tests(fixtures): provide JSON/YAML syrupy snapshot fixtures

Author: tony

tests/conftest.py

@@ -0,0 +1,27 @@
+"""Shared pytest fixtures for snapshot testing."""
+
+from __future__ import annotations
+
+import pytest
+from syrupy.assertion import SnapshotAssertion
+from syrupy.extensions.json import JSONSnapshotExtension
+from syrupy.extensions.single_file import SingleFileSnapshotExtension, WriteMode
+
+
+class YamlSnapshotExtension(SingleFileSnapshotExtension):
+    """Snapshot extension that persists plain-text YAML files."""
+
+    file_extension = "yaml"
+    _write_mode = WriteMode.TEXT
+
+
+@pytest.fixture
+def snapshot_json(snapshot: SnapshotAssertion) -> SnapshotAssertion:
+    """JSON-formatted snapshot assertions."""
+    return snapshot.with_defaults(extension_class=JSONSnapshotExtension)
+
+
+@pytest.fixture
+def snapshot_yaml(snapshot: SnapshotAssertion) -> SnapshotAssertion:
+    """YAML-formatted snapshot assertions."""
+    return snapshot.with_defaults(extension_class=YamlSnapshotExtension)