Ausgabe der neuen DB Einträge

venv/lib/python3.9/site-packages/twisted/positioning/test/test_sentence.py

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+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+"""
+Tests for positioning sentences.
+"""
+
+from __future__ import absolute_import, division
+
+import itertools
+
+from twisted.positioning import _sentence
+from twisted.trial.unittest import TestCase
+
+
+sentinelValueOne = "someStringValue"
+sentinelValueTwo = "someOtherStringValue"
+
+
+
+class DummyProtocol(object):
+    """
+    A simple, fake protocol.
+    """
+    @staticmethod
+    def getSentenceAttributes():
+        return ["type", sentinelValueOne, sentinelValueTwo]
+
+
+
+class DummySentence(_sentence._BaseSentence):
+    """
+    A sentence for L{DummyProtocol}.
+    """
+    ALLOWED_ATTRIBUTES = DummyProtocol.getSentenceAttributes()
+
+
+
+class MixinProtocol(_sentence._PositioningSentenceProducerMixin):
+    """
+    A simple, fake protocol that declaratively tells you the sentences
+    it produces using L{base.PositioningSentenceProducerMixin}.
+    """
+    _SENTENCE_CONTENTS = {
+        None: [
+            sentinelValueOne,
+            sentinelValueTwo,
+            None  # See MixinTests.test_noNoneInSentenceAttributes
+        ],
+    }
+
+
+
+class MixinSentence(_sentence._BaseSentence):
+    """
+    A sentence for L{MixinProtocol}.
+    """
+    ALLOWED_ATTRIBUTES = MixinProtocol.getSentenceAttributes()
+
+
+
+class SentenceTestsMixin(object):
+    """
+    Tests for positioning protocols and their respective sentences.
+    """
+    def test_attributeAccess(self):
+        """
+        A sentence attribute gets the correct value, and accessing an
+        unset attribute (which is specified as being a valid sentence
+        attribute) gets L{None}.
+        """
+        thisSentinel = object()
+        sentence = self.sentenceClass({sentinelValueOne: thisSentinel})
+        self.assertEqual(getattr(sentence, sentinelValueOne), thisSentinel)
+        self.assertIsNone(getattr(sentence, sentinelValueTwo))
+
+
+    def test_raiseOnMissingAttributeAccess(self):
+        """
+        Accessing a nonexistent attribute raises C{AttributeError}.
+        """
+        sentence = self.sentenceClass({})
+        self.assertRaises(AttributeError, getattr, sentence, "BOGUS")
+
+
+    def test_raiseOnBadAttributeAccess(self):
+        """
+        Accessing bogus attributes raises C{AttributeError}, *even*
+        when that attribute actually is in the sentence data.
+        """
+        sentence = self.sentenceClass({"BOGUS": None})
+        self.assertRaises(AttributeError, getattr, sentence, "BOGUS")
+
+
+    sentenceType = "tummies"
+    reprTemplate = "<%s (%s) {%s}>"
+
+
+    def _expectedRepr(self, sentenceType="unknown type", dataRepr=""):
+        """
+        Builds the expected repr for a sentence.
+
+        @param sentenceType: The name of the sentence type (e.g "GPGGA").
+        @type sentenceType: C{str}
+        @param dataRepr: The repr of the data in the sentence.
+        @type dataRepr: C{str}
+        @return: The expected repr of the sentence.
+        @rtype: C{str}
+        """
+        clsName = self.sentenceClass.__name__
+        return self.reprTemplate % (clsName, sentenceType, dataRepr)
+
+
+    def test_unknownTypeRepr(self):
+        """
+        Test the repr of an empty sentence of unknown type.
+        """
+        sentence = self.sentenceClass({})
+        expectedRepr = self._expectedRepr()
+        self.assertEqual(repr(sentence), expectedRepr)
+
+
+    def test_knownTypeRepr(self):
+        """
+        Test the repr of an empty sentence of known type.
+        """
+        sentence = self.sentenceClass({"type": self.sentenceType})
+        expectedRepr = self._expectedRepr(self.sentenceType)
+        self.assertEqual(repr(sentence), expectedRepr)
+
+
+
+class MixinTests(TestCase, SentenceTestsMixin):
+    """
+    Tests for protocols deriving from L{base.PositioningSentenceProducerMixin}
+    and their sentences.
+    """
+    def setUp(self):
+        self.protocol = MixinProtocol()
+        self.sentenceClass = MixinSentence
+
+
+    def test_noNoneInSentenceAttributes(self):
+        """
+        L{None} does not appear in the sentence attributes of the
+        protocol, even though it's in the specification.
+
+        This is because L{None} is a placeholder for parts of the sentence you
+        don't really need or want, but there are some bits later on in the
+        sentence that you do want. The alternative would be to have to specify
+        things like "_UNUSED0", "_UNUSED1"... which would end up cluttering
+        the sentence data and eventually adapter state.
+        """
+        sentenceAttributes = self.protocol.getSentenceAttributes()
+        self.assertNotIn(None, sentenceAttributes)
+
+        sentenceContents = self.protocol._SENTENCE_CONTENTS
+        sentenceSpecAttributes = itertools.chain(*sentenceContents.values())
+        self.assertIn(None, sentenceSpecAttributes)