add new gitlab action (#3)

* add github action

* minor readme update

.github/workflows/python-testing.yml

@@ -0,0 +1,37 @@
+name: Python tests
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  build:
+    runs-on: macos-14
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.10", "3.11", "3.12"]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v3
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install poetry
+        run: pipx install poetry
+      - name: Install dependencies
+        run: |
+          brew install cairo
+          poetry env use python${{ matrix.python-version }}
+          poetry install
+      - name: Lint with flake8
+        run: |
+          poetry run flake8
+      - name: Lint with black
+        run: poetry run black --check .
+      - name: Test with pytest
+        run: |
+          poetry run pytest

README.md

@@ -209,6 +209,9 @@ The project includes unit tests to ensure the functionality of various component
 pytest
 ```
 
+Note that if you have a different cairo version installed some tests might fail. This is due to the fact that the tests compare the rendered images with reference images. If you have a different cairo version installed, the images might look slightly different. 
+
+
 ## Output Example
 
 The image below is an example of a map created using the Mapsy library:

mapsy/icon/icon.py

@@ -1,5 +1,4 @@
 from dataclasses import dataclass
-import os
 from pathlib import Path
 
 from mapsy.common import IconAlign

test/util.py

@@ -1,4 +1,3 @@
-import pytest
 import mapsy
 from contextlib import contextmanager
 from os import path