From a270b2140891f24cf0d077f7cb72d6a87ee1b42b Mon Sep 17 00:00:00 2001
From: Max Ghenis <mghenis@gmail.com>
Date: Tue, 7 Jul 2026 07:06:10 -0400
Subject: [PATCH] Add wrapper regression test for local dataset paths

Locks in the #415 behavior delivered by #442: a plain local file path
with allow_unmanaged=True reaches Microsimulation unchanged and the
provenance bundle records it.

Fixes #415

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 changelog.d/415.fixed.md        |  1 +
 tests/test_release_manifests.py | 35 +++++++++++++++++++++++++++++++++
 uv.lock                         |  2 +-
 3 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 changelog.d/415.fixed.md

diff --git a/changelog.d/415.fixed.md b/changelog.d/415.fixed.md
new file mode 100644
index 00000000..0d59518c
--- /dev/null
+++ b/changelog.d/415.fixed.md
@@ -0,0 +1 @@
+Add a full-wrapper regression test covering `managed_microsimulation` with a plain local dataset path and `allow_unmanaged=True` (the #415 scenario, resolved by #442).
diff --git a/tests/test_release_manifests.py b/tests/test_release_manifests.py
index db5a1295..9872328d 100644
--- a/tests/test_release_manifests.py
+++ b/tests/test_release_manifests.py
@@ -912,6 +912,41 @@ def test__given_us_unmanaged_dataset_uri__then_source_is_not_rewritten(self):
             "/tmp/cps_2023.h5"
         )
 
+    def test__given_us_unmanaged_local_path__then_dataset_reaches_microsimulation(
+        self, tmp_path
+    ):
+        dataset_path = tmp_path / "local_build_2100.h5"
+        dataset_path.write_bytes(b"not a real h5; source plumbing only")
+
+        mock_microsimulation = MagicMock()
+        with (
+            patch.dict(
+                sys.modules,
+                _country_modules_with_microsimulation(
+                    "policyengine_us",
+                    mock_microsimulation,
+                ),
+            ),
+            patch(
+                "policyengine.tax_benefit_models.common.model_version.certify_data_release_compatibility",
+                return_value=get_release_manifest("us").certification,
+            ),
+        ):
+            us_model = importlib.import_module(
+                "policyengine.tax_benefit_models.us.model"
+            )
+            microsim = us_model.managed_microsimulation(
+                dataset=str(dataset_path),
+                allow_unmanaged=True,
+            )
+
+        assert mock_microsimulation.call_args.kwargs["dataset"] == str(dataset_path)
+        assert microsim.policyengine_bundle["runtime_dataset"] == "local_build_2100"
+        assert microsim.policyengine_bundle["runtime_dataset_uri"] == str(dataset_path)
+        assert microsim.policyengine_bundle["runtime_dataset_source"] == str(
+            dataset_path
+        )
+
     def test__given_uk_managed_dataset_name__then_resolves_within_bundle(self):
         mock_microsimulation = MagicMock()
         with (
diff --git a/uv.lock b/uv.lock
index 5cf26e02..dd39bb1b 100644
--- a/uv.lock
+++ b/uv.lock
@@ -2820,7 +2820,7 @@ wheels = [
 
 [[package]]
 name = "policyengine"
-version = "4.18.7"
+version = "4.18.10"
 source = { editable = "." }
 dependencies = [
     { name = "diskcache" },