exception coverage

narwhals-dev · Oct 7, 2024 · a202252 · a202252
1 parent 4aca3f2
commit a202252
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Showing 2 changed files with 11 additions and 1 deletion.
diff --git a/narwhals/expr.py b/narwhals/expr.py
@@ -4222,7 +4222,7 @@ def max_horizontal(*exprs: IntoExpr | Iterable[IntoExpr]) -> Expr:
         a: [[4,8,3]]
     """
     if not exprs:
-        msg = "At least one expression must be passed to `sum_horizontal`"
+        msg = "At least one expression must be passed to `max_horizontal`"
         raise ValueError(msg)
     return Expr(
         lambda plx: plx.max_horizontal(

diff --git a/tests/expr_and_series/all_horizontal_test.py b/tests/expr_and_series/all_horizontal_test.py
@@ -87,3 +87,13 @@ def test_horizontal_expressions_emtpy(constructor: Constructor) -> None:
         ValueError, match=r"At least one expression must be passed.*sum_horizontal"
     ):
         df.select(nw.sum_horizontal())
+
+    with pytest.raises(
+        ValueError, match=r"At least one expression must be passed.*max_horizontal"
+    ):
+        df.select(nw.max_horizontal())
+
+    with pytest.raises(
+        ValueError, match=r"At least one expression must be passed.*min_horizontal"
+    ):
+        df.select(nw.min_horizontal())