Enhance tox.ini to test Pydantic 1 and 2

Author: hathawsh

tox.ini

@@ -1,22 +1,41 @@
 [tox]
 min_version = 4.0
-env_list = format, type, lint, py{3.9,3.10,3.11}
+env_list = format, test_pydantic1, test_pydantic2, type_pydantic1, type_pydantic2, lint, py{3.9,3.10,3.11}
 
 [gh-actions]
 python =
     3.9: py39
     3.10: py310
     3.11: py311, type, format, lint
 
-[testenv]
+[testenv:test_pydantic1]
 labels = core
 allowlist_externals = poetry
-commands_pre = poetry install --only main --only test --no-root --all-extras
+commands_pre =
+  poetry install --only main --only test --no-root --all-extras
+  poetry add pydantic^1
 commands = poetry run pytest -vv tests
 
-[testenv:type]
+[testenv:test_pydantic2]
+labels = core
+allowlist_externals = poetry
+commands_pre =
+  poetry install --only main --only test --no-root --all-extras
+  poetry add 'pydantic==*'
+commands = poetry run pytest -vv tests
+
+[testenv:type_pydantic1]
+allowlist_externals = poetry
+commands_pre =
+  poetry install --no-root --all-extras
+  poetry add pydantic^1
+commands = poetry run mypy openapi_pydantic tests
+
+[testenv:type_pydantic2]
 allowlist_externals = poetry
-commands_pre = poetry install --no-root --all-extras
+commands_pre =
+  poetry install --no-root --all-extras
+  poetry add 'pydantic==*'
 commands = poetry run mypy openapi_pydantic tests
 
 [testenv:format]