Add pytest coverage for length, between, uuid, MAC, IBAN, cron, encodings and card brands (220 tests)

Add logic to make the 'validators' package importable from various locations.

Author: wxs-lang

tests/conftest.py

@@ -0,0 +1,19 @@
+"""Make the ``validators`` package importable without an install.
+
+Tries, in order: the src-layout of a checked-out repo (``../src``),
+this workdir's ``../validators-src/src`` clone, and the repo root itself.
+Only directories that actually contain the ``validators`` package are added.
+"""
+
+import os
+import sys
+
+_HERE = os.path.dirname(os.path.abspath(__file__))
+_CANDIDATES = (
+    os.path.join(_HERE, "..", "src"),
+    os.path.join(_HERE, "..", "validators-src", "src"),
+    os.path.join(_HERE, ".."),
+)
+for _candidate in _CANDIDATES:
+    if os.path.isdir(os.path.join(_candidate, "validators")):
+        sys.path.insert(0, os.path.normpath(_candidate))