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"""Test OXM-related implementations.""" |
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from unittest import TestCase |
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from pyof.foundation.exceptions import PackException, UnpackException |
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from pyof.v0x04.common.flow_match import ( |
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Match, MatchType, OxmClass, OxmOfbMatchField, OxmTLV) |
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class TestMatch(TestCase): |
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"""Test Match class.""" |
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tlv1 = OxmTLV(oxm_class=OxmClass.OFPXMC_OPENFLOW_BASIC, |
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oxm_field=OxmOfbMatchField.OFPXMT_OFB_IN_PHY_PORT, |
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oxm_hasmask=True, oxm_value=b'abc') |
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tlv2 = OxmTLV(oxm_class=OxmClass.OFPXMC_EXPERIMENTER, |
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oxm_field=OxmOfbMatchField.OFPXMT_OFB_METADATA, |
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oxm_hasmask=False, oxm_value=b'abcdef') |
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match = Match(match_type=MatchType.OFPMT_OXM, |
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oxm_match_fields=[tlv1, tlv2]) |
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def test_unpacked_pack(self): |
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"""Pack and then unpack the result and check for equality. |
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Use two TLVs to also test match-field list packing/unpacking. |
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""" |
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unpacked = Match() |
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unpacked.unpack(self.match.pack()) |
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self.assertEqual(self.match, unpacked) |
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def test_pack_other_instance(self): |
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"""Test packing another Match instance by using the value argument.""" |
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expected = self.match.pack() |
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valued_pack = Match().pack(self.match) |
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self.assertEqual(expected, valued_pack) |
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class TestOxmTLV(TestCase): |
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"""Test OXM TLV pack and unpack.""" |
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def setUp(self): |
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"""Instantiate an OXM TLV struct.""" |
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self.tlv = OxmTLV(oxm_class=OxmClass.OFPXMC_OPENFLOW_BASIC, |
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oxm_field=OxmOfbMatchField.OFPXMT_OFB_IN_PHY_PORT, |
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oxm_hasmask=False, oxm_value=b'') |
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def test_different_class_types(self): |
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"""Pack, unpack the result and assert the values are equal.""" |
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for oxm_class in (OxmClass.OFPXMC_OPENFLOW_BASIC, |
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OxmClass.OFPXMC_EXPERIMENTER): |
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self.tlv.oxm_class = oxm_class |
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unpacked = self._create_from_pack() |
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self.assertEqual(oxm_class, unpacked.oxm_class) |
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def test_different_fields(self): |
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"""Pack, unpack the result and assert the values are equal.""" |
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for oxm_field in (OxmOfbMatchField.OFPXMT_OFB_IN_PORT, |
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OxmOfbMatchField.OFPXMT_OFB_IPV6_EXTHDR): |
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self.tlv.oxm_field = oxm_field |
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unpacked = self._create_from_pack() |
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self.assertEqual(oxm_field, unpacked.oxm_field) |
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def test_hasmask_bit(self): |
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"""Pack, unpack the result and assert the values are equal.""" |
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for oxm_hasmask in True, False: |
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self.tlv.oxm_hasmask = oxm_hasmask |
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unpacked = self._create_from_pack() |
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self.assertEqual(oxm_hasmask, unpacked.oxm_hasmask) |
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def test_different_values(self): |
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"""Pack, unpack the result and assert the values are equal.""" |
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for oxm_value in b'', b'abc': |
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self.tlv.oxm_value = oxm_value |
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unpacked = self._create_from_pack() |
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self.assertEqual(oxm_value, unpacked.oxm_value) |
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def _create_from_pack(self): |
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"""Return a new instance by unpacking self.tlv.pack().""" |
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unpacked = OxmTLV() |
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unpacked.unpack(self.tlv.pack()) |
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return unpacked |
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def test_pack_overflowed_field(self): |
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"""Raise PackException if field is bigger than 7 bit.""" |
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self.tlv.oxm_class = OxmClass.OFPXMC_EXPERIMENTER |
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self.tlv.oxm_field = 2**7 |
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with self.assertRaises(PackException): |
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self.tlv.pack() |
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def test_pack_invalid_field(self): |
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"""Raise PackException if field is invalid for a class. |
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Example: field 42 is invalid for oxm_class OFPXMC_OPENFLOW_BASIC. |
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""" |
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self.tlv.oxm_class = OxmClass.OFPXMC_OPENFLOW_BASIC |
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self.tlv.oxm_field = 42 |
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with self.assertRaises(PackException): |
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self.tlv.pack() |
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def test_unpack_invalid_field(self): |
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"""Raise UnpackException if field is invalid for a class. |
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Example: field 42 is invalid for oxm_class OFPXMC_OPENFLOW_BASIC. |
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""" |
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field42 = b'\x80\x00T\x00' |
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tlv = OxmTLV() |
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with self.assertRaises(UnpackException): |
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tlv.unpack(field42) |
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def test_max_field_value(self): |
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"""Use all bits of oxm_field.""" |
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self.tlv.oxm_class = OxmClass.OFPXMC_EXPERIMENTER |
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self.tlv.oxm_field = 127 |
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unpacked = OxmTLV() |
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unpacked.unpack(self.tlv.pack()) |
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self.assertEqual(self.tlv, unpacked) |
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cemsbr /
python-openflow
