Test that save parameters internalize DataFrame parameters in the sto…

…rage

tests/ert/unit_tests/test_libres_facade.py

@@ -2,12 +2,15 @@
 from datetime import datetime, timedelta
 from textwrap import dedent
 
+import numpy as np
 import pytest
+from pandas import ExcelWriter
 from pandas.core.frame import DataFrame
 from resdata.summary import Summary
 
 from ert.config import ErtConfig
-from ert.enkf_main import sample_prior
+from ert.config.design_matrix import DESIGN_MATRIX_GROUP, DesignMatrix
+from ert.enkf_main import sample_prior, save_design_matrix_to_ensemble
 from ert.libres_facade import LibresFacade
 from ert.storage import open_storage
 
@@ -241,3 +244,34 @@ def test_load_gen_kw_not_sorted(storage, tmpdir, snapshot):
 
         data = ensemble.load_all_gen_kw_data()
         snapshot.assert_match(data.round(12).to_csv(), "gen_kw_unsorted")
+
+
+def test_save_parameters_to_storage_from_design_dataframe(tmp_path):
+    design_path = tmp_path / "design_matrix.xlsx"
+    a_values = [1, 2, 3]
+    b_values = [4, 5, 6]
+    c_values = [7, 8, 9]
+    design_matrix_df = DataFrame({"a": a_values, "b": b_values, "c": c_values})
+    with ExcelWriter(design_path) as xl_write:
+        design_matrix_df.to_excel(xl_write, index=False, sheet_name="DesignSheet01")
+        DataFrame().to_excel(
+            xl_write, index=False, sheet_name="DefaultValues", header=False
+        )
+    design_matrix = DesignMatrix(design_path, "DesignSheet01", "DefaultValues")
+    design_matrix.read_design_matrix()
+    with open_storage(tmp_path / "storage", mode="w") as storage:
+        experiment_id = storage.create_experiment(
+            parameters=[design_matrix.parameter_configuration[DESIGN_MATRIX_GROUP]]
+        )
+        ensemble_size = 3
+        ensemble = storage.create_ensemble(
+            experiment_id, name="default", ensemble_size=ensemble_size
+        )
+        save_design_matrix_to_ensemble(
+            design_matrix.design_matrix_df, ensemble, [0, 1, 2]
+        )
+        params = ensemble.load_parameters("DESIGN_MATRIX")["values"]
+        all(params.names.values == ["a", "b", "c"])
+        np.testing.assert_array_equal(params[:, 0], a_values)
+        np.testing.assert_array_equal(params[:, 1], b_values)
+        np.testing.assert_array_equal(params[:, 2], c_values)