Add configurations and documentation to run tests with Tox

Author: strohganoff

.gitignore

@@ -11,6 +11,7 @@ reports/
 
 *.pyc
 .pytest_cache
+.tox
 __pycache__
 .DS_Store
 

development.md

@@ -43,7 +43,17 @@ pytest
 
 This will run all tests located in the `tests/` directory.
 
-## Running Tests with Coverage
+### Running Tests with multiple Python versions
+
+Multiple versions of Python can be tested using Tox. Versions 3.9-3.13 are supported. To have Tox run the tests, simply call its command:
+
+```sh
+tox
+```
+
+Tox will create an isolated environment for each Python version to run the tests in.
+
+### Running Tests with Coverage
 
 To run the tests and generate coverage reports, use the following command:
 

pyproject.toml

@@ -39,6 +39,7 @@
             "pytest-cov >= 5.0.0",
             "pytest-mock >= 3.14.0",
             "pytest-sugar >= 1.0.0",
+            "tox >= 4.23.2",
         ]
 
     [project.urls]
@@ -209,6 +210,15 @@
     testpaths = ["tests"]
 
 
+[tool.tox]
+    envlist = ["py39", "py310", "py311", "py312", "py313"]
+
+    [tool.tox.env_run_base]
+        deps = [".[dev]"]
+        commands = [["pytest", "tests/"]]
+        allowlist_externals = ["echo"]
+
+
 [tool.coverage.run]  # Configure coverage.py to measure branch coverage and specify source files to be measured.
     branch = true  # Enable branch coverage
     source = ["streamdeck"]  # Specify the source files for coverage.