How to use the hl7apy.base_datatypes.TM function in hl7apy

def test_TM_default_format(self):
        time = datetime.strptime('010111.1110', '%H%M%S.%f')
        tm = TM(time)
        self.assertEqual(tm.to_er7(), '010111.1110')

def test_TM_custom_microsec_precision(self):
        time = datetime.strptime('011959.1234', '%H%M%S.%f')
        tm = TM(time, microsec_precision=1)
        self.assertEqual(tm.to_er7(), '011959.1')
        tm = TM(time, microsec_precision=2)
        self.assertEqual(tm.to_er7(), '011959.12')
        tm = TM(time, microsec_precision=3)
        self.assertEqual(tm.to_er7(), '011959.123')
        tm = TM(time, microsec_precision=4)
        self.assertEqual(tm.to_er7(), '011959.1234')

def test_TM(self):

        time = datetime.strptime('01', '%H')
        time1 = datetime.strptime('0101', '%H%M')
        time2 = datetime.strptime('010111', '%H%M%S')
        time3 = datetime.strptime('010111.1110', '%H%M%S.%f')
        tm = TM(time, out_format='%H')
        tm1 = TM(time1, out_format='%H%M')
        tm2 = TM(time2, out_format='%H%M%S')
        tm3 = TM(time3, out_format='%H%M%S.%f')
        self.assertEqual(tm.classname, 'TM')
        self.assertEqual(tm.to_er7(), '01')
        self.assertEqual(tm1.to_er7(), '0101')
        self.assertEqual(tm2.to_er7(), '010111')
        self.assertEqual(tm3.to_er7(), '010111.1110')

dtime = datetime.strptime('2013', '%Y')
        dtime1 = datetime.strptime('201307', '%Y%m')
        dtime2 = datetime.strptime('20130715', '%Y%m%d')
        dtime3 = datetime.strptime('01', '%H')
        dtime4 = datetime.strptime('0101', '%H%M')
        dtime5 = datetime.strptime('010111', '%H%M%S')
        dtime6 = datetime.strptime('010111.1110', '%H%M%S.%f')
        dtime7 = datetime.strptime('20130715010111.1110', '%Y%m%d%H%M%S.%f')

        dtm = DTM(dtime, out_format='%Y')
        dtm1 = DTM(dtime1, out_format='%Y%m')
        dtm2 = DTM(dtime2, out_format='%Y%m%d')
        dtm3 = TM(dtime3, out_format='%H')
        dtm4 = TM(dtime4, out_format='%H%M')
        dtm5 = TM(dtime5, out_format='%H%M%S')
        dtm6 = TM(dtime6, out_format='%H%M%S.%f')
        dtm7 = DTM(dtime7, out_format='%Y%m%d%H%M%S.%f')

        self.assertEqual(dtm.classname, 'DTM')
        self.assertEqual(dtm.to_er7(), '2013')
        self.assertEqual(dtm1.to_er7(), '201307')
        self.assertEqual(dtm2.to_er7(), '20130715')
        self.assertEqual(dtm3.to_er7(), '01')
        self.assertEqual(dtm4.to_er7(), '0101')
        self.assertEqual(dtm5.to_er7(), '010111')
        self.assertEqual(dtm6.to_er7(), '010111.1110')
        self.assertEqual(dtm7.to_er7(), '20130715010111.1110')

def test_TM(self):

        time = datetime.strptime('01', '%H')
        time1 = datetime.strptime('0101', '%H%M')
        time2 = datetime.strptime('010111', '%H%M%S')
        time3 = datetime.strptime('010111.1110', '%H%M%S.%f')
        tm = TM(time, out_format='%H')
        tm1 = TM(time1, out_format='%H%M')
        tm2 = TM(time2, out_format='%H%M%S')
        tm3 = TM(time3, out_format='%H%M%S.%f')
        self.assertEqual(tm.classname, 'TM')
        self.assertEqual(tm.to_er7(), '01')
        self.assertEqual(tm1.to_er7(), '0101')
        self.assertEqual(tm2.to_er7(), '010111')
        self.assertEqual(tm3.to_er7(), '010111.1110')

def test_TM(self):

        time = datetime.strptime('01', '%H')
        time1 = datetime.strptime('0101', '%H%M')
        time2 = datetime.strptime('010111', '%H%M%S')
        time3 = datetime.strptime('010111.1110', '%H%M%S.%f')
        tm = TM(time, out_format='%H')
        tm1 = TM(time1, out_format='%H%M')
        tm2 = TM(time2, out_format='%H%M%S')
        tm3 = TM(time3, out_format='%H%M%S.%f')
        self.assertEqual(tm.classname, 'TM')
        self.assertEqual(tm.to_er7(), '01')
        self.assertEqual(tm1.to_er7(), '0101')
        self.assertEqual(tm2.to_er7(), '010111')
        self.assertEqual(tm3.to_er7(), '010111.1110')

def test_TM_offset(self):
        time = datetime.strptime('0101', '%H%M')
        time2 = datetime.strptime('010111.1110', '%H%M%S.%f')
        tm = TM(time, out_format='%H%M', offset='+0100')
        tm2 = TM(time2, out_format='%H%M%S.%f', offset='-0300')
        TM(time, offset='+0000')
        TM(time, offset='-0000')
        TM(time, offset='+1200')
        TM(time, offset='-1200')
        self.assertEqual(tm.offset, '+0100')
        self.assertEqual(tm2.offset, '-0300')
        self.assertEqual(tm.to_er7(), '0101+0100')  # check if a space is needed between time and offset, or not
        self.assertEqual(tm2.to_er7(), '010111.1110-0300')

def test_DTM(self):
        dtime = datetime.strptime('2013', '%Y')
        dtime1 = datetime.strptime('201307', '%Y%m')
        dtime2 = datetime.strptime('20130715', '%Y%m%d')
        dtime3 = datetime.strptime('01', '%H')
        dtime4 = datetime.strptime('0101', '%H%M')
        dtime5 = datetime.strptime('010111', '%H%M%S')
        dtime6 = datetime.strptime('010111.1110', '%H%M%S.%f')
        dtime7 = datetime.strptime('20130715010111.1110', '%Y%m%d%H%M%S.%f')

        dtm = DTM(dtime, out_format='%Y')
        dtm1 = DTM(dtime1, out_format='%Y%m')
        dtm2 = DTM(dtime2, out_format='%Y%m%d')
        dtm3 = TM(dtime3, out_format='%H')
        dtm4 = TM(dtime4, out_format='%H%M')
        dtm5 = TM(dtime5, out_format='%H%M%S')
        dtm6 = TM(dtime6, out_format='%H%M%S.%f')
        dtm7 = DTM(dtime7, out_format='%Y%m%d%H%M%S.%f')

        self.assertEqual(dtm.classname, 'DTM')
        self.assertEqual(dtm.to_er7(), '2013')
        self.assertEqual(dtm1.to_er7(), '201307')
        self.assertEqual(dtm2.to_er7(), '20130715')
        self.assertEqual(dtm3.to_er7(), '01')
        self.assertEqual(dtm4.to_er7(), '0101')
        self.assertEqual(dtm5.to_er7(), '010111')
        self.assertEqual(dtm6.to_er7(), '010111.1110')
        self.assertEqual(dtm7.to_er7(), '20130715010111.1110')

raise InvalidDateOffset(offset)

        if offset and offset[0] not in ('+', '-'):
            raise InvalidDateOffset(offset)

        self.offset = offset

    def to_er7(self, encoding_chars=None):
        date_value = super(TM, self).to_er7()
        if self.format.find('%f') != -1:
            index = 6 - self.microsec_precision
            date_value = date_value[:-index]
        return '{0}{1}'.format(date_value, self.offset)


class DTM(TM):
    """
    Class for DTM base datatype. It extends TM and it represents classes DT and DTM combined.
    Thus it represents year, month, day, hours, minutes, seconds and microseconds.
    Parameters are the same of the superclass.

    The :attr:`allowed_formats` tuple is
    ``('%Y', '%Y%m', '%Y%m%d', '%Y%m%d%H', '%Y%m%d%H%M', '%Y%m%d%H%M%S', '%Y%m%d%H%M%S.%f')``
    """

    allowed_formats = ('%Y', '%Y%m', '%Y%m%d', '%Y%m%d%H', '%Y%m%d%H%M',
                       '%Y%m%d%H%M%S', '%Y%m%d%H%M%S.%f')

    def __init__(self, value=None, out_format='%Y%m%d%H%M%S.%f', offset='', microsec_precision=4):
        super(DTM, self).__init__(value, out_format, offset, microsec_precision)

def to_er7(self, encoding_chars=None):
        date_value = super(TM, self).to_er7()
        if self.format.find('%f') != -1:
            index = 6 - self.microsec_precision
            date_value = date_value[:-index]
        return '{0}{1}'.format(date_value, self.offset)