tests: avoid error if only a single run was run

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

@@ -80,8 +80,8 @@ def local_pip(monkeypatch):
 
 @pytest.fixture(autouse=True)
 def avoid_constraints(monkeypatch):
-    monkeypatch.delenv("PIP_CONSTRAINT", raising=False)
-    monkeypatch.delenv("UV_CONSTRAINT", raising=False)
+    monkeypatch.delenv('PIP_CONSTRAINT', raising=False)
+    monkeypatch.delenv('UV_CONSTRAINT', raising=False)
 
 
 @pytest.fixture(autouse=True, params=[False])

tests/constraints.txt

@@ -5,6 +5,7 @@ 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==6.3.2; python_version < "3.12"
 tomli==1.1.0
 # virtualenv==20.0.35
 wheel==0.36.0

tox.ini

@@ -100,7 +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