How to use the cdflib.cdfepoch.findepochrange function in cdflib

def test_findepochrange_cdfepoch(self):
        start_time = "2013-12-01T12:24:22.000"
        end_time = "2014-12-01T12:24:22.000"
        x = cdflib.cdfepoch.parse([start_time, end_time])
        time_array = np.arange(x[0], x[1], step=1000000)

        test_start = [2014, 8, 1, 8, 1, 54, 123]
        test_end = [2018, 1, 1, 1, 1, 1, 1]
        index = cdflib.cdfepoch.findepochrange(time_array, starttime=test_start, endtime=test_end)
        # Test that the test_start is less than the first index, but more than one less
        self.assertGreaterEqual(time_array[index[0]], cdflib.cdfepoch.compute(test_start))
        self.assertLessEqual(time_array[index[0]-1], cdflib.cdfepoch.compute(test_start))

        self.assertLessEqual(time_array[index[-1]], cdflib.cdfepoch.compute(test_end))
        return

def test_findepochrange_cdftt2000(self):
        start_time = "2004-03-01T12:24:22.351793238"
        end_time = "2004-03-01T12:28:22.351793238"
        x = cdflib.cdfepoch.parse([start_time, end_time])
        time_array = np.arange(x[0], x[1], step=1000000)

        test_start = [2004, 3, 1, 12, 25, 54, 123, 111, 98]
        test_end = [2004, 3, 1, 12, 26, 4, 123, 456, 789]
        index = cdflib.cdfepoch.findepochrange(time_array, starttime=test_start, endtime=test_end)
        # Test that the test_start is less than the first index, but more than one less
        self.assertGreaterEqual(time_array[index[0]], cdflib.cdfepoch.compute(test_start))
        self.assertLessEqual(time_array[index[0]-1], cdflib.cdfepoch.compute(test_start))

        self.assertLessEqual(time_array[index[-1]], cdflib.cdfepoch.compute(test_end))
        self.assertGreaterEqual(time_array[index[-1]+1], cdflib.cdfepoch.compute(test_end))
        return

def test_findepochrange_cdfepoch16(self):
        start_time = "1978-03-10T03:24:22.351793238462"
        end_time = "1978-06-13T01:28:22.338327950466"
        x = cdflib.cdfepoch.parse([start_time, end_time])
        first_int_step = int((x[1].real - x[0].real) / 1000)
        second_int_step = int((x[1].imag - x[0].imag) / 1000)
        time_array = []
        for i in range(0, 1000):
            time_array.append(x[0] + complex(first_int_step * i, second_int_step * i))

        test_start = [1978, 6, 10, 3, 24, 22, 351, 793, 238, 462]
        test_end = [1978, 6, 12, 23, 11, 1, 338, 341, 416, 466]
        index = cdflib.cdfepoch.findepochrange(time_array, starttime=test_start, endtime=test_end)

        # Test that the test_start is less than the first index, but more than one less
        self.assertGreaterEqual(time_array[index[0]].real, cdflib.cdfepoch.compute(test_start).real)
        self.assertLessEqual(time_array[index[0] - 1].real, cdflib.cdfepoch.compute(test_start).real)
        self.assertLessEqual(time_array[index[-1]].real, cdflib.cdfepoch.compute(test_end).real)
        self.assertGreaterEqual(time_array[index[-1] + 1].real, cdflib.cdfepoch.compute(test_end).real)
        return

def _findrangerecords(self, data_type, epochtimes, starttime, endtime):
        if (data_type == 31 or data_type == 32 or data_type == 33):
            #CDF_EPOCH or CDF_EPOCH16 or CDF_TIME_TT2000
            recs = cdflib.cdfepoch.findepochrange(epochtimes, starttime, endtime)
        else:
            print('Not a CDF epoch type...')
            return None
        return recs