add tox configuration for testing multiple versions

- set targeted supported versions to python {3.7, 3.8, 3.9, 3.10} x pytest {7, 8}
- change dependency of pytest to >=7.0,<9.0

Author: pengyunie

pyproject.toml

@@ -7,7 +7,7 @@ name = "inline"
 dynamic = ["version"]
 description = "A pytest plugin for writing inline tests"
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.7"
 license = { file = "LICENSE" }
 authors = [{ name = "Yu Liu", email = "im.yukiliu@gmail.com" }]
 maintainers = [
@@ -33,10 +33,10 @@ classifiers = [
     "Operating System :: OS Independent",
     "License :: OSI Approved :: MIT License",
 ]
-dependencies = ["pytest~=7.0"]
+dependencies = ["pytest>=7.0,<9.0"]
 
 [project.optional-dependencies]
-dev = ["hatch", "coverage[toml]", "black", "ruff", "tox"]
+dev = ["hatch", "coverage[toml]", "black", "ruff", "tox>=4.19"]
 
 [project.urls]
 Issues = "https://github.com/pytest-dev/pytest-inline/issues"

tox.ini

@@ -1,14 +1,12 @@
 [tox]
 isolated_build = True
-envlist =
-    py{37,38,39,310}
+requires = 
+    tox>=4.19
+env_list = py{37,38,39,310}-pytest{7,8}
 
 [testenv]
-commands = pytest -p pytester
 deps = 
+    pytest7: pytest~=7.0
+    pytest8: pytest~=8.0
+commands = 
     pytest
-    pytest-cov
-    flake8
-    black
-setenv =
-    PYTHONDEVMODE=1