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      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()
     44