Tests: implement link checking of results

tests/test_nancy.py

@@ -58,7 +58,7 @@ def test_part_tree() -> None:
 def test_two_trees() -> None:
     with chdir(tests_dir):
         passing_test(["mergetrees-src", "webpage-src"], "mergetrees-expected")
-    check_links("mergetrees-expected", "index.html")
+        check_links("mergetrees-expected", "index.html")
 
 
 def test_nested_macro_invocations() -> None:

tests/testutils.py

@@ -8,6 +8,7 @@
 import io
 import os
 import sys
+import subprocess
 import re
 import filecmp
 import difflib
@@ -141,9 +142,4 @@ def failing_cli_test(
 
 
 def check_links(root: str, start: str) -> None:
-    pass
-    # FIXME
-    # results = check({"path": start, "serverRoot": root})
-    # if not results.passed:
-    #     warn(results)
-    # assert results.passed == "Broken links in output"
+    subprocess.check_call(["linkchecker", os.path.join(root, start)])

tox.ini

@@ -8,6 +8,7 @@ xfail_strict = True
 [testenv]
 deps =
     coverage
+    LinkChecker
     mypy
     pylint
     types-setuptools