| """ | 
 | Very minimal unittests for parts of the readline module. | 
 |  | 
 | These tests were added to check that the libedit emulation on OSX and | 
 | the "real" readline have the same interface for history manipulation. That's | 
 | why the tests cover only a small subset of the interface. | 
 | """ | 
 | import unittest | 
 | from test.test_support import run_unittest, import_module | 
 |  | 
 | # Skip tests if there is no readline module | 
 | readline = import_module('readline') | 
 |  | 
 | class TestHistoryManipulation (unittest.TestCase): | 
 |     def testHistoryUpdates(self): | 
 |         readline.clear_history() | 
 |  | 
 |         readline.add_history("first line") | 
 |         readline.add_history("second line") | 
 |  | 
 |         self.assertEqual(readline.get_history_item(0), None) | 
 |         self.assertEqual(readline.get_history_item(1), "first line") | 
 |         self.assertEqual(readline.get_history_item(2), "second line") | 
 |  | 
 |         readline.replace_history_item(0, "replaced line") | 
 |         self.assertEqual(readline.get_history_item(0), None) | 
 |         self.assertEqual(readline.get_history_item(1), "replaced line") | 
 |         self.assertEqual(readline.get_history_item(2), "second line") | 
 |  | 
 |         self.assertEqual(readline.get_current_history_length(), 2) | 
 |  | 
 |         readline.remove_history_item(0) | 
 |         self.assertEqual(readline.get_history_item(0), None) | 
 |         self.assertEqual(readline.get_history_item(1), "second line") | 
 |  | 
 |         self.assertEqual(readline.get_current_history_length(), 1) | 
 |  | 
 |  | 
 | def test_main(): | 
 |     run_unittest(TestHistoryManipulation) | 
 |  | 
 | if __name__ == "__main__": | 
 |     test_main() |