Update test dependencies

Author: lvoytek

pyproject.toml

@@ -13,6 +13,56 @@ dependencies = [
     "ops~=2.17",
 ]
 
+[dependency-groups]
+
+charmlibs = [
+    "charmlibs-apt>=1.0.0",
+    "charmlibs-pathops>=1.0.0",
+]
+
+format = [
+    "black",
+    "isort",
+]
+
+lint = [
+    "mypy",
+    "isort",
+    "black",
+    "flake8-docstrings",
+    "flake8-docstrings-complete",
+    "flake8-builtins",
+    "flake8-test-docs",
+    "pep8-naming",
+    "codespell",
+    "pylint",
+    "pyproject-flake8",
+    "pydocstyle",
+    "types-PyYAML",
+]
+
+unit = [
+    "pytest",
+    "coverage[toml]",
+    "ops[testing]",
+]
+
+coverage-report = [
+    "pytest",
+    "coverage[toml]",
+    "ops[testing]",
+]
+
+static = [
+    "pyright",
+    "ops[testing]",
+]
+
+integration = [
+    "pytest",
+    "jubilant~=1.0",
+]
+
 # Testing tools configuration
 [tool.coverage.run]
 branch = true

tox.ini

@@ -25,32 +25,16 @@ pass_env =
 
 [testenv:format]
 description = Apply coding style standards to code
-deps =
-    black
-    isort
+dependency_groups = format
 commands =
     isort {[vars]all_path}
     black {[vars]all_path}
 
 [testenv:lint]
 description = Check code against coding style standards
-deps =
-    mypy
-    isort
-    black
-    flake8-docstrings
-    flake8-docstrings-complete
-    flake8-builtins
-    flake8-test-docs
-    pep8-naming
-    codespell
-    pylint
-    pyproject-flake8
-    pydocstyle
-    types-PyYAML
-    ops
-    charmlibs-pathops
-    charmlibs-apt
+dependency_groups =
+    lint
+    charmlibs
 commands =
     black --check --diff {[vars]all_path}
     codespell {[vars]all_path}
@@ -62,11 +46,9 @@ commands =
 
 [testenv:unit]
 description = Run unit tests
-deps =
-    pytest
-    coverage[toml]
-    ops[testing]
-    -r {tox_root}/requirements.txt
+dependency_groups =
+    unit
+    charmlibs
 commands =
     coverage run --source={[vars]src_path} \
                  -m pytest \
@@ -79,29 +61,22 @@ commands =
 
 [testenv:coverage-report]
 description = Create test coverage report
-deps =
-    pytest
-    coverage[toml]
-    ops[testing]
-    -r {tox_root}/requirements.txt
+dependency_groups = coverage-report
 commands =
     coverage report
 
 [testenv:static]
 description = Run static type checks
-deps =
-    pyright
-    ops[testing]
-    -r {tox_root}/requirements.txt
+dependency_groups =
+    static
+    charmlibs
 commands =
     pyright {posargs}
 
 [testenv:integration]
 description = Run integration tests
-deps =
-    pytest
-    jubilant~=1.0
-    -r {tox_root}/requirements.txt
+dependency_groups =
+    integration
 commands =
     pytest -v \
            -s \