def test_when_new_word_is_too_long_it_should_replace_characters_with_at_symbol(self):
pencil = Pencil()
pencil.write(self.paper, "An a day keeps the doctor away")
pencil.edit(self.paper, "artichoke")
self.assertEqual("An artich@k@ay keeps the doctor away", self.paper.read())
def test_editing_should_replace_erased_word_with_new_text(self):
pencil = Pencil()
pencil.write(self.paper, "An a day keeps the doctor away")
pencil.edit(self.paper, "onion")
self.assertEqual("An onion a day keeps the doctor away", self.paper.read())
def test_when_new_word_goes_beyond_end_of_paper_it_should_be_appended_to_the_end(self):
pencil = Pencil()
pencil.write(self.paper, "A short phrase")
pencil.erase(self.paper, "phrase")
pencil.edit(self.paper, "sentence")
self.assertEqual("A short sentence", self.paper.read())
def test_editing_replaces_text(initial_text, new_text, output):
paper = Paper(initial_text)
pencil = Pencil()
pencil.edit(paper, new_text)
assert paper.buffer == output
def test_edit_writes_spaces_when_out_of_lead():
pencil = Pencil(5)
sentence = 'An a day'
assert pencil.edit('artichoke', sentence, 3) == 'An artic ay'
def test_overwrites_chars_with_at_sign():
pencil = Pencil()
sentence = 'An a day keeps the doctor away'
assert pencil.edit('artichoke', sentence,
3) == 'An artich@k@ay keeps the doctor away'
def test_can_write_into_a_whitespace_gap():
pencil = Pencil()
sentence = 'An a day keeps the doctor away.'
assert pencil.edit('onion', sentence,
3) == 'An onion a day keeps the doctor away.'
