Ignores phantom-types for python3.7

Author: sobolevn

CHANGELOG.md

@@ -15,6 +15,7 @@ We follow Semantic Versions since the `0.1.0` release.
 
 - Fixes that types referenced in multiple typeclasses
   were not handling `Supports` properly #249
+- Fixes typing bug with `ABC` and mutable typeclass signature #259
 
 
 ## Version 0.3.0

docs/conftest.py

@@ -0,0 +1,32 @@
+import sys
+from pathlib import Path
+from types import MappingProxyType
+
+from typing_extensions import Final
+
+PYTHON_VERSION: Final = (sys.version_info.major, sys.version_info.minor)
+ENABLE_SINCE: Final = MappingProxyType({
+    (3, 8): frozenset((
+        Path('docs/pages/concept.rst'),
+    )),
+})
+PATHS_TO_IGNORE_NOW: Final = frozenset(
+    path.absolute()
+    for since_python, to_ignore in ENABLE_SINCE.items()
+    for path in to_ignore
+    if PYTHON_VERSION < since_python
+)
+
+
+# TODO: remove after `phantom-types` release with `python3.7` support
+def pytest_collection_modifyitems(items) -> None:  # noqa: WPS110
+    """Conditionally removes some collected docstests."""
+    to_ignore_items = []
+    for test_item in items:
+        if not getattr(test_item, 'dtest', None):
+            continue
+        if Path(test_item.dtest.filename) in PATHS_TO_IGNORE_NOW:
+            to_ignore_items.append(test_item)
+
+    for to_ignore in to_ignore_items:
+        items.remove(to_ignore)