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89 lines
3.3 KiB
89 lines
3.3 KiB
#!/usr/bin/env python3
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# Copyright 2020 The Pigweed Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy of
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# the License at
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#
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# https://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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations under
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# the License.
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"""Tests the tokenized string encoder module."""
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import unittest
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import varint_test_data
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from pw_tokenizer.encode import encode_token_and_args
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class TestEncodeTokenized(unittest.TestCase):
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"""Tests encoding tokenized strings with various arguments."""
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def test_no_args(self):
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self.assertEqual(b'\xab\xcd\x12\x34',
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encode_token_and_args(0x3412cdab))
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self.assertEqual(b'\x00\x00\x00\x00', encode_token_and_args(0))
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def test_int(self):
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self.assertEqual(b'\xff\xff\xff\xff\0',
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encode_token_and_args(0xffffffff, 0))
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self.assertEqual(b'\xff\xff\xff\xff\1',
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encode_token_and_args(0xffffffff, -1))
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self.assertEqual(b'\xff\xff\xff\xff\2',
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encode_token_and_args(0xffffffff, 1))
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def test_float(self):
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self.assertEqual(b'\xff\xff\xff\xff\0\0\0\0',
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encode_token_and_args(0xffffffff, 0.0))
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self.assertEqual(b'\xff\xff\xff\xff\0\0\0\x80',
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encode_token_and_args(0xffffffff, -0.0))
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def test_string(self):
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self.assertEqual(b'\xff\xff\xff\xff\5hello',
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encode_token_and_args(0xffffffff, 'hello'))
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self.assertEqual(b'\xff\xff\xff\xff\x7f' + b'!' * 127,
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encode_token_and_args(0xffffffff, '!' * 127))
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def test_string_too_long(self):
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self.assertEqual(b'\xff\xff\xff\xff\xff' + b'!' * 127,
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encode_token_and_args(0xffffffff, '!' * 128))
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def test_bytes(self):
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self.assertEqual(b'\xff\xff\xff\xff\4\0yo\0',
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encode_token_and_args(0xffffffff, '\0yo\0'))
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def test_bytes_too_long(self):
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self.assertEqual(b'\xff\xff\xff\xff\xff' + b'?' * 127,
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encode_token_and_args(0xffffffff, b'?' * 200))
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def test_multiple_args(self):
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self.assertEqual(b'\xdd\xcc\xbb\xaa\0',
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encode_token_and_args(0xaabbccdd, 0))
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class TestIntegerEncoding(unittest.TestCase):
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"""Test encoding variable-length integers."""
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def test_encode_generated_data(self):
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test_data = varint_test_data.TEST_DATA
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self.assertGreater(len(test_data), 100)
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for _, signed, _, unsigned, encoded in test_data:
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# Skip numbers that are larger than 32-bits, since they aren't
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# supported currently.
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if int(unsigned).bit_length() > 32:
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continue
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# Encode the value as an arg, but skip the 4 bytes for the token.
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self.assertEqual(
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encode_token_and_args(0, int(signed))[4:], encoded)
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self.assertEqual(
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encode_token_and_args(0, int(unsigned))[4:], encoded)
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if __name__ == '__main__':
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unittest.main()
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