Fixed CI error, add one more test just to check paths

.github/workflows/test.yml

@@ -24,7 +24,7 @@ jobs:
     - name: Install package
       run: |
         sudo apt-get install -y libgl1-mesa-dev
-        pip install .[dev]
+        pip install -e .[dev]
     - name: Pytest
       run: |
         pytest test

pyproject.toml

@@ -78,7 +78,7 @@ line-length = 120
 dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
 
 # Assume Python 3.10.
-target-version = "py310"
+target-version = "py39"
 
 [tool.ruff.per-file-ignores]
 "__init__.py" = ["F401"]
@@ -89,7 +89,7 @@ max-complexity = 10
 
 [tool.black]
 line-length = 88
-target-version = ['py310']
+target-version = ['py39']
 include = '\.pyi?$'
 # `extend-exclude` is not honored when `black` is passed a file path explicitly,
 # as is typical when `black` is invoked via `pre-commit`.

test/test_visualization.py

@@ -0,0 +1,21 @@
+import cv2
+import os
+
+from zsos.utils.visualization import generate_text_image
+
+
+def test_visualization():
+    width = 400
+    text = (
+        "This is a long text that needs to be drawn on an image with a specified "
+        "width. The text should wrap around if it exceeds the given width."
+    )
+
+    result_image = generate_text_image(width, text)
+
+    # Save the image to a file
+    output_filename = "build/output_image.png"
+    cv2.imwrite(output_filename, result_image)
+
+    # Assert that the file exists
+    assert os.path.exists(output_filename), "Output image file not found!"