def testValidSubRange():
subRange = "100-200"
actualResult = question._isSubRange(subRange)
assert actualResult[0]
assert actualResult[1] is None
def testInvalidStartSubRange():
subRange = "s100-200"
actualResult = question._isSubRange(subRange)
expectMessage = "Invalid subRange start: s100"
assert not actualResult[0]
assert expectMessage == actualResult[1]
def testInvalidEndSubRange():
subRange = "100-s200"
actualResult = question._isSubRange(subRange)
expectMessage = "Invalid subRange end: s200"
assert not actualResult[0]
assert expectMessage == actualResult[1]
def testInvalidSubRange():
subRange = "100, 200"
actualResult = question._isSubRange(subRange)
expectMessage = "Invalid subRange: {}".format(subRange)
assert not actualResult[0]
assert expectMessage == actualResult[1]
