def test_whitespaceDoesntDepleteErasers(self):
p = Pencil(length=40, pointDurability=1000, eraserDurability=5)
p.write("last on last night's schedule was immigration law")
p.erase(" was ")
self.assertTrue(
p.getText() == "last on last night's schedule immigration law")
p.erase("la")
self.assertTrue(
p.getText() == "last on last night's schedule immigration w")
def test_erasersWearOut(self):
p = Pencil(length=40, pointDurability=1000, eraserDurability=2)
p.write("last on last night's schedule was immigration law")
p.erase("la")
self.assertTrue(
p.getText() == "last on last night's schedule was immigration w")
p.erase("la")
self.assertTrue(
p.getText() == "last on last night's schedule was immigration w")
def test_erasingTextReplacesItsLastOccurrenceWithSpaces(self):
p = Pencil(length=40, pointDurability=1000, eraserDurability=200)
p.write("last on last night's schedule was immigration law")
p.erase("la")
self.assertTrue(
p.getText() == "last on last night's schedule was immigration w")
p.erase("la")
self.assertTrue(
p.getText() == "last on st night's schedule was immigration w")
def test_editingMarksCollisionsWithNonSpaceWithAt(self):
p = Pencil(length=40, pointDurability=1000, eraserDurability=200)
p.write("An apple a day keeps the doctor away")
p.erase("apple")
p.overwrite("artichoke")
self.assertTrue(p.getText() == "An artich@k@ay keeps the doctor away")
def test_editingOverwritesErasedText(self):
p = Pencil(length=40, pointDurability=1000, eraserDurability=200)
p.write("An apple a day keeps the doctor away")
p.erase("apple")
p.overwrite("onion")
self.assertTrue(p.getText() == "An onion a day keeps the doctor away")
def test_aPencilWithSufficientlyDurablePointCanWrite(self):
p = Pencil(length=40, pointDurability=1000, eraserDurability=200)
text = "Four score and seven years ago"
p.write(text)
self.assertTrue(p.getText() == text)
def test_textIsErasedFromTheRight(self):
p = Pencil(length=40, pointDurability=1000, eraserDurability=5)
p.write("a Kafkaesque bureaucracy")
p.erase("Kafkaesque")
self.assertTrue(p.getText() == "a Kafka bureaucracy")
def test_aSharpenedPencilCanWriteAgain(self):
p = Pencil(length=40, pointDurability=4, eraserDurability=200)
p.write("ambi")
p.sharpen()
p.write("dextrous")
self.assertTrue(p.getText() == "ambidext ")
def test_aPencilWritesBlanksAfterPointLosesDurability(self):
p = Pencil(length=40, pointDurability=4, eraserDurability=200)
p.write("ambidextrous")
self.assertTrue(p.getText() == "ambi ")