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#!/usr/bin/env python3
# Copyright (C) 2020 Arm Limited or its affiliates. All rights reserved.
#
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the License); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an AS IS BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Simple example of the usage of mlw_codec.
import pytest
from ethosu import mlw_codec
class TestMLWCodec:
""" This class is responsible to test the mlw_codec library
It mainly tests the two methods encode() and decode() with different inputs"""
weights = [0, 2, 3, 0, -1, -2, -3, 0, 0, 0, 1, -250, 240] * 3
compressed_weights = bytearray(
b"\xb8\x00\\q^\x1f\xfc\x01\x03\x05\x08\x0c\x10\x908\x12\xd7\x99:\xd2\x99$\xae#\x9d\xa9#\x00\xf0\xff\xff\xff"
)
empty_decoded = bytearray(b"\xfe\xffC\x00\xf0\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff")
# Generate parameters lists for the tests below
encode_testdata = [
(mlw_codec.encode, weights, compressed_weights),
pytest.param(mlw_codec.encode, ["a"], empty_decoded, marks=pytest.mark.xfail), # cannot accept strings
]
decode_testdata = [(mlw_codec.decode, compressed_weights, weights)]
codec_testdata = [
(weights, weights),
([1] * 10, [1] * 10),
pytest.param(["a"], ["a"], marks=pytest.mark.xfail), # cannot accept strings
]
@pytest.mark.parametrize("function_under_test,test_input,expected", encode_testdata)
def test_mlw_codec(self, function_under_test, test_input, expected):
self._call_mlw_codec_method(function_under_test, test_input, expected)
@pytest.mark.parametrize("function_under_test,test_input,expected", decode_testdata)
def test_mlw_decode(self, function_under_test, test_input, expected):
self._call_mlw_codec_method(function_under_test, test_input, expected)
@pytest.mark.parametrize("test_input,expected", codec_testdata)
def test_mlw_encode_decode(self, test_input, expected):
output = mlw_codec.decode(mlw_codec.encode(test_input))
assert output == expected
def _call_mlw_codec_method(self, method_name, test_input, expected):
output = method_name(test_input)
assert output == expected
invalid_encode_test_data = [None, 3, [4, 5, None, 7], [0, 1, "two", 3], [1, 2, 256, 4], [2, 4, 8, -256]]
@pytest.mark.parametrize("input", invalid_encode_test_data)
def test_encode_invalid_input(self, input):
with pytest.raises(Exception):
mlw_codec.encode(input)
invalid_decode_test_data = [None, 3, []]
@pytest.mark.parametrize("input", invalid_decode_test_data)
def test_decode_invalid_input(self, input):
with pytest.raises(Exception):
mlw_codec.decode(input)
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