.F.....F..F...E.

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

ERROR: testSum (tester.ProblemTests)

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

Traceback (most recent call last):

  File ".../test.py", line 103, in testSum

    self.assertEqual(Interval(6, None), Interval(6, 18) + Interval(18, None))

  File ".../fn43959/2007-04-04 14:10:13/user.py", line 246, in __add__

    if not self.intersects( interval ): raise ValueError

ValueError



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

FAIL: testContains (tester.ProblemTests)

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

Traceback (most recent call last):

  File ".../test.py", line 85, in testContains

    self.assertFalse(Interval(None, -8).contains(Interval(-8, None)))

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 96, in testLen

    self.assertEqual(0, len(Interval(-22, -22)))

AssertionError: 0 != 44



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

Ran 16 tests in 0.008s



FAILED (failures=3, errors=1)