tests: add tests for config

test/mv_web/live/global_settings_live_test.exs

@@ -687,5 +687,42 @@ defmodule MvWeb.GlobalSettingsLiveTest do
       # Check that file input has accept attribute for CSV
       assert html =~ ~r/accept=["'][^"']*csv["']/i or html =~ "CSV files only"
     end
+
+    test "configured row limit is enforced", %{conn: conn} do
+      # Business rule: CSV import respects configured row limits
+      # Test that a custom limit (500) is enforced, not just the default (1000)
+      original_config = Application.get_env(:mv, :csv_import, [])
+
+      try do
+        Application.put_env(:mv, :csv_import, [max_rows: 500])
+
+        {:ok, view, _html} = live(conn, ~p"/settings")
+
+        # Generate CSV with 501 rows (exceeding custom limit of 500)
+        header = "first_name;last_name;email;street;postal_code;city\n"
+
+        rows =
+          for i <- 1..501 do
+            "Row#{i};Last#{i};email#{i}@example.com;Street#{i};12345;City#{i}\n"
+          end
+
+        large_csv = header <> Enum.join(rows)
+
+        # Simulate file upload using helper function
+        upload_csv_file(view, large_csv, "too_many_rows_custom.csv")
+
+        view
+        |> form("#csv-upload-form", %{})
+        |> render_submit()
+
+        html = render(view)
+        # Business rule: import should be rejected when exceeding configured limit
+        assert html =~ "exceeds" or html =~ "maximum" or html =~ "limit" or
+                 html =~ "Failed to prepare"
+      after
+        # Restore original config
+        Application.put_env(:mv, :csv_import, original_config)
+      end
+    end
   end
 end