Add inference unit test on GitHub workflow

.github/workflows/inference_tests.yml

@@ -0,0 +1,46 @@
+name: inference_tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types: [opened, synchronize, reopened]
+jobs:
+  check_skip:
+    runs-on: ubuntu-latest
+    if: "! contains(github.event.head_commit.message, '[ci skip]')"
+    steps:
+      - run: echo "${{ github.event.head_commit.message }}"
+
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [3.6, 3.7, 3.8, 3.9]
+        experimental: [false]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: coqui-ai/setup-python@pip-cache-key-py-ver
+        with:
+          python-version: ${{ matrix.python-version }}
+          architecture: x64
+          cache: 'pip'
+          cache-dependency-path: 'requirements*'
+      - name: check OS
+        run: cat /etc/os-release
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends git make gcc
+          make system-deps
+      - name: Install/upgrade Python setup deps
+        run: python3 -m pip install --upgrade pip setuptools wheel
+      - name: Install TTS
+        run: |
+          python3 -m pip install .[all]
+          python3 setup.py egg_info
+      - name: Unit tests
+        run: make inference_tests

Makefile

@@ -26,6 +26,9 @@ test_aux:	## run aux tests.
 test_zoo:	## run zoo tests.
 	nosetests tests.zoo_tests -x --with-cov -cov  --cover-erase --cover-package TTS tests.zoo_tests --nologcapture --with-id
 
+inference_tests: ## run inference tests.
+	nosetests tests.inference_tests -x --with-cov -cov  --cover-erase --cover-package TTS tests.inference_tests --nologcapture --with-id	
+
 test_failed:  ## only run tests failed the last time.
 	nosetests -x --with-cov -cov  --cover-erase --cover-package TTS tests --nologcapture --failed