feat: initialize data-layer project skeleton

tests/test_store.py

@@ -0,0 +1,57 @@
+from datetime import UTC, datetime
+
+from lmpm.data.store import add_experiment, add_material, init_db, list_experiments
+from lmpm.domain.experiment import ExperimentRecord, ProcessingParams, QualityMetrics
+from lmpm.domain.material import MaterialProperty
+
+
+def material_property():
+    return MaterialProperty(
+        material_id="acrylic-001",
+        name="Clear Acrylic",
+        category="polymer",
+        reflectivity=0.08,
+        absorptivity=0.92,
+        melting_point_c=160.0,
+        thermal_conductivity_w_m_k=0.19,
+        density_g_cm3=1.18,
+        roughness_um=1.2,
+    )
+
+
+def prepare_database(tmp_path):
+    database_path = tmp_path / "lemdb.db"
+    material = material_property()
+    init_db(database_path)
+    add_material(database_path, material)
+    return database_path, material
+
+
+def test_init_db_creates_readable_tables(tmp_path):
+    database_path, _ = prepare_database(tmp_path)
+
+    assert database_path.exists()
+
+
+def test_experiment_round_trip_through_sqlite(tmp_path):
+    database_path, _ = prepare_database(tmp_path)
+    experiment = ExperimentRecord(
+        experiment_id=None,
+        material_id="acrylic-001",
+        params=ProcessingParams(
+            power_percent=45,
+            scan_speed_mm_s=80,
+            pulse_frequency_hz=20,
+        ),
+        metrics=QualityMetrics(kerf_width_mm=0.18),
+        recorded_at=datetime.now(UTC),
+    )
+
+    experiment_id = add_experiment(database_path, experiment)
+    stored = list_experiments(database_path)
+
+    assert experiment_id == 1
+    assert len(stored) == 1
+    assert stored[0].material_id == "acrylic-001"
+    assert stored[0].params == experiment.params
+    assert stored[0].metrics == experiment.metrics