Run integration tests on CI (#1939)

.github/workflows/integration-test.yml

+name: Integration Test
+
+on:
+  pull_request:
+    branches: [ main ]
+
+  workflow_dispatch:
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [ 3.8 ]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install packages
+      run: |
+        python -m pip install --quiet --upgrade pip
+        python -m pip install --quiet --pre torch -f https://download.pytorch.org/whl/nightly/cpu/torch_nightly.html
+        python -m pip install --quiet pytest requests cmake ninja deep-phonemizer
+        git submodule update --init --recursive
+        python setup.py install
+    - name: Run integration test
+      run: |
+        cd test && pytest integration_tests -v --use-tmp-hub-dir

test/integration_tests/conftest.py

@@ -55,3 +55,25 @@ def sample_speech(tmp_path, lang):
                 resp.raise_for_status()
                 file.write(resp.content)
     return path
+
+
+def pytest_addoption(parser):
+    parser.addoption(
+        "--use-tmp-hub-dir",
+        action="store_true",
+        help=(
+            "When provided, tests will use temporary directory as Torch Hub directory. "
+            "Downloaded models will be deleted after each test."
+        )
+    )
+
+
+@pytest.fixture(autouse=True)
+def temp_hub_dir(tmpdir, pytestconfig):
+    if not pytestconfig.getoption('use_tmp_hub_dir'):
+        yield
+    else:
+        org_dir = torch.hub.get_dir()
+        torch.hub.set_dir(tmpdir)
+        yield
+        torch.hub.set_dir(org_dir)