test dir renamed into tests

1 files changed, 817 insertions, 0 deletions

diff --git a/tests/codec/ber/test_decoder.py b/tests/codec/ber/test_decoder.py
new file mode 100644
index 0000000..c1852c4
--- /dev/null
+++ b/tests/codec/ber/test_decoder.py
@@ -0,0 +1,817 @@
+#
+# This file is part of pyasn1 software.
+#
+# Copyright (c) 2005-2017, Ilya Etingof <etingof@gmail.com>
+# License: http://pyasn1.sf.net/license.html
+#
+import sys
+try:
+    import unittest2 as unittest
+except ImportError:
+    import unittest
+
+from pyasn1.type import tag, namedtype, univ, char
+from pyasn1.codec.ber import decoder, eoo
+from pyasn1.compat.octets import ints2octs, str2octs, null
+from pyasn1.error import PyAsn1Error
+
+
+class BadAsn1SpecTestCase(unittest.TestCase):
+    def testBadSpec(self):
+        try:
+            decoder.decode(ints2octs((48, 2, 5, 0)), asn1Spec='not an Asn1Item')
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'Invalid asn1Spec accepted'
+
+
+class LargeTagDecoderTestCase(unittest.TestCase):
+    def testLargeTag(self):
+        assert decoder.decode(ints2octs((127, 141, 245, 182, 253, 47, 3, 2, 1, 1))) == (1, null)
+
+    def testLongTag(self):
+        assert decoder.decode(ints2octs((0x1f, 2, 1, 0)))[0].tagSet == univ.Integer.tagSet
+
+    def testTagsEquivalence(self):
+        integer = univ.Integer(2, tag.TagSet((), tag.Tag(tag.tagClassContext, 0, 0)))
+        assert decoder.decode(ints2octs((0x9f, 0x80, 0x00, 0x02, 0x01, 0x02)), asn1Spec=integer) == decoder.decode(
+            ints2octs((0x9f, 0x00, 0x02, 0x01, 0x02)), asn1Spec=integer)
+
+
+class DecoderCacheTestCase(unittest.TestCase):
+    def testCache(self):
+        assert decoder.decode(ints2octs((0x1f, 2, 1, 0))) == decoder.decode(ints2octs((0x1f, 2, 1, 0)))
+
+
+class IntegerDecoderTestCase(unittest.TestCase):
+    def testPosInt(self):
+        assert decoder.decode(ints2octs((2, 1, 12))) == (12, null)
+
+    def testNegInt(self):
+        assert decoder.decode(ints2octs((2, 1, 244))) == (-12, null)
+
+    def testZero(self):
+        assert decoder.decode(ints2octs((2, 0))) == (0, null)
+
+    def testZeroLong(self):
+        assert decoder.decode(ints2octs((2, 1, 0))) == (0, null)
+
+    def testMinusOne(self):
+        assert decoder.decode(ints2octs((2, 1, 255))) == (-1, null)
+
+    def testPosLong(self):
+        assert decoder.decode(
+            ints2octs((2, 9, 0, 255, 255, 255, 255, 255, 255, 255, 255))
+        ) == (0xffffffffffffffff, null)
+
+    def testNegLong(self):
+        assert decoder.decode(
+            ints2octs((2, 9, 255, 0, 0, 0, 0, 0, 0, 0, 1))
+        ) == (-0xffffffffffffffff, null)
+
+    def testSpec(self):
+        try:
+            decoder.decode(
+                ints2octs((2, 1, 12)), asn1Spec=univ.Null()
+            ) == (12, null)
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'wrong asn1Spec worked out'
+        assert decoder.decode(
+            ints2octs((2, 1, 12)), asn1Spec=univ.Integer()
+        ) == (12, null)
+
+    def testTagFormat(self):
+        try:
+            decoder.decode(ints2octs((34, 1, 12)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'wrong tagFormat worked out'
+
+
+class BooleanDecoderTestCase(unittest.TestCase):
+    def testTrue(self):
+        assert decoder.decode(ints2octs((1, 1, 1))) == (1, null)
+
+    def testTrueNeg(self):
+        assert decoder.decode(ints2octs((1, 1, 255))) == (1, null)
+
+    def testExtraTrue(self):
+        assert decoder.decode(ints2octs((1, 1, 1, 0, 120, 50, 50))) == (1, ints2octs((0, 120, 50, 50)))
+
+    def testFalse(self):
+        assert decoder.decode(ints2octs((1, 1, 0))) == (0, null)
+
+    def testTagFormat(self):
+        try:
+            decoder.decode(ints2octs((33, 1, 1)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'wrong tagFormat worked out'
+
+
+class BitStringDecoderTestCase(unittest.TestCase):
+    def testDefMode(self):
+        assert decoder.decode(
+            ints2octs((3, 3, 1, 169, 138))
+        ) == ((1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1), null)
+
+    def testIndefMode(self):
+        assert decoder.decode(
+            ints2octs((3, 3, 1, 169, 138))
+        ) == ((1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1), null)
+
+    def testDefModeChunked(self):
+        assert decoder.decode(
+            ints2octs((35, 8, 3, 2, 0, 169, 3, 2, 1, 138))
+        ) == ((1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1), null)
+
+    def testIndefModeChunked(self):
+        assert decoder.decode(
+            ints2octs((35, 128, 3, 2, 0, 169, 3, 2, 1, 138, 0, 0))
+        ) == ((1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1), null)
+
+    def testDefModeChunkedSubst(self):
+        assert decoder.decode(
+            ints2octs((35, 8, 3, 2, 0, 169, 3, 2, 1, 138)),
+            substrateFun=lambda a, b, c: (b, c)
+        ) == (ints2octs((3, 2, 0, 169, 3, 2, 1, 138)), 8)
+
+    def testIndefModeChunkedSubst(self):
+        assert decoder.decode(
+            ints2octs((35, 128, 3, 2, 0, 169, 3, 2, 1, 138, 0, 0)),
+            substrateFun=lambda a, b, c: (b, c)
+        ) == (ints2octs((3, 2, 0, 169, 3, 2, 1, 138, 0, 0)), -1)
+
+    def testTypeChecking(self):
+        try:
+            decoder.decode(ints2octs((35, 4, 2, 2, 42, 42)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'accepted mis-encoded bit-string constructed out of an integer'
+
+
+class OctetStringDecoderTestCase(unittest.TestCase):
+    def testDefMode(self):
+        assert decoder.decode(
+            ints2octs((4, 15, 81, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120))
+        ) == (str2octs('Quick brown fox'), null)
+
+    def testIndefMode(self):
+        assert decoder.decode(
+            ints2octs((36, 128, 4, 15, 81, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120, 0, 0))
+        ) == (str2octs('Quick brown fox'), null)
+
+    def testDefModeChunked(self):
+        assert decoder.decode(
+            ints2octs(
+                (36, 23, 4, 4, 81, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 4, 111, 119, 110, 32, 4, 3, 102, 111, 120))
+        ) == (str2octs('Quick brown fox'), null)
+
+    def testIndefModeChunked(self):
+        assert decoder.decode(
+            ints2octs((36, 128, 4, 4, 81, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 4, 111, 119, 110, 32, 4, 3, 102, 111,
+                       120, 0, 0))
+        ) == (str2octs('Quick brown fox'), null)
+
+    def testDefModeChunkedSubst(self):
+        assert decoder.decode(
+            ints2octs(
+                (36, 23, 4, 4, 81, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 4, 111, 119, 110, 32, 4, 3, 102, 111, 120)),
+            substrateFun=lambda a, b, c: (b, c)
+        ) == (ints2octs((4, 4, 81, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 4, 111, 119, 110, 32, 4, 3, 102, 111, 120)),
+              23)
+
+    def testIndefModeChunkedSubst(self):
+        assert decoder.decode(
+            ints2octs((36, 128, 4, 4, 81, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 4, 111, 119, 110, 32, 4, 3, 102, 111,
+                       120, 0, 0)),
+            substrateFun=lambda a, b, c: (b, c)
+        ) == (ints2octs(
+            (4, 4, 81, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 4, 111, 119, 110, 32, 4, 3, 102, 111, 120, 0, 0)), -1)
+
+
+class ExpTaggedOctetStringDecoderTestCase(unittest.TestCase):
+    def setUp(self):
+        self.o = univ.OctetString(
+            'Quick brown fox',
+            tagSet=univ.OctetString.tagSet.tagExplicitly(
+                tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 5)
+            ))
+
+    def testDefMode(self):
+        assert self.o.isSameTypeWith(decoder.decode(
+            ints2octs((101, 17, 4, 15, 81, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120))
+        )[0])
+
+    def testIndefMode(self):
+        v, s = decoder.decode(ints2octs((
+                                        101, 128, 36, 128, 4, 15, 81, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32,
+                                        102, 111, 120, 0, 0, 0, 0)))
+        assert self.o.isSameTypeWith(v)
+        assert not s
+
+    def testDefModeChunked(self):
+        v, s = decoder.decode(ints2octs((
+                                        101, 25, 36, 23, 4, 4, 81, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 4, 111, 119,
+                                        110, 32, 4, 3, 102, 111, 120)))
+        assert self.o.isSameTypeWith(v)
+        assert not s
+
+    def testIndefModeChunked(self):
+        v, s = decoder.decode(ints2octs((101, 128, 36, 128, 4, 4, 81, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 4, 111,
+                                         119, 110, 32, 4, 3, 102, 111, 120, 0, 0, 0, 0)))
+        assert self.o.isSameTypeWith(v)
+        assert not s
+
+    def testDefModeSubst(self):
+        assert decoder.decode(
+            ints2octs((101, 17, 4, 15, 81, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120)),
+            substrateFun=lambda a, b, c: (b, c)
+        ) == (ints2octs((4, 15, 81, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120)), 17)
+
+    def testIndefModeSubst(self):
+        assert decoder.decode(
+            ints2octs((
+                      101, 128, 36, 128, 4, 15, 81, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120, 0,
+                      0, 0, 0)),
+            substrateFun=lambda a, b, c: (b, c)
+        ) == (ints2octs(
+            (36, 128, 4, 15, 81, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120, 0, 0, 0, 0)), -1)
+
+
+class NullDecoderTestCase(unittest.TestCase):
+    def testNull(self):
+        assert decoder.decode(ints2octs((5, 0))) == (null, null)
+
+    def testTagFormat(self):
+        try:
+            decoder.decode(ints2octs((37, 0)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'wrong tagFormat worked out'
+
+
+# Useful analysis of OID encoding issues could be found here:
+# http://www.viathinksoft.de/~daniel-marschall/asn.1/oid_facts.html
+class ObjectIdentifierDecoderTestCase(unittest.TestCase):
+    def testOne(self):
+        assert decoder.decode(
+            ints2octs((6, 6, 43, 6, 0, 191, 255, 126))
+        ) == ((1, 3, 6, 0, 0xffffe), null)
+
+    def testEdge1(self):
+        assert decoder.decode(
+            ints2octs((6, 1, 39))
+        ) == ((0, 39), null)
+
+    def testEdge2(self):
+        assert decoder.decode(
+            ints2octs((6, 1, 79))
+        ) == ((1, 39), null)
+
+    def testEdge3(self):
+        assert decoder.decode(
+            ints2octs((6, 1, 120))
+        ) == ((2, 40), null)
+
+    def testEdge4(self):
+        assert decoder.decode(
+            ints2octs((6, 5, 0x90, 0x80, 0x80, 0x80, 0x4F))
+        ) == ((2, 0xffffffff), null)
+
+    def testEdge5(self):
+        assert decoder.decode(
+            ints2octs((6, 1, 0x7F))
+        ) == ((2, 47), null)
+
+    def testEdge6(self):
+        assert decoder.decode(
+            ints2octs((6, 2, 0x81, 0x00))
+        ) == ((2, 48), null)
+
+    def testEdge7(self):
+        assert decoder.decode(
+            ints2octs((6, 3, 0x81, 0x34, 0x03))
+        ) == ((2, 100, 3), null)
+
+    def testEdge8(self):
+        assert decoder.decode(
+            ints2octs((6, 2, 133, 0))
+        ) == ((2, 560), null)
+
+    def testEdge9(self):
+        assert decoder.decode(
+            ints2octs((6, 4, 0x88, 0x84, 0x87, 0x02))
+        ) == ((2, 16843570), null)
+
+    def testNonLeading0x80(self):
+        assert decoder.decode(
+            ints2octs((6, 5, 85, 4, 129, 128, 0)),
+        ) == ((2, 5, 4, 16384), null)
+
+    def testLeading0x80Case1(self):
+        try:
+            decoder.decode(
+                ints2octs((6, 5, 85, 4, 128, 129, 0))
+            )
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'Leading 0x80 tolarated'
+
+    def testLeading0x80Case2(self):
+        try:
+            decoder.decode(
+                ints2octs((6, 7, 1, 0x80, 0x80, 0x80, 0x80, 0x80, 0x7F))
+            )
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'Leading 0x80 tolarated'
+
+    def testLeading0x80Case3(self):
+        try:
+            decoder.decode(
+                ints2octs((6, 2, 0x80, 1))
+            )
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'Leading 0x80 tolarated'
+
+    def testLeading0x80Case4(self):
+        try:
+            decoder.decode(
+                ints2octs((6, 2, 0x80, 0x7F))
+            )
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'Leading 0x80 tolarated'
+
+    def testTagFormat(self):
+        try:
+            decoder.decode(ints2octs((38, 1, 239)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'wrong tagFormat worked out'
+
+    def testZeroLength(self):
+        try:
+            decoder.decode(ints2octs((6, 0, 0)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'zero length tolarated'
+
+    def testIndefiniteLength(self):
+        try:
+            decoder.decode(ints2octs((6, 128, 0)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'indefinite length tolarated'
+
+    def testReservedLength(self):
+        try:
+            decoder.decode(ints2octs((6, 255, 0)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'reserved length tolerated'
+
+    def testLarge1(self):
+        assert decoder.decode(
+            ints2octs((0x06, 0x11, 0x83, 0xC6, 0xDF, 0xD4, 0xCC, 0xB3, 0xFF, 0xFF, 0xFE, 0xF0, 0xB8, 0xD6, 0xB8, 0xCB,
+                       0xE2, 0xB7, 0x17))
+        ) == ((2, 18446744073709551535184467440737095), null)
+
+    def testLarge2(self):
+        assert decoder.decode(
+            ints2octs((0x06, 0x13, 0x88, 0x37, 0x83, 0xC6, 0xDF, 0xD4, 0xCC, 0xB3, 0xFF, 0xFF, 0xFE, 0xF0, 0xB8, 0xD6,
+                       0xB8, 0xCB, 0xE2, 0xB6, 0x47))
+        ) == ((2, 999, 18446744073709551535184467440737095), null)
+
+
+class RealDecoderTestCase(unittest.TestCase):
+    def testChar(self):
+        assert decoder.decode(
+            ints2octs((9, 7, 3, 49, 50, 51, 69, 49, 49))
+        ) == (univ.Real((123, 10, 11)), null)
+
+    def testBin1(self):  # check base = 2
+        assert decoder.decode(  # (0.5, 2, 0) encoded with base = 2
+            ints2octs((9, 3, 128, 255, 1))
+        ) == (univ.Real((1, 2, -1)), null)
+
+    def testBin2(self):  # check base = 2 and scale factor
+        assert decoder.decode(  # (3.25, 2, 0) encoded with base = 8
+            ints2octs((9, 3, 148, 255, 13))
+        ) == (univ.Real((26, 2, -3)), null)
+
+    def testBin3(self):  # check base = 16
+        assert decoder.decode(  # (0.00390625, 2, 0) encoded with base = 16
+            ints2octs((9, 3, 160, 254, 1))
+        ) == (univ.Real((1, 2, -8)), null)
+
+    def testBin4(self):  # check exponenta = 0
+        assert decoder.decode(  # (1, 2, 0) encoded with base = 2
+            ints2octs((9, 3, 128, 0, 1))
+        ) == (univ.Real((1, 2, 0)), null)
+
+    def testBin5(self):  # case of 2 octs for exponenta and negative exponenta
+        assert decoder.decode(  # (3, 2, -1020) encoded with base = 16
+            ints2octs((9, 4, 161, 255, 1, 3))
+        ) == (univ.Real((3, 2, -1020)), null)
+
+    def testPlusInf(self):
+        assert decoder.decode(
+            ints2octs((9, 1, 64))
+        ) == (univ.Real('inf'), null)
+
+    def testMinusInf(self):
+        assert decoder.decode(
+            ints2octs((9, 1, 65))
+        ) == (univ.Real('-inf'), null)
+
+    def testEmpty(self):
+        assert decoder.decode(
+            ints2octs((9, 0))
+        ) == (univ.Real(0.0), null)
+
+    def testTagFormat(self):
+        try:
+            decoder.decode(ints2octs((41, 0)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'wrong tagFormat worked out'
+
+    def testShortEncoding(self):
+        try:
+            decoder.decode(ints2octs((9, 1, 131)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'accepted too-short real'
+
+
+if sys.version_info[0:2] > (2, 5):
+    class UniversalStringDecoderTestCase(unittest.TestCase):
+        def testDecoder(self):
+            assert decoder.decode(ints2octs((28, 12, 0, 0, 0, 97, 0, 0, 0, 98, 0, 0, 0, 99))) == (char.UniversalString(sys.version_info[0] == 3 and 'abc' or unicode('abc')), null)
+
+
+class BMPStringDecoderTestCase(unittest.TestCase):
+    def testDecoder(self):
+        assert decoder.decode(ints2octs((30, 6, 0, 97, 0, 98, 0, 99))) == (char.BMPString(sys.version_info[0] == 3 and 'abc' or unicode('abc')), null)
+
+
+class UTF8StringDecoderTestCase(unittest.TestCase):
+    def testDecoder(self):
+        assert decoder.decode(ints2octs((12, 3, 97, 98, 99))) == (char.UTF8String(sys.version_info[0] == 3 and 'abc' or unicode('abc')), null)
+
+
+class SequenceDecoderTestCase(unittest.TestCase):
+    def setUp(self):
+        self.s = univ.Sequence(componentType=namedtype.NamedTypes(
+            namedtype.NamedType('place-holder', univ.Null(null)),
+            namedtype.NamedType('first-name', univ.OctetString(null)),
+            namedtype.NamedType('age', univ.Integer(33)))
+        )
+        self.s.setComponentByPosition(0, univ.Null(null))
+        self.s.setComponentByPosition(1, univ.OctetString('quick brown'))
+        self.s.setComponentByPosition(2, univ.Integer(1))
+        self.s.setDefaultComponents()
+
+    def testWithOptionalAndDefaultedDefMode(self):
+        assert decoder.decode(
+            ints2octs((48, 18, 5, 0, 4, 11, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 2, 1, 1))
+        ) == (self.s, null)
+
+    def testWithOptionalAndDefaultedIndefMode(self):
+        assert decoder.decode(
+            ints2octs((48, 128, 5, 0, 36, 128, 4, 11, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 0, 0, 2, 1, 1,
+                       0, 0))
+        ) == (self.s, null)
+
+    def testWithOptionalAndDefaultedDefModeChunked(self):
+        assert decoder.decode(
+            ints2octs(
+                (48, 24, 5, 0, 36, 17, 4, 4, 113, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 3, 111, 119, 110, 2, 1, 1))
+        ) == (self.s, null)
+
+    def testWithOptionalAndDefaultedIndefModeChunked(self):
+        assert decoder.decode(
+            ints2octs((48, 128, 5, 0, 36, 128, 4, 4, 113, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 3, 111, 119, 110, 0,
+                       0, 2, 1, 1, 0, 0))
+        ) == (self.s, null)
+
+    def testWithOptionalAndDefaultedDefModeSubst(self):
+        assert decoder.decode(
+            ints2octs((48, 18, 5, 0, 4, 11, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 2, 1, 1)),
+            substrateFun=lambda a, b, c: (b, c)
+        ) == (ints2octs((5, 0, 4, 11, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 2, 1, 1)), 18)
+
+    def testWithOptionalAndDefaultedIndefModeSubst(self):
+        assert decoder.decode(
+            ints2octs((48, 128, 5, 0, 36, 128, 4, 11, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 0, 0, 2, 1, 1,
+                       0, 0)),
+            substrateFun=lambda a, b, c: (b, c)
+        ) == (ints2octs(
+            (5, 0, 36, 128, 4, 11, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 0, 0, 2, 1, 1, 0, 0)), -1)
+
+    def testTagFormat(self):
+        try:
+            decoder.decode(
+                ints2octs((16, 18, 5, 0, 4, 11, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 2, 1, 1))
+            )
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'wrong tagFormat worked out'
+
+
+class GuidedSequenceDecoderTestCase(unittest.TestCase):
+    def setUp(self):
+        self.s = univ.Sequence(componentType=namedtype.NamedTypes(
+            namedtype.NamedType('place-holder', univ.Null(null)),
+            namedtype.OptionalNamedType('first-name', univ.OctetString(null)),
+            namedtype.DefaultedNamedType('age', univ.Integer(33)),
+        ))
+
+    def __init(self):
+        self.s.clear()
+        self.s.setComponentByPosition(0, univ.Null(null))
+        self.s.setDefaultComponents()
+
+    def __initWithOptional(self):
+        self.s.clear()
+        self.s.setComponentByPosition(0, univ.Null(null))
+        self.s.setComponentByPosition(1, univ.OctetString('quick brown'))
+        self.s.setDefaultComponents()
+
+    def __initWithDefaulted(self):
+        self.s.clear()
+        self.s.setComponentByPosition(0, univ.Null(null))
+        self.s.setComponentByPosition(2, univ.Integer(1))
+        self.s.setDefaultComponents()
+
+    def __initWithOptionalAndDefaulted(self):
+        self.s.clear()
+        self.s.setComponentByPosition(0, univ.Null(null))
+        self.s.setComponentByPosition(1, univ.OctetString('quick brown'))
+        self.s.setComponentByPosition(2, univ.Integer(1))
+        self.s.setDefaultComponents()
+
+    def testDefMode(self):
+        self.__init()
+        assert decoder.decode(
+            ints2octs((48, 128, 5, 0, 0, 0)), asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testIndefMode(self):
+        self.__init()
+        assert decoder.decode(
+            ints2octs((48, 128, 5, 0, 0, 0)), asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testDefModeChunked(self):
+        self.__init()
+        assert decoder.decode(
+            ints2octs((48, 2, 5, 0)), asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testIndefModeChunked(self):
+        self.__init()
+        assert decoder.decode(
+            ints2octs((48, 128, 5, 0, 0, 0)), asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testWithOptionalDefMode(self):
+        self.__initWithOptional()
+        assert decoder.decode(
+            ints2octs((48, 15, 5, 0, 4, 11, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110)), asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testWithOptionaIndefMode(self):
+        self.__initWithOptional()
+        assert decoder.decode(
+            ints2octs((48, 128, 5, 0, 36, 128, 4, 11, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 0, 0, 0, 0)),
+            asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testWithOptionalDefModeChunked(self):
+        self.__initWithOptional()
+        assert decoder.decode(
+            ints2octs((48, 21, 5, 0, 36, 17, 4, 4, 113, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 3, 111, 119, 110)),
+            asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testWithOptionalIndefModeChunked(self):
+        self.__initWithOptional()
+        assert decoder.decode(
+            ints2octs((48, 128, 5, 0, 36, 128, 4, 4, 113, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 3, 111, 119, 110, 0,
+                       0, 0, 0)),
+            asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testWithDefaultedDefMode(self):
+        self.__initWithDefaulted()
+        assert decoder.decode(
+            ints2octs((48, 5, 5, 0, 2, 1, 1)), asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testWithDefaultedIndefMode(self):
+        self.__initWithDefaulted()
+        assert decoder.decode(
+            ints2octs((48, 128, 5, 0, 2, 1, 1, 0, 0)), asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testWithDefaultedDefModeChunked(self):
+        self.__initWithDefaulted()
+        assert decoder.decode(
+            ints2octs((48, 5, 5, 0, 2, 1, 1)), asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testWithDefaultedIndefModeChunked(self):
+        self.__initWithDefaulted()
+        assert decoder.decode(
+            ints2octs((48, 128, 5, 0, 2, 1, 1, 0, 0)), asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testWithOptionalAndDefaultedDefMode(self):
+        self.__initWithOptionalAndDefaulted()
+        assert decoder.decode(
+            ints2octs((48, 18, 5, 0, 4, 11, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 2, 1, 1)),
+            asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testWithOptionalAndDefaultedIndefMode(self):
+        self.__initWithOptionalAndDefaulted()
+        assert decoder.decode(
+            ints2octs((48, 128, 5, 0, 36, 128, 4, 11, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 0, 0, 2, 1, 1,
+                       0, 0)), asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testWithOptionalAndDefaultedDefModeChunked(self):
+        self.__initWithOptionalAndDefaulted()
+        assert decoder.decode(
+            ints2octs(
+                (48, 24, 5, 0, 36, 17, 4, 4, 113, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 3, 111, 119, 110, 2, 1, 1)),
+            asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testWithOptionalAndDefaultedIndefModeChunked(self):
+        self.__initWithOptionalAndDefaulted()
+        assert decoder.decode(
+            ints2octs((48, 128, 5, 0, 36, 128, 4, 4, 113, 117, 105, 99, 4, 4, 107, 32, 98, 114, 4, 3, 111, 119, 110, 0,
+                       0, 2, 1, 1, 0, 0)), asn1Spec=self.s
+        ) == (self.s, null)
+
+
+class ChoiceDecoderTestCase(unittest.TestCase):
+    def setUp(self):
+        self.s = univ.Choice(componentType=namedtype.NamedTypes(
+            namedtype.NamedType('place-holder', univ.Null(null)),
+            namedtype.NamedType('number', univ.Integer(0)),
+            namedtype.NamedType('string', univ.OctetString())
+        ))
+
+    def testBySpec(self):
+        self.s.setComponentByPosition(0, univ.Null(null))
+        assert decoder.decode(
+            ints2octs((5, 0)), asn1Spec=self.s
+        ) == (self.s, null)
+
+    def testWithoutSpec(self):
+        self.s.setComponentByPosition(0, univ.Null(null))
+        assert decoder.decode(ints2octs((5, 0))) == (self.s, null)
+        assert decoder.decode(ints2octs((5, 0))) == (univ.Null(null), null)
+
+    def testUndefLength(self):
+        self.s.setComponentByPosition(2, univ.OctetString('abcdefgh'))
+        assert decoder.decode(ints2octs((36, 128, 4, 3, 97, 98, 99, 4, 3, 100, 101, 102, 4, 2, 103, 104, 0, 0)),
+                              asn1Spec=self.s) == (self.s, null)
+
+    def testExplicitTag(self):
+        s = self.s.subtype(explicitTag=tag.Tag(tag.tagClassContext,
+                                               tag.tagFormatConstructed, 4))
+        s.setComponentByPosition(0, univ.Null(null))
+        assert decoder.decode(ints2octs((164, 2, 5, 0)), asn1Spec=s) == (s, null)
+
+    def testExplicitTagUndefLength(self):
+        s = self.s.subtype(explicitTag=tag.Tag(tag.tagClassContext,
+                                               tag.tagFormatConstructed, 4))
+        s.setComponentByPosition(0, univ.Null(null))
+        assert decoder.decode(ints2octs((164, 128, 5, 0, 0, 0)), asn1Spec=s) == (s, null)
+
+
+class AnyDecoderTestCase(unittest.TestCase):
+    def setUp(self):
+        self.s = univ.Any()
+
+    def testByUntagged(self):
+        assert decoder.decode(
+            ints2octs((4, 3, 102, 111, 120)), asn1Spec=self.s
+        ) == (univ.Any('\004\003fox'), null)
+
+    def testTaggedEx(self):
+        s = univ.Any('\004\003fox').subtype(explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 4))
+        assert decoder.decode(ints2octs((164, 5, 4, 3, 102, 111, 120)), asn1Spec=s) == (s, null)
+
+    def testTaggedIm(self):
+        s = univ.Any('\004\003fox').subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 4))
+        assert decoder.decode(ints2octs((132, 5, 4, 3, 102, 111, 120)), asn1Spec=s) == (s, null)
+
+    def testByUntaggedIndefMode(self):
+        assert decoder.decode(
+            ints2octs((4, 3, 102, 111, 120)), asn1Spec=self.s
+        ) == (univ.Any('\004\003fox'), null)
+
+    def testTaggedExIndefMode(self):
+        s = univ.Any('\004\003fox').subtype(explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 4))
+        assert decoder.decode(ints2octs((164, 128, 4, 3, 102, 111, 120, 0, 0)), asn1Spec=s) == (s, null)
+
+    def testTaggedImIndefMode(self):
+        s = univ.Any('\004\003fox').subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 4))
+        assert decoder.decode(ints2octs((164, 128, 4, 3, 102, 111, 120, 0, 0)), asn1Spec=s) == (s, null)
+
+    def testByUntaggedSubst(self):
+        assert decoder.decode(
+            ints2octs((4, 3, 102, 111, 120)),
+            asn1Spec=self.s,
+            substrateFun=lambda a, b, c: (b, c)
+        ) == (ints2octs((4, 3, 102, 111, 120)), 5)
+
+    def testTaggedExSubst(self):
+        assert decoder.decode(
+            ints2octs((164, 5, 4, 3, 102, 111, 120)),
+            asn1Spec=self.s,
+            substrateFun=lambda a, b, c: (b, c)
+        ) == (ints2octs((164, 5, 4, 3, 102, 111, 120)), 7)
+
+
+class EndOfOctetsTestCase(unittest.TestCase):
+    def testUnexpectedEoo(self):
+        try:
+            decoder.decode(ints2octs((0, 0)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'end-of-contents octets accepted at top level'
+
+    def testExpectedEoo(self):
+        result, remainder = decoder.decode(ints2octs((0, 0)), allowEoo=True)
+        assert eoo.endOfOctets.isSameTypeWith(result) and result == eoo.endOfOctets
+        assert remainder == null
+
+    def testDefiniteNoEoo(self):
+        try:
+            decoder.decode(ints2octs((0x23, 0x02, 0x00, 0x00)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'end-of-contents octets accepted inside definite-length encoding'
+
+    def testIndefiniteEoo(self):
+        result, remainder = decoder.decode(ints2octs((0x23, 0x80, 0x00, 0x00)))
+        assert result == () and remainder == null, 'incorrect decoding of indefinite length end-of-octets'
+
+    def testNoLongFormEoo(self):
+        try:
+            decoder.decode(ints2octs((0x23, 0x80, 0x00, 0x81, 0x00)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'end-of-contents octets accepted with invalid long-form length'
+
+    def testNoConstructedEoo(self):
+        try:
+            decoder.decode(ints2octs((0x23, 0x80, 0x20, 0x00)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'end-of-contents octets accepted with invalid constructed encoding'
+
+    def testNoEooData(self):
+        try:
+            decoder.decode(ints2octs((0x23, 0x80, 0x00, 0x01, 0x00)))
+        except PyAsn1Error:
+            pass
+        else:
+            assert 0, 'end-of-contents octets accepted with unexpected data'
+
+
+suite = unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
+
+if __name__ == '__main__':
+    unittest.TextTestRunner(verbosity=2).run(suite)