def problem3(self, s):
"""Test the Backpack class's magic methods. 10 points."""
# Test Backpack.__eq__() in False case (3 points).
b1 = s.Backpack("Name1", "Color", 10)
b2 = s.Backpack("Name2", "Color", 10)
points = self._evalTest(not b1==b2,
"Backpack.__eq__() failed (different names)")
b1 = s.Backpack("Name", "Color1", 10)
b2 = s.Backpack("Name", "Color2", 10)
points += self._evalTest(not b1==b2,
"Backpack.__eq__() failed (different colors)")
b1 = s.Backpack("Name", "Color", 10)
b2 = s.Backpack("Name", "Color", 10)
for item in [1, 2, 3]:
b1.put(item); b2.put(item)
b2.put(4)
points += self._evalTest(not b1==b2,
"Backpack.__eq__() failed (different number of contents)")
# Test Backpack.__eq__() in True case (2 points).
b1 = s.Backpack("Name", "Color", 100)
b2 = s.Backpack("Name", "Color", 10)
points += self._evalTest(b1==b2,
"Backpack.__eq__() failed (equal objects)")
for item in ["apple", "banana", "carrot"]:
b1.put(item); b2.put(item)
points += self._evalTest(b1==b2,
"Backpack.__eq__() failed (equal objects)")
# Test Backpack.__str__() on an empty Backpack (2 points).
b1 = Backpack("Student", "green", 4)
b2 = s.Backpack("Student", "green", 4)
print("\nCorrect output:"); print(b1)
print("\nStudent output:"); print(b2)
points += self._grade(2,
"Incorrect Backpack.__str__():\n{}\n".format(b2))
# Test Backpack.__str__() on a Backpack with contents (3 points).
b1 = Backpack("Master Yoda", "tan", 7)
b2 = s.Backpack("Master Yoda", "tan", 7)
for item in ["Crystal", "Lightsaber", "Commlink", "Banana"]:
b1.put(item); b2.put(item)
print("\nCorrect output:"); print(b1)
print("\nStudent output:"); print(b2)
points += self._grade(3,
"Incorrect Backpack.__str__():\n{}\n".format(b2))
return points
def problem1(self, s):
"""Test the Backpack class. 10 points."""
# Test the constructor (2 points)
b1 = Backpack("Teacher", "silver")
b2 = s.Backpack("Student", "green")
points = 2
# Test put() (6 points).
for item in range(5):
b1.put(item); b2.put(item)
points += self._eqTest(b1.contents, b2.contents,
"Backpack.put() failed to update Backpack.contents correctly")
print("\nCorrect output:\t"),; b1.put(5)
print("Student output:\t"),; b2.put(5)
points += self._grade(1, 'Backpack.put() failed to print "No Room!"')
points += self._eqTest(b1.contents, b2.contents,
"Backpack.put() failed to update Backpack.contents correctly")
b1 = Backpack("Teacher", "silver", 1)
b2 = s.Backpack("Student", "green", 1)
b1.put(100); b2.put(100)
print("\nCorrect output:\t"),; b1.put(200)
print("Student output:\t"),; b2.put(200)
points += self._grade(1, 'Backpack.put() failed to print "No Room!"')
points += 2*self._eqTest(b1.contents, b2.contents,
"Backpack.put() failed to update Backpack.contents correctly")
# Test dump() (2 points)
b1.dump(); b2.dump()
points += 2*self._eqTest(b1.contents, b2.contents,
"Backpack.dump() failed to empty contents")
return points
