def test_createWithLines(self):
"""
Verify that a history object can be created with an initial set of
lines.
"""
h = History(["a", "b"])
self.assertEqual(h.allLines(), ["a", "b"])
def test_allLinesWhenEmpty(self):
"""
Verify that retrieving all lines at once from an empty history object
returns an empty list.
"""
h = History()
self.assertEqual(h.allLines(), [])
def test_addLineWhenEmpty(self):
"""
Verify that a line added to an empty history object results in that
line being included in the list returned by C{allLines}.
"""
s = "hello world"
h = History([s])
self.assertEqual(h.allLines(), [s])
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_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])
