# testClasses.py
# ————–
# Licensing Information: You are free to use or extend these projects for
# educational purposes provided that (1) you do not distribute or publish
# solutions, (2) you retain this notice, and (3) you provide clear
# attribution to UC Berkeley, including a link to http://ai.berkeley.edu.
#
# Attribution Information: The Pacman AI projects were developed at UC Berkeley.
# The core projects and autograders were primarily created by John DeNero
# (denero@cs.berkeley.edu) and Dan Klein (klein@cs.berkeley.edu).
# Student side autograding was added by Brad Miller, Nick Hay, and
# Pieter Abbeel (pabbeel@cs.berkeley.edu).
# import modules from python standard library
import inspect
import re
import sys
# Class which models a question in a project. Note that questions have a
# maximum number of points they are worth, and are composed of a series of
# test cases
class Question(object):
def raiseNotDefined(self):
print(‘Method not implemented: %s’ % inspect.stack()[1][3])
sys.exit(1)
def __init__(self, questionDict, display):
self.maxPoints = int(questionDict[‘max_points’])
self.testCases = []
self.display = display
def getDisplay(self):
return self.display
def getMaxPoints(self):
return self.maxPoints
# Note that ‘thunk’ must be a function which accepts a single argument,
# namely a ‘grading’ object
def addTestCase(self, testCase, thunk):
self.testCases.append((testCase, thunk))
def execute(self, grades):
self.raiseNotDefined()
# Question in which all test cases must be passed in order to receive credit
class PassAllTestsQuestion(Question):
def execute(self, grades):
# TODO: is this the right way to use grades? The autograder doesn’t seem to use it.
testsFailed = False
grades.assignZeroCredit()
for _, f in self.testCases:
if not f(grades):
testsFailed = True
if testsFailed:
grades.fail(“Tests failed.”)
else:
grades.assignFullCredit()
# Question in which predict credit is given for test cases with a “points” property.
# All other tests are mandatory and must be passed.
class HackedPartialCreditQuestion(Question):
def execute(self, grades):
# TODO: is this the right way to use grades? The autograder doesn’t seem to use it.
grades.assignZeroCredit()
points = 0
passed = True
for testCase, f in self.testCases:
testResult = f(grades)
if “points” in testCase.testDict:
if testResult: points += float(testCase.testDict[“points”])
else:
passed = passed and testResult
## FIXME: Below terrible hack to match q3’s logic
if int(points) == self.maxPoints and not passed:
grades.assignZeroCredit()
else:
grades.addPoints(int(points))
class Q6PartialCreditQuestion(Question):
“””Fails any test which returns False, otherwise doesn’t effect the grades object.
Partial credit tests will add the required points.”””
def execute(self, grades):
grades.assignZeroCredit()
results = []
for _, f in self.testCases:
results.append(f(grades))
if False in results:
grades.assignZeroCredit()
class PartialCreditQuestion(Question):
“””Fails any test which returns False, otherwise doesn’t effect the grades object.
Partial credit tests will add the required points.”””
def execute(self, grades):
grades.assignZeroCredit()
for _, f in self.testCases:
if not f(grades):
grades.assignZeroCredit()
grades.fail(“Tests failed.”)
return False
class NumberPassedQuestion(Question):
“””Grade is the number of test cases passed.”””
def execute(self, grades):
grades.addPoints([f(grades) for _, f in self.testCases].count(True))
# Template modeling a generic test case
class TestCase(object):
def raiseNotDefined(self):
print(‘Method not implemented: %s’ % inspect.stack()[1][3])
sys.exit(1)
def getPath(self):
return self.path
def __init__(self, question, testDict):
self.question = question
self.testDict = testDict
self.path = testDict[‘path’]
self.messages = []
def __str__(self):
self.raiseNotDefined()
def execute(self, grades, moduleDict, solutionDict):
self.raiseNotDefined()
def writeSolution(self, moduleDict, filePath):
self.raiseNotDefined()
return True
# Tests should call the following messages for grading
# to ensure a uniform format for test output.
#
# TODO: this is hairy, but we need to fix grading.py’s interface
# to get a nice hierarchical project – question – test structure,
# then these should be moved into Question proper.
def testPass(self, grades):
grades.addMessage(‘PASS: %s’ % (self.path,))
for line in self.messages:
grades.addMessage(‘ %s’ % (line,))
return True
def testFail(self, grades):
grades.addMessage(‘FAIL: %s’ % (self.path,))
for line in self.messages:
grades.addMessage(‘ %s’ % (line,))
return False
# This should really be question level?
#
def testPartial(self, grades, points, maxPoints):
grades.addPoints(points)
extraCredit = max(0, points – maxPoints)
regularCredit = points – extraCredit
grades.addMessage(‘%s: %s (%s of %s points)’ % (“PASS” if points >= maxPoints else “FAIL”, self.path, regularCredit, maxPoints))
if extraCredit > 0:
grades.addMessage(‘EXTRA CREDIT: %s points’ % (extraCredit,))
for line in self.messages:
grades.addMessage(‘ %s’ % (line,))
return True
def addMessage(self, message):
self.messages.extend(message.split(‘\n’))