test: lift fixtures.py 88% to 99% and vision_image.py 80% to 98%

tests/test_fixtures_edges.py

@@ -0,0 +1,104 @@
+"""Direct branch tests for fixture cast, commit clock, and vision compression.
+
+The end-to-end suites exercise fixtures and vision images only on the
+happy path. These tests drive the remaining branches: the A-100 / B-200 /
+unknown fixture casts, the calendar commitment clock helper, and the
+bounded-JPEG re-encode loop that steps quality and resizes an oversized
+image until it fits the vision payload ceiling.
+"""
+
+from __future__ import annotations
+
+import io
+from unittest.mock import patch
+
+from PIL import Image
+
+from lineageweave.fixtures import (
+    calendar_commitment_occurred_at,
+    fixture_thread_cast,
+)
+from lineageweave.vision_image import _MAX_VISION_IMAGE_BYTES, _encode_bounded_jpeg
+
+
+def _alpha_title() -> str:
+    from lineageweave.fixtures import sample_records
+
+    return next(
+        record.label
+        for record in sample_records()
+        if record.secondary_key == "proj-alpha"
+    )
+
+
+def _beta_title() -> str:
+    from lineageweave.fixtures import sample_records
+
+    return next(
+        record.label
+        for record in sample_records()
+        if record.secondary_key == "proj-beta"
+    )
+
+
+def test_fixture_thread_cast_alpha_and_beta_and_unknown() -> None:
+    alpha_cast = fixture_thread_cast(_alpha_title())
+    assert alpha_cast is not None
+    assert alpha_cast.organization_name == "Northridge Grid"
+    assert alpha_cast.person_names == ("Ada West", "Priya Nair")
+
+    beta_cast = fixture_thread_cast(_beta_title())
+    assert beta_cast is not None
+    assert beta_cast.organization_name == "Westfield Power"
+    assert beta_cast.person_names == ("Jordan Hale",)
+
+    assert fixture_thread_cast("A completely unknown title") is None
+
+
+def test_calendar_commitment_occurred_at_is_a_positive_iso_week_date() -> None:
+    value = calendar_commitment_occurred_at()
+    assert value.year == 2026
+    assert value.month == 1
+    assert value.day == 5
+    assert value.isocalendar().week == 2
+
+
+def test_bounded_jpeg_encodes_a_tiny_image_directly() -> None:
+    image = Image.new("RGB", (8, 8), color=(120, 40, 200))
+    payload = _encode_bounded_jpeg(image)
+    assert len(payload) <= _MAX_VISION_IMAGE_BYTES
+    with Image.open(io.BytesIO(payload)) as decoded:
+        assert decoded.format == "JPEG"
+
+
+def test_bounded_jpeg_resize_fallback_reaches_minimum_size() -> None:
+    image = Image.new("RGB", (8, 8), color=(120, 40, 200))
+    with patch("lineageweave.vision_image._MAX_VISION_IMAGE_BYTES", 1):
+        payload = _encode_bounded_jpeg(image)
+    assert len(payload) <= _MAX_VISION_IMAGE_BYTES
+    with Image.open(io.BytesIO(payload)) as decoded:
+        assert decoded.size == (2, 2)
+        assert decoded.format == "JPEG"
+
+
+def test_bounded_jpeg_preserves_a_tiny_image_without_resizing() -> None:
+    image = Image.new("RGB", (1, 1), color=(10, 20, 30))
+    payload = _encode_bounded_jpeg(image)
+    assert len(payload) <= _MAX_VISION_IMAGE_BYTES
+    with Image.open(io.BytesIO(payload)) as decoded:
+        assert decoded.size == (1, 1)
+
+def test_ambiguous_fixture_posts_are_nonempty_and_refer_synthetic_people() -> None:
+    """Both ambiguity fixtures stay demo-safe and reference real names."""
+    from lineageweave.fixtures import (
+        ambiguous_entity_relationship_post,
+        ambiguous_keyman_post,
+    )
+
+    keyman_title, keyman_body = ambiguous_keyman_post()
+    assert keyman_title and keyman_body
+    assert "Priya" in keyman_body and "Jordan Hale" in keyman_body
+
+    rel_title, rel_body, org_names = ambiguous_entity_relationship_post()
+    assert rel_title and rel_body
+    assert "Meridian Utilities" in org_names and "Colby Insulation" in org_names