def test_run_trigram(self):
viterbi = ViterbiMath(self._unigramCount, self._bigramCount,
self._trigramCount, self._tagWordCount)
expected_tag_seq = "FW <s>\nFW the\nFW cat\nFW is\nIN pretty\n. .\n"
viterbi.run(self._testFile, self._outputFile, 3)
actual_tag_seq = open(self._outputFile, 'r').read()
self.assertEquals(expected_tag_seq, actual_tag_seq, "run trigram test")
def test_run_bigram(self):
viterbi = ViterbiMath(self._unigramCount, self._bigramCount,
self._trigramCount, self._tagWordCount)
expected_tag_seq = "<s> <s>\nDT the\nNN cat\nVBZ is\nRB pretty\n. .\n"
viterbi.run(self._testFile, self._outputFile, 2)
actual_tag_seq = open(self._outputFile, 'r').read()
self.assertEquals(expected_tag_seq, actual_tag_seq, "run bigram test")
def test_trigram_viterbi(self):
dt = DynamicTable()
viterbi = ViterbiMath(self._obsT, self._transmBi, self._transmTri, self._tags)
col = 0
dt.update(viterbi.get_next_column(dt, 3, col, self._wordSeq[col]))
col = col + 1
dt.update(viterbi.get_next_column(dt, 3, col, self._wordSeq[col]))
expected_table = [{'VB': 0.1, 'NN': 0.1}, {'VB': 0.004000000000000001, 'NN': 0.027999999999999997}]
actual_table = dt.probs
self.assertListEqual(expected_table, actual_table, "do_trigram() probability computation test")
def test_run(self):
viterbi = ViterbiMath(self._unigramCount, self._bigramCount,
self._trigramCount, self._tagWordCount, self._vocabDict)
viterbi.run("data/test.pos", "data/outputtest.txt", 2)
def test_predict_trigram(self):
viterbi = ViterbiMath(self._obsT, self._transmBi, self._transmTri, self._tags)
expected_tag_seq = ['NN', 'VB', 'NN', 'NN']
actual_tag_seq = viterbi.predict(self._wordSeq, 3)
self.assertListEqual(expected_tag_seq, actual_tag_seq, "predict tag seq using trigram model")
