import unittest
from commands import getstatusoutput
from numpy import array

class aubio_unit_template(unittest.TestCase):
  """ a class derivated from unittest.TestCase """
  
  def assertCloseEnough(self, first, second, places=5, msg=None):
    """Fail if the two objects are unequal as determined by their
       *relative* difference rounded to the given number of decimal places
       (default 7) and comparing to zero.
    """
    if round(first, places) == 0:
      if round(second-first, places) != 0:
        raise self.failureException, \
              (msg or '%r != %r within %r places' % (first, second, places))
    else:
      if round((second-first)/first, places) != 0:
        raise self.failureException, \
              (msg or '%r != %r within %r places' % (first, second, places))

class program_test_case(unittest.TestCase):

  filename = "/dev/null"
  progname = "UNDEFINED"
  command = ""
  options = ""

  def getOutput(self, expected_status = 0):
    self.command = self.progname + ' -i ' + self.filename + self.command
    self.command += self.options
    [self.status, self.output] = getstatusoutput(self.command)
    if expected_status != -1:
      assert self.status == expected_status, \
        "expected status was %s, got %s\nOutput was:\n%s" % \
        (expected_status, self.status, self.output)

def array_from_text_file(filename, dtype = 'float'):
  return array([line.split() for line in open(filename).readlines()], 
      dtype = dtype)