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# encoding: UTF-8
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# Copyright 2017 Google.com
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import unittest
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import numpy as np
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from code import my_txtutils as txt
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TST_TXTSIZE = 10000
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TST_SEQLEN = 10
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TST_BATCHSIZE = 13
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TST_EPOCHS = 5
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class RnnMinibatchSequencerTest(unittest.TestCase):
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def setUp(self):
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# generate text of consecutive items
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self.data = list(range(TST_TXTSIZE))
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@staticmethod
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def check_seq_batch(batch1, batch2):
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nb_errors = 0
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for i in range(TST_BATCHSIZE):
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ok = batch1[i, -1] + 1 == batch2[i, 0]
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nb_errors += 0 if ok else 1
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return nb_errors
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def test_sequences(self):
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for x, y, epoch in txt.rnn_minibatch_sequencer(self.data, TST_BATCHSIZE, TST_SEQLEN, TST_EPOCHS):
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for i in range(TST_BATCHSIZE):
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self.assertListEqual(x[i, 1:].tolist(), y[i, :-1].tolist(),
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msg="y sequences must be equal to x sequences shifted by -1")
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def test_batches(self):
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start = True
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prev_x = np.zeros([TST_BATCHSIZE, TST_SEQLEN], np.int32)
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prev_y = np.zeros([TST_BATCHSIZE, TST_SEQLEN], np.int32)
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nb_errors = 0
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nb_batches = 0
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for x, y, epoch in txt.rnn_minibatch_sequencer(self.data, TST_BATCHSIZE, TST_SEQLEN, TST_EPOCHS):
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if not start:
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nb_errors += self.check_seq_batch(prev_x, x)
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nb_errors += self.check_seq_batch(prev_y, y)
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prev_x = x
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prev_y = y
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start = False
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nb_batches += 1
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self.assertLessEqual(nb_errors, 2 * TST_EPOCHS,
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msg="Sequences should be correctly continued, even between epochs. Only "
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"one sequence is allowed to not continue from one epoch to the next.")
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self.assertLess(TST_TXTSIZE - (nb_batches * TST_BATCHSIZE * TST_SEQLEN),
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TST_BATCHSIZE * TST_SEQLEN * TST_EPOCHS,
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msg="Text ignored at the end of an epoch must be smaller than one batch of sequences")
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class EncodingTest(unittest.TestCase):
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def setUp(self):
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self.test_text_known_chars = \
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"PRIDE AND PREJUDICE" \
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"\n" \
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"By Jane Austen" \
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"\n" \
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"\n" \
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"\n" \
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"Chapter 1" \
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"\n" \
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"\n" \
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"It is a truth universally acknowledged, that a single man in possession " \
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"of a good fortune, must be in want of a wife." \
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"\n\n" \
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"However little known the feelings or views of such a man may be on his " \
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"first entering a neighbourhood, this truth is so well fixed in the minds " \
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"of the surrounding families, that he is considered the rightful property " \
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"of some one or other of their daughters." \
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"\n\n" \
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"\"My dear Mr. Bennet,\" said his lady to him one day, \"have you heard that " \
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"Netherfield Park is let at last?\"" \
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"\n\n" \
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"Mr. Bennet replied that he had not." \
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"\n\n" \
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"\"But it is,\" returned she; \"for Mrs. Long has just been here, and she " \
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"told me all about it.\"" \
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"\n\n" \
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"Mr. Bennet made no answer." \
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"\n\n" \
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"\"Do you not want to know who has taken it?\" cried his wife impatiently." \
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"\n\n" \
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"\"_You_ want to tell me, and I have no objection to hearing it.\"" \
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"\n\n" \
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"This was invitation enough." \
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"\n\n" \
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"\"Why, my dear, you must know, Mrs. Long says that Netherfield is taken " \
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"by a young man of large fortune from the north of England; that he came " \
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"down on Monday in a chaise and four to see the place, and was so much " \
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"delighted with it, that he agreed with Mr. Morris immediately; that he " \
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"is to take possession before Michaelmas, and some of his servants are to " \
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"be in the house by the end of next week.\"" \
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"\n\n" \
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"\"What is his name?\"" \
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"\n\n" \
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"\"Bingley.\"" \
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"\n\n" \
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"Testing punctuation: !\"#$%&\'()*+,-./0123456789:;<=>?@[\\]^_`{|}~" \
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"\n" \
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"Tab\x09Tab\x09Tab\x09Tab" \
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"\n"
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self.test_text_unknown_char = "Unknown char: \x0C" # the unknown char 'new page'
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def test_encoding(self):
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encoded = txt.encode_text(self.test_text_known_chars)
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decoded = txt.decode_to_text(encoded)
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self.assertEqual(self.test_text_known_chars, decoded,
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msg="On a sequence of supported characters, encoding, "
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"then decoding should yield the original string.")
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def test_unknown_encoding(self):
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encoded = txt.encode_text(self.test_text_unknown_char)
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decoded = txt.decode_to_text(encoded)
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original_fix = self.test_text_unknown_char[:-1] + chr(0)
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self.assertEqual(original_fix, decoded,
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msg="The last character of the test sequence is an unsupported "
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"character and should be encoded and decoded as 0.")
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class TxtProgressTest(unittest.TestCase):
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def test_progress_indicator(self):
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print("If the printed output of this test is incorrect, the test will fail. No need to check visually.", end='')
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test_cases = (50, 51, 49, 1, 2, 3, 1000, 333, 101)
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p = txt.Progress(100)
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for maxi in test_cases:
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m, cent = self.check_progress_indicator(p, maxi)
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self.assertEqual(m, maxi, msg="Incorrect number of steps.")
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self.assertEqual(cent, 100, msg="Incorrect number of steps.")
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@staticmethod
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def check_progress_indicator(p, maxi):
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p._Progress__print_header()
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progress = p._Progress__start_progress(maxi)
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total = 0
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n = 0
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for k in progress():
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total += k
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n += 1
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return n, total
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