def setUp(self):

self._line = "this is my test string"

def tearDown(self):

pass

def test_left_arrow_at_zero(self):

pos = 0

expected = (pos, self._line)

result = left_arrow(pos, self._line)

self.assertEquals(expected, result)

def test_left_arrow_at_non_zero(self):

for i in range(1, len(self._line)):

expected = (i-1, self._line)

result = left_arrow(i, self._line)

self.assertEqual(expected, result)

def test_right_arrow_at_end(self):

pos = len(self._line)

expected = (pos, self._line)

result = right_arrow(pos, self._line)

self.assertEquals(expected, result)

def test_right_arrow_at_non_end(self):

for i in range(len(self._line) - 1):

expected = (i + 1, self._line)

result = right_arrow(i, self._line)

self.assertEquals(expected, result)

def test_beginning_of_line(self):

expected = (0, self._line)

for i in range(len(self._line)):

result = beginning_of_line(i, self._line)

self.assertEquals(expected, result)

def test_end_of_line(self):

expected = (len(self._line), self._line)

for i in range(len(self._line)):

result = end_of_line(i, self._line)

self.assertEquals(expected, result)

def test_forward_word(self):

line = "going from here to_here"

start_pos = 11

next_word_pos = 15

expected = (next_word_pos, line)

result = forward_word(start_pos, line)

self.assertEquals(expected, result)

start_pos = 15

next_word_pos = 23

expected = (next_word_pos, line)

result = forward_word(start_pos, line)

self.assertEquals(expected, result)

def test_forward_word_tabs(self):

line = "going from here to_here"

start_pos = 11

next_word_pos = 15

expected = (next_word_pos, line)

result = forward_word(start_pos, line)

self.assertEquals(expected, result)

start_pos = 15

next_word_pos = 28

expected = (next_word_pos, line)

result = forward_word(start_pos, line)

self.assertEquals(expected, result)

def test_forward_word_end(self):

line = "going from here to_here"

start_pos = 16

next_word_pos = 23

expected = (next_word_pos, line)

result = forward_word(start_pos, line)

self.assertEquals(expected, result)

start_pos = 22

next_word_pos = 23

expected = (next_word_pos, line)

result = forward_word(start_pos, line)

self.assertEquals(expected, result)

start_pos = 23

next_word_pos = 23

expected = (next_word_pos, line)

result = forward_word(start_pos, line)

self.assertEquals(expected, result)

def test_forward_word_empty(self):

line = ""

start_pos = 0

next_word_pos = 0

expected = (next_word_pos, line)

result = forward_word(start_pos, line)

self.assertEquals(expected, result)

def test_back_word(self):

line = "going to here from_here"

start_pos = 14

prev_word_pos = 9

self.assertEquals(line[start_pos], 'f')

self.assertEquals(line[prev_word_pos], 'h')

expected = (prev_word_pos, line)

result = back_word(start_pos, line)

self.assertEquals(expected, result)

def test_last_word_pos(self):

line = "a word"

expected = 2

result = last_word_pos(line)

self.assertEquals(expected, result)

def test_last_word_pos_single_word(self):

line = "word"

expected = 0

result = last_word_pos(line)

self.assertEquals(expected, result)

def test_delete(self):

line = "deletion line"

pos = 3

expected = (3, "deltion line")

result = delete(pos, line)

self.assertEquals(expected, result)

def test_delete_from_cursor_back(self):

line = "everything before this will be deleted"

expected = (0, "this will be deleted")

result = delete_from_cursor_back(line.find("this"), line)

self.assertEquals(expected, result)

def test_delete_from_cursor_forward(self):

line = "everything after this will be deleted"

pos = line.find("this")

expected = (pos, "everything after ")

result = delete_from_cursor_forward(line.find("this"), line)[:-1]

self.assertEquals(expected, result)

self.assertEquals(delete_from_cursor_forward(0, ''), (0, '', ''))

def test_delete_rest_of_word(self):

self.try_stages_kill([

'z|s;df asdf d s;a;a',

'z|;df asdf d s;a;a',

'z| asdf d s;a;a',

'z| d s;a;a',

'z| s;a;a',

'z|;a;a',

'z|;a',

'z|',

'z|'],

delete_rest_of_word)

def test_delete_word_to_cursor(self):

self.try_stages_kill([

' a;d sdf ;a;s;d; fjksald|a',

' a;d sdf ;a;s;d; |a',

' a;d sdf |a',

' a;d |a',

' |a',

'|a',

'|a'],

delete_word_to_cursor)

def test_yank_prev_killed_text(self):

pass

def test_yank_prev_prev_killed_text(self):

pass

def try_stages(self, strings, func):

if not all('|' in s for s in strings):

raise ValueError("Need to use '|' to specify cursor")

stages = [(s.index('|'), s.replace('|', '')) for s in strings]

for (initial_pos, initial), (final_pos, final) in zip(stages[:-1],

stages[1:]):

self.assertEquals(func(initial_pos, initial), (final_pos, final))

def try_stages_kill(self, strings, func):

if not all('|' in s for s in strings):

raise ValueError("Need to use '|' to specify cursor")

stages = [(s.index('|'), s.replace('|', '')) for s in strings]

for (initial_pos, initial), (final_pos, final) in zip(stages[:-1],

stages[1:]):

self.assertEquals(func(initial_pos, initial)[:-1],

(final_pos, final))

def test_transpose_character_before_cursor(self):

self.try_stages(["as|df asdf",

"ads|f asdf",

"adfs| asdf",

"adf s|asdf",

"adf as|sdf"], transpose_character_before_cursor)

def test_transpose_empty_line(self):

self.assertEquals(transpose_character_before_cursor(0, ''),

(0,''))

def test_transpose_first_character(self):

self.assertEquals(transpose_character_before_cursor(0, 'a'),

(0, 'a'))

self.assertEquals(transpose_character_before_cursor(0, 'as'),

(0, 'as'))

def test_transpose_end_of_line(self):

self.assertEquals(transpose_character_before_cursor(1, 'a'),

(1, 'a'))

self.assertEquals(transpose_character_before_cursor(2, 'as'),

(2, 'sa'))

def test_transpose_word_before_cursor(self):

pass

def test_backspace(self):

self.assertEquals(backspace(2, 'as'), (1, 'a'))

self.assertEquals(backspace(3, 'as '), (2, 'as'))

def test_delete_word_from_cursor_back(self):

self.try_stages_kill([

"asd;fljk asd;lfjas;dlkfj asdlk jasdf;ljk|",

"asd;fljk asd;lfjas;dlkfj asdlk jasdf;|",

"asd;fljk asd;lfjas;dlkfj asdlk |",

"asd;fljk asd;lfjas;dlkfj |",

"asd;fljk asd;lfjas;|",

"asd;fljk asd;|",

"asd;fljk |",

"asd;|",

"|",

"|"],

def setUp(self):

self.edits = UnconfiguredEdits()

def test_seq(self):

f = lambda cursor_offset, line: ('hi', 2)

self.edits.add('a', f)

self.assertIn('a', self.edits)

self.assertEqual(self.edits['a'], f)

self.assertEqual(self.edits.call('a', cursor_offset=3, line='hello'),

('hi', 2))

with self.assertRaises(KeyError):

self.edits['b']

with self.assertRaises(KeyError):

self.edits.call('b')

def test_functions_with_bad_signatures(self):

f = lambda something: (1, 2)

with self.assertRaises(TypeError):

self.edits.add('a', f)

g = lambda cursor_offset, line, something, something_else: (1, 2)

with self.assertRaises(TypeError):

self.edits.add('a', g)

def test_functions_with_bad_return_values(self):

f = lambda cursor_offset, line: ('hi',)

with self.assertRaises(ValueError):

self.edits.add('a', f)

g = lambda cursor_offset, line: ('hi', 1, 2, 3)

with self.assertRaises(ValueError):

self.edits.add('b', g)

def test_config(self):

f = lambda cursor_offset, line: ('hi', 2)

g = lambda cursor_offset, line: ('hey', 3)

self.edits.add_config_attr('att', f)

self.assertNotIn('att', self.edits)

class config(object):

att = 'c'

key_dispatch = {'c': 'c'}

configured_edits = self.edits.mapping_with_config(config, key_dispatch)

self.assertTrue(configured_edits.__contains__, 'c')

self.assertNotIn('c', self.edits)

with self.assertRaises(NotImplementedError):

configured_edits.add_config_attr('att2', g)

with self.assertRaises(NotImplementedError):

configured_edits.add('d', g)

self.assertEqual(configured_edits.call('c', cursor_offset=5,

line='asfd'),