[CI] Run unit test with non-editable installation (#845)

We have been running unit test with editable installation. (i.e. `python setup.py develop`), with which we missed issues like #842. 

This CC makes installation in CI non-editable, and change test directory structure so that the source code will not shadow the installed version of `torchaudio`. With simple `pytest test`, `pytest` modifies `sys.path` and prepend checked out repository, which shadows the installed version.

To remedy this, the whole test suites has been moved from `./test` to `./test/torchaudio_unittest`. This adds nice module structure to our test code and we can do absolute import in each test module, which makes it possible again to run test with `python -m unittest torchaudio_unittest/XXX.py`

This change does not affect the regular development process (`python setup.py develop` && `pytest test`)

test/datasets/cmuarctic_test.py → test/torchaudio_unittest/datasets/cmuarctic_test.py

@@ -2,7 +2,7 @@ import os
 
 from torchaudio.datasets import cmuarctic
 
-from ..common_utils import (
+from torchaudio_unittest.common_utils import (
     TempDirMixin,
     TorchaudioTestCase,
     get_whitenoise,

test/datasets/commonvoice_test.py → test/torchaudio_unittest/datasets/commonvoice_test.py

@@ -3,7 +3,7 @@ import csv
 import random
 
 from torchaudio.datasets import commonvoice
-from ..common_utils import (
+from torchaudio_unittest.common_utils import (
     TempDirMixin,
     TorchaudioTestCase,
     get_whitenoise,

test/datasets/datasets_test.py → test/torchaudio_unittest/datasets/datasets_test.py

@@ -2,7 +2,7 @@ from torchaudio.datasets.librispeech import LIBRISPEECH
 from torchaudio.datasets.speechcommands import SPEECHCOMMANDS
 from torchaudio.datasets.vctk import VCTK
 
-from ..common_utils import (
+from torchaudio_unittest.common_utils import (
     TorchaudioTestCase,
     get_asset_path,
 )

test/datasets/gtzan_test.py → test/torchaudio_unittest/datasets/gtzan_test.py

@@ -2,7 +2,7 @@ import os
 
 from torchaudio.datasets import gtzan
 
-from ..common_utils import (
+from torchaudio_unittest.common_utils import (
     TempDirMixin,
     TorchaudioTestCase,
     get_whitenoise,

test/datasets/librispeech_test.py → test/torchaudio_unittest/datasets/librispeech_test.py

@@ -2,7 +2,7 @@ import os
 
 from torchaudio.datasets import librispeech
 
-from ..common_utils import (
+from torchaudio_unittest.common_utils import (
     TempDirMixin,
     TorchaudioTestCase,
     get_whitenoise,

test/datasets/libritts_test.py → test/torchaudio_unittest/datasets/libritts_test.py

@@ -2,7 +2,7 @@ import os
 
 from torchaudio.datasets.libritts import LIBRITTS
 
-from ..common_utils import (
+from torchaudio_unittest.common_utils import (
     TempDirMixin,
     TorchaudioTestCase,
     get_whitenoise,

test/datasets/ljspeech_test.py → test/torchaudio_unittest/datasets/ljspeech_test.py

@@ -3,7 +3,7 @@ import os
 
 from torchaudio.datasets import ljspeech
 
-from ..common_utils import (
+from torchaudio_unittest.common_utils import (
     TempDirMixin,
     TorchaudioTestCase,
     get_whitenoise,

test/datasets/speechcommands_test.py → test/torchaudio_unittest/datasets/speechcommands_test.py

@@ -2,7 +2,7 @@ import os
 
 from torchaudio.datasets import speechcommands
 
-from ..common_utils import (
+from torchaudio_unittest.common_utils import (
     TempDirMixin,
     TorchaudioTestCase,
     get_whitenoise,

test/datasets/utils_test.py → test/torchaudio_unittest/datasets/utils_test.py

@@ -4,7 +4,7 @@ from pathlib import Path
 from torchaudio.datasets import utils as dataset_utils
 from torchaudio.datasets.commonvoice import COMMONVOICE
 
-from ..common_utils import (
+from torchaudio_unittest.common_utils import (
     TempDirMixin,
     TorchaudioTestCase,
     get_asset_path,

test/datasets/yesno_test.py → test/torchaudio_unittest/datasets/yesno_test.py

@@ -2,7 +2,7 @@ import os
 
 from torchaudio.datasets import yesno
 
-from ..common_utils import (
+from torchaudio_unittest.common_utils import (
     TempDirMixin,
     TorchaudioTestCase,
     get_whitenoise,

test/functional_cpu_test.py → test/torchaudio_unittest/functional/functional_cpu_test.py

@@ -7,7 +7,7 @@ import torchaudio.functional as F
 from parameterized import parameterized
 import pytest
 
-from . import common_utils
+from torchaudio_unittest import common_utils
 from .functional_impl import Lfilter
 
 

test/functional_cuda_test.py → test/torchaudio_unittest/functional/functional_cuda_test.py

 import torch
 
-from . import common_utils
+from torchaudio_unittest import common_utils
 from .functional_impl import Lfilter
 
 

test/functional_impl.py → test/torchaudio_unittest/functional/functional_impl.py

@@ -2,7 +2,7 @@
 import torch
 import torchaudio.functional as F
 
-from . import common_utils
+from torchaudio_unittest import common_utils
 
 
 class Lfilter(common_utils.TestBaseMixin):

test/test_io.py → test/torchaudio_unittest/io_test.py

@@ -9,7 +9,7 @@ import torchaudio
 from torchaudio.utils import sox_utils
 from torchaudio._internal.module_utils import is_module_available
 
-from .common_utils import get_asset_path
+from torchaudio_unittest.common_utils import get_asset_path
 
 BACKENDS = []
 BACKENDS_MP3 = []

test/kaldi_compatibility_cpu_test.py → test/torchaudio_unittest/kaldi_compatibility_cpu_test.py

 import torch
 
-from . import common_utils
+from torchaudio_unittest import common_utils
 from .kaldi_compatibility_impl import Kaldi
 
 

test/kaldi_compatibility_cuda_test.py → test/torchaudio_unittest/kaldi_compatibility_cuda_test.py

 import torch
 
-from . import common_utils
+from torchaudio_unittest import common_utils
 from .kaldi_compatibility_impl import Kaldi
 
 

test/kaldi_compatibility_impl.py → test/torchaudio_unittest/kaldi_compatibility_impl.py

@@ -7,7 +7,7 @@ import torchaudio.functional as F
 import torchaudio.compliance.kaldi
 from parameterized import parameterized
 
-from .common_utils import (
+from torchaudio_unittest.common_utils import (
     TestBaseMixin,
     load_params,
     skipIfNoExec,

test/test_kaldi_io.py → test/torchaudio_unittest/kaldi_io_test.py

@@ -3,7 +3,7 @@ import unittest
 import torch
 import torchaudio.kaldi_io as kio
 
-from . import common_utils
+from torchaudio_unittest import common_utils
 
 
 class Test_KaldiIO(common_utils.TorchaudioTestCase):

test/test_librosa_compatibility.py → test/torchaudio_unittest/librosa_compatibility_test.py

@@ -17,7 +17,7 @@ if LIBROSA_AVAILABLE:
 
 import pytest
 
-from . import common_utils
+from torchaudio_unittest import common_utils
 
 
 @unittest.skipIf(not LIBROSA_AVAILABLE, "Librosa not available")