F......F..F...F.

======================================================================

FAIL: testCmp (tester.ProblemTests)

----------------------------------------------------------------------

Traceback (most recent call last):

  File ".../test.py", line 110, in testCmp

    self.assertTrue(Interval(7, 22) > Interval(8, 22))

AssertionError



======================================================================

FAIL: testIntersects (tester.ProblemTests)

----------------------------------------------------------------------

Traceback (most recent call last):

  File ".../test.py", line 73, in testIntersects

    self.assertTrue(Interval(2, 3).intersects(Interval(3, 4)))

AssertionError



======================================================================

FAIL: testLen (tester.ProblemTests)

----------------------------------------------------------------------

Traceback (most recent call last):

  File ".../test.py", line 99, in testLen

    self.assertEqual(7, len(Interval(-2, 4.1)))

AssertionError: 7 != 6



======================================================================

FAIL: testSum (tester.ProblemTests)

----------------------------------------------------------------------

Traceback (most recent call last):

  File ".../test.py", line 102, in testSum

    self.assertEqual(Interval(None, None), Interval(None, 11) + Interval(10, None))

AssertionError: Interval (None,None) != Interval (None,11.0)



----------------------------------------------------------------------

Ran 16 tests in 0.008s



FAILED (failures=4)