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# 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

# http://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.

import contextlib

import io

import re

import sys

from gcp.testing.flaky import flaky

import pytest

import speech_streaming

class MockAudioStream(object):

def __init__(self, audio_filename, trailing_silence_secs=10):

self.audio_filename = audio_filename

self.silence = io.BytesIO('\0\0' * speech_streaming.RATE *

trailing_silence_secs)

def __enter__(self):

self.audio_file = open(self.audio_filename)

return self

def __exit__(self, *args):

self.audio_file.close()

def __call__(self, *args):

return self

def read(self, num_frames):

# audio is 16-bit samples, whereas python byte is 8-bit

num_bytes = 2 * num_frames

chunk = self.audio_file.read(num_bytes) or self.silence.read(num_bytes)

return chunk

def mock_audio_stream(filename):

@contextlib.contextmanager

def mock_audio_stream(channels, rate, chunk):

with open(filename, 'rb') as audio_file:

yield audio_file

return mock_audio_stream

@flaky

@pytest.mark.skipif(

sys.version_info >= (3, 0),

reason=("grpc doesn't yet support python3 "

'https://github.com/grpc/grpc/issues/282'))

def test_main(resource, monkeypatch, capsys):

monkeypatch.setattr(

speech_streaming, 'record_audio',

mock_audio_stream(resource('quit.raw')))

monkeypatch.setattr(speech_streaming, 'DEADLINE_SECS', 5)

speech_streaming.main()

out, err = capsys.readouterr()

assert re.search(r'transcript.*"quit"', out, re.DOTALL | re.I)

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