update release notes

add test
PyPSA · Jul 25, 2023 · 13e4cd5 · 13e4cd5
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diff --git a/doc/release_notes.rst b/doc/release_notes.rst
@@ -1,8 +1,10 @@
 Release Notes
 =============
 
-.. Upcoming Release
-.. ----------------
+Upcoming Release
+----------------
+
+* When multiplying a `LinearExpression` with a constant value, the constant in the `LinearExpression` was not updated. This is fixed now.
 
 Version 0.2.1
 -------------

diff --git a/test/test_linear_expression.py b/test/test_linear_expression.py
@@ -446,6 +446,14 @@ def test_linear_expression_groupby_with_series_false(v):
         grouped = expr.groupby(groups).sum()
 
 
+def test_linear_expression_groupby_with_series_false(v):
+    expr = 1 * v
+    groups = pd.Series([1] * 10 + [2] * 10, index=v.indexes["dim_2"])
+    groups.name = "dim_2"
+    with pytest.raises(ValueError):
+        grouped = expr.groupby(groups).sum()
+
+
 def test_linear_expression_groupby_with_dataframe(v):
     expr = 1 * v
     groups = pd.DataFrame(