Lib/test/test_readline.py

   1 """
   2 Very minimal unittests for parts of the readline module.
   3
   4 These tests were added to check that the libedit emulation on OSX and
   5 the "real" readline have the same interface for history manipulation. That's
   6 why the tests cover only a small subset of the interface.
   7 """
   8 import unittest
   9 from test.test_support import run_unittest, import_module
  10
  11 # Skip tests if there is no readline module
  12 readline = import_module('readline')
  13
  14 class TestHistoryManipulation (unittest.TestCase):
  15     def testHistoryUpdates(self):
  16         readline.clear_history()
  17
  18         readline.add_history("first line")
  19         readline.add_history("second line")
  20
  21         self.assertEqual(readline.get_history_item(0), None)
  22         self.assertEqual(readline.get_history_item(1), "first line")
  23         self.assertEqual(readline.get_history_item(2), "second line")
  24
  25         readline.replace_history_item(0, "replaced line")
  26         self.assertEqual(readline.get_history_item(0), None)
  27         self.assertEqual(readline.get_history_item(1), "replaced line")
  28         self.assertEqual(readline.get_history_item(2), "second line")
  29
  30         self.assertEqual(readline.get_current_history_length(), 2)
  31
  32         readline.remove_history_item(0)
  33         self.assertEqual(readline.get_history_item(0), None)
  34         self.assertEqual(readline.get_history_item(1), "second line")
  35
  36         self.assertEqual(readline.get_current_history_length(), 1)
  37
  38
  39 def test_main():
  40     run_unittest(TestHistoryManipulation)
  41
  42 if __name__ == "__main__":
  43     test_main()