test: cover the validator, the directory and the site

tests/test_site.py

@@ -0,0 +1,35 @@
+"""The project's own pages. Every one of them has to follow the spec."""
+
+from pathlib import Path
+import subprocess
+import sys
+
+import pytest
+
+from mews.lint import validate_file
+
+ROOT = Path(__file__).resolve().parent.parent
+PAGES = [*sorted((ROOT / "site").glob("*.html")), ROOT / "sample" / "sample.html"]
+
+
+@pytest.mark.parametrize("page", PAGES, ids=lambda p: p.name)
+def test_the_projects_own_pages_conform(page):
+    report = validate_file(str(page))
+    assert report.conforms, "\n".join(str(f) for f in report.failures)
+
+
+@pytest.mark.parametrize("page", PAGES, ids=lambda p: p.name)
+def test_the_projects_own_pages_have_no_warnings_either(page):
+    report = validate_file(str(page))
+    assert not report.warnings, "\n".join(str(f) for f in report.warnings)
+
+
+def test_the_dtd_still_matches_the_spec():
+    """dtd/check_dtd.py is hand-maintained; keep it running in CI."""
+    result = subprocess.run(
+        [sys.executable, str(ROOT / "dtd" / "check_dtd.py")],
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+    assert result.returncode == 0, result.stderr