Introduce tests and autotests in GitHub CI/CD

Author: em92

.github/workflows/test.yml

@@ -0,0 +1,21 @@
+jobs:
+  test:
+    strategy:
+      matrix:
+        python-version: ["3.12", "3.11", "3.10", "3.9", "3.8", "3.7"]
+        os: ["ubuntu-22.04"]
+
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v3
+      - name: Include ppa repository
+        run: sudo add-apt-repository ppa:deadsnakes/ppa
+      - name: Set up Python ${{ matrix.python-version }}
+        run: |
+          sudo apt-get install python${{ matrix.python-version }}-dev
+          sudo update-alternatives --install /usr/bin/python3 python3 `which python${{ matrix.python-version }}` 1
+          sudo update-alternatives --install /usr/bin/python3-config python3-config `which python${{ matrix.python-version }}-config` 1
+      - name: Install requirements for testing
+        run: sudo python3 -m pip install mockito
+      - name: Run tests
+        run: python3 -m unittest tests

README.md

@@ -98,5 +98,15 @@ and thus not have the client download them automatically.
   - `qlx_workshopReferences`: A comma-separated list of workshop IDs for items you want to force the client to download.
   Use this for custom resources, such as sounds packs and whatnot.
 
+## Develop
+
+To run unittests, use following commands:
+
+```
+git submodule update
+python3 -m pip install mockito
+python3 -m unittest tests
+```
+
 ## Contribute
 If you create pull requests, please try to not deviate from the coding style of the plugins (e.g. don't use camelCase variable names and stuff like that), and please create the PR against the develop branch of the repository.