def METHOD_NAME(self):
    """Download files"""
    self.calibFile = "mock.tif"
    self.ctrlPt = {0: (300, 230),
                   1: (300, 212),
                   2: (300, 195),
                   3: (300, 177),
                   4: (300, 159),
                   5: (300, 140),
                   6: (300, 123),
                   7: (300, 105),
                   8: (300, 87)}
    self.tth = numpy.radians(numpy.arange(4, 13))
    self.wavelength = 1e-10
    self.ds = self.wavelength * 5e9 / numpy.sin(self.tth / 2)
    self.calibrant = Calibrant(dSpacing=self.ds)
    self.maxiter = 100
    self.tmp_dir = os.path.join(UtilsTest.tempdir, "peak_picking")
    self.logfile = os.path.join(self.tmp_dir, "testpeakPicking.log")
    self.nptfile = os.path.join(self.tmp_dir, "testpeakPicking.npt")
    # download files
    if not os.path.isdir(self.tmp_dir):
        os.makedirs(self.tmp_dir)
    self.img = UtilsTest.getimage(self.calibFile)
    self.pp = PeakPicker(self.img, calibrant=self.calibrant, wavelength=self.wavelength)
    if not os.path.isdir(self.tmp_dir):
        os.makedirs(self.tmp_dir)
    if os.path.isfile(self.logfile):
        os.unlink(self.logfile)
    if os.path.isfile(self.nptfile):
        os.unlink(self.nptfile)