Convert test and dev dependencies to groups

- test dependencies are organized into per-framework groups, and then
  aggregated in a `test-all-frameworks` group -- which is still used in
  tox in order to keep test times down
- dev dependencies are moved to a dedicated group as well
- the 'setuptools' pin for pyramid is moved into the pyramid test group

Author: sirosen

pyproject.toml

@@ -55,27 +55,6 @@ Issues = "https://github.com/marshmallow-code/webargs/issues"
 Source = "https://github.com/marshmallow-code/webargs"
 Tidelift = "https://tidelift.com/subscription/pkg/pypi-webargs?utm_source=pypi-webargs&utm_medium=pypi"
 
-[project.optional-dependencies]
-frameworks = [
-  "Flask>=3.1.0",
-  "Django>=5.2.0",
-  "bottle>=0.13.0",
-  "tornado>=6.5.0",
-  "pyramid>=2.0.2",
-  "falcon>=4.1.0",
-  "aiohttp>=3.13.0",
-]
-tests = [
-  "webargs[frameworks]",
-  "pytest",
-  "pytest-asyncio",
-  "webtest==3.0.7",
-  "webtest-aiohttp==2.0.0",
-  "pytest-aiohttp>=0.3.0",
-  "packaging>=17.0",
-]
-dev = ["webargs[tests]", "tox", "pre-commit>=3.5,<5.0"]
-
 [build-system]
 requires = ["flit_core<4"]
 build-backend = "flit_core.buildapi"
@@ -88,6 +67,43 @@ docs = [
   "furo==2025.12.19",
 ]
 
+tests = [
+  "pytest",
+  "pytest-asyncio",
+  "webtest==3.0.7",
+  "webtest-aiohttp==2.0.0",
+  "pytest-aiohttp>=0.3.0",
+  "packaging>=17.0",
+]
+test-flask = ["Flask>=3.1.0", {include-group = "tests"}]
+test-django = ["Django>=5.2.0", {include-group = "tests"}]
+test-bottle = ["bottle>=0.13.0", {include-group = "tests"}]
+test-tornado = ["tornado>=6.5.0", {include-group = "tests"}]
+test-pyramid = [
+    "pyramid>=2.0.2", {include-group = "tests"},
+    # temporary pin: hold back `setuptools` so that `pyramid` testing works
+    # pyramid uses pkg_resources, which has been long deprecated and finally removed
+    #
+    # see https://github.com/Pylons/pyramid/issues/3731 for discussion within pyramid
+    "setuptools < 82.0"
+]
+test-falcon = ["falcon>=4.1.0", {include-group = "tests"}]
+test-aiohttp = ["aiohttp>=3.13.0", {include-group = "tests"}]
+# for efficiency of testing, we define this group and test all frameworks at once, because it works
+# however, each is declared separately in case we ever encounter conflicts and need to break one off
+# from the rest of the group
+test-all-frameworks = [
+  {include-group = "test-flask"},
+  {include-group = "test-django"},
+  {include-group = "test-bottle"},
+  {include-group = "test-tornado"},
+  {include-group = "test-pyramid"},
+  {include-group = "test-falcon"},
+  {include-group = "test-aiohttp"},
+]
+
+dev = ["tox", "pre-commit>=3.5,<5.0", {include-group = "tests"}]
+
 [tool.flit.sdist]
 include = [
   "docs/",

tox.ini

@@ -7,7 +7,7 @@ envlist=
     docs
 
 [testenv]
-extras = tests
+dependency_groups = test-all-frameworks
 deps =
     marshmallow: marshmallow>=4.0.0,<5.0.0
     marshmallowdev: https://github.com/marshmallow-code/marshmallow/archive/dev.tar.gz
@@ -19,12 +19,6 @@ deps =
     lowest: falcon==4.1.0
     lowest: aiohttp==3.13.0
     lowest: marshmallow==3.13.0
-
-    # temporary pin: hold back `setuptools` so that `pyramid` testing works
-    # pyramid uses pkg_resources, which has been long deprecated and finally removed
-    #
-    # see https://github.com/Pylons/pyramid/issues/3731 for discussion within pyramid
-    setuptools < 82.0
 commands = pytest {posargs}
 
 [testenv:lint]