
  
      def test_buffer_count_full_windows(self):
          scheduler = TestScheduler()
          xs = scheduler.create_hot_observable(on_next(150, 1), on_next(210, 2), on_next(220, 3), on_next(230, 4), on_next(240, 5), on_completed(250))
  
          def create():
              return xs.pipe(ops.buffer_with_count(2))
          results = scheduler.start(create).messages
          self.assertEqual(3, len(results))
          assert(sequence_equal(results[0].value.value, [2, 3]) and results[0].time == 220)
          assert(sequence_equal(results[1].value.value, [4, 5]) and results[1].time == 240)
          assert(results[2].value.kind == 'C' and results[2].time == 250)
  
      def test_buffer_count_full_and_partial_windows(self):
          scheduler = TestScheduler()
          xs = scheduler.create_hot_observable(on_next(150, 1), on_next(210, 2), on_next(220, 3), on_next(230, 4), on_next(240, 5), on_completed(250))
  
          def create():
              return xs.pipe(ops.buffer_with_count(3))
  
          results = scheduler.start(create).messages
          self.assertEqual(3, len(results))
          assert(sequence_equal(results[0].value.value, [2, 3, 4]) and results[0].time == 230)
          assert(sequence_equal(results[1].value.value, [5]) and results[1].time == 250)
          assert(results[2].value.kind == 'C' and results[2].time == 250)
  
      def test_buffer_count_error(self):
          scheduler = TestScheduler()
          xs = scheduler.create_hot_observable(on_next(150, 1), on_next(210, 2), on_next(220, 3), on_next(230, 4), on_next(240, 5), on_error(250, 'ex'))
  
          def create():
              return xs.pipe(ops.buffer_with_count(5))
  
          results = scheduler.start(create).messages
          self.assertEqual(1, len(results))
          assert(results[0].value.kind == 'E' and results[0].time == 250)
  
      def test_buffer_count_skip_less(self):
          scheduler = TestScheduler()
          xs = scheduler.create_hot_observable(on_next(150, 1), on_next(210, 2), on_next(220, 3), on_next(230, 4), on_next(240, 5), on_completed(250))
  
          def create():
              return xs.pipe(ops.buffer_with_count(3, 1))
  
          results = scheduler.start(create).messages
          self.assertEqual(5, len(results))
          assert(sequence_equal(results[0].value.value, [2, 3, 4]) and results[0].time == 230)
          assert(sequence_equal(results[1].value.value, [3, 4, 5]) and results[1].time == 240)
          assert(sequence_equal(results[2].value.value, [4, 5]) and results[2].time == 250)
          assert(sequence_equal(results[3].value.value, [5]) and results[3].time == 250)
          assert(results[4].value.kind == 'C' and results[4].time == 250)
  
      def test_buffer_count_skip_more(self):
          scheduler = TestScheduler()
          xs = scheduler.create_hot_observable(on_next(150, 1), on_next(210, 2), on_next(220, 3), on_next(230, 4), on_next(240, 5), on_completed(250))
  
          def create():
              return xs.pipe(ops.buffer_with_count(2, 3))
  
          results = scheduler.start(create).messages
          self.assertEqual(3, len(results))
          assert(sequence_equal(results[0].value.value, [2, 3]) and results[0].time == 220)
          assert(sequence_equal(results[1].value.value, [5]) and results[1].time == 250)
          assert(results[2].value.kind == 'C' and results[2].time == 250)
  