tests: fix tox min job (#870)

* tests: fix tox min job

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* tests: pytest-cov -> coverage conversion

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* Revert "tests: pytest-cov -> coverage conversion"

This reverts commit 54a336f.

* tests: avoid error if only a single run was run

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

---------

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

Author: henryiii

pyproject.toml

@@ -63,6 +63,7 @@ test = [
   'setuptools >= 56.0.0; python_version == "3.10"',
   'setuptools >= 56.0.0; python_version == "3.11"',
   'setuptools >= 67.8.0; python_version >= "3.12"',
+  "setuptools_scm >= 6",
 ]
 typing = [
   "build[uv]",

tests/conftest.py

@@ -78,6 +78,12 @@ def local_pip(monkeypatch):
     monkeypatch.setattr(build.env._PipBackend, '_has_valid_outer_pip', None)
 
 
+@pytest.fixture(autouse=True)
+def avoid_constraints(monkeypatch):
+    monkeypatch.delenv('PIP_CONSTRAINT', raising=False)
+    monkeypatch.delenv('UV_CONSTRAINT', raising=False)
+
+
 @pytest.fixture(autouse=True, params=[False])
 def has_virtualenv(request, monkeypatch):
     if request.param is not None:

tests/constraints.txt

@@ -1,10 +1,12 @@
 importlib-metadata==4.6
-packaging==19.1
+packaging==20.0; python_version < "3.12"
+packaging==19.1; python_version >= "3.12"
 pyproject_hooks==1.0
 setuptools==42.0.0; python_version < "3.10"
 setuptools==56.0.0; python_version == "3.10"
 setuptools==56.0.0; python_version == "3.11"
 setuptools==67.8.0; python_version >= "3.12"
+setuptools_scm==6.3.1; python_version < "3.12"
 tomli==1.1.0
 # virtualenv==20.0.35
 wheel==0.36.0

tox.ini

@@ -13,6 +13,8 @@ skip_missing_interpreters = true
 [testenv]
 description =
     run test suite with {basepython}
+deps =
+    pip
 extras =
     test
 pass_env =
@@ -71,9 +73,9 @@ commands_pre =
 
 [testenv:{py313, py312, py311, py310, py39, py38, pypy38, pypy39, pypy310}-min]
 description = check minimum versions required of all dependencies
-skip_install = true
-commands_pre =
-    pip install .[test] -c tests/constraints.txt
+set_env =
+    PIP_CONSTRAINT = {toxinidir}/tests/constraints.txt
+    UV_CONSTRAINT = {toxinidir}/tests/constraints.txt
 
 [testenv:dev]
 description = generate a DEV environment
@@ -98,7 +100,7 @@ pass_env =
     DIFF_AGAINST
 set_env =
 commands =
-    coverage combine {toxworkdir}
+    - coverage combine {toxworkdir}
     coverage report --skip-covered --show-missing -i
     coverage xml -o {toxworkdir}/coverage.xml -i
     coverage html -d {toxworkdir}/htmlcov -i