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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""Tests for the circular buffer for storing event objects."""
from __future__ import unicode_literals
import unittest
from plaso.lib import bufferlib
class CircularBufferTest(unittest.TestCase):
"""Tests for the circular buffer for storing event objects."""
def testBuffer(self):
"""Tests the circular buffer."""
items = list(range(1, 11))
circular_buffer = bufferlib.CircularBuffer(10)
self.assertEqual(len(circular_buffer), 10)
self.assertEqual(circular_buffer.size, 10)
current_item = circular_buffer.GetCurrent()
self.assertIsNone(current_item)
for item in items:
circular_buffer.Append(item)
current_item = circular_buffer.GetCurrent()
self.assertEqual(current_item, item)
self.assertEqual(circular_buffer.size, 10)
content = list(circular_buffer)
self.assertEqual(items, content)
circular_buffer.Append(11)
expected_items = [2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
items = list(circular_buffer.Flush())
self.assertEqual(items, expected_items)
self.assertIsNone(circular_buffer.GetCurrent())
items = list(range(1, 51))
for item in items:
circular_buffer.Append(item)
self.assertEqual(circular_buffer.GetCurrent(), item)
self.assertEqual(circular_buffer.size, 10)
expected_items = list(range(41, 51))
items = list(circular_buffer)
self.assertEqual(items, expected_items)
if __name__ == '__main__':
unittest.main()
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