def test_addLineAtEnd(self):
"""
Verify that, by default, a line added to a history object is added
after any existing lines.
"""
s1 = "hello"
s2 = "world"
h = History([s1])
h.addLine(s2)
self.assertEqual(h.allLines(), [s1, s2])
def test_resetPosition(self):
"""
Verify that the position in the history object can be set to the end
using the C{resetPosition} method.
"""
s = "hello"
h = History()
h.addLine(s)
h.previousLine()
h.resetPosition()
self.assertEqual(h.nextLine(), "")
def test_addLineInMiddle(self):
"""
Verify that even if the history object is not positioned at the end,
C{addLine} adds the line to the end.
"""
s1 = "hello"
s2 = "world"
s3 = "goodbye"
h = History([s1, s2])
h.previousLine()
h.addLine(s3)
self.assertEqual(h.allLines(), [s1, s2, s3])