def testNormalMatrix(self):
matrix = [[1, 2, 3, 4],
[5, 6, 7, 8],
[9,10,11,12]]
self.assertEqual('1, 2, 3, 4, 8, 12, 11, 10, 9, 5, 6, 7', spiralPrinter(matrix))
def testSingleElement(self):
matrix = [[1]]
self.assertEqual('1', spiralPrinter(matrix))
def testEmptyMatrix(self):
self.assertEqual('', spiralPrinter([[]]))
def testNotConsistentMatrix(self):
matrix = [[1, 2, 3, 4],
[5, 6, 7, 8],
[9,10,11,12]]
self.assertRaises(Exception, spiralPrinter(matrix))
