UPDATE: Dump of initial files

base/src/test/test_frozen_rows_columns.rs

@@ -0,0 +1,54 @@
+#![allow(clippy::unwrap_used)]
+
+use crate::constants::{LAST_COLUMN, LAST_ROW};
+use crate::test::util::new_empty_model;
+
+#[test]
+fn test_empty_model() {
+    let mut model = new_empty_model();
+    let worksheet = model.workbook.worksheet_mut(0).unwrap();
+    assert_eq!(worksheet.frozen_rows, 0);
+    assert_eq!(worksheet.frozen_columns, 0);
+
+    let e = worksheet.set_frozen_rows(3);
+    assert!(e.is_ok());
+    assert_eq!(worksheet.frozen_rows, 3);
+    assert_eq!(worksheet.frozen_columns, 0);
+
+    let e = worksheet.set_frozen_columns(53);
+    assert!(e.is_ok());
+    assert_eq!(worksheet.frozen_rows, 3);
+    assert_eq!(worksheet.frozen_columns, 53);
+
+    // Set them back to zero
+    let e = worksheet.set_frozen_rows(0);
+    assert!(e.is_ok());
+    let e = worksheet.set_frozen_columns(0);
+    assert!(e.is_ok());
+    assert_eq!(worksheet.frozen_rows, 0);
+    assert_eq!(worksheet.frozen_columns, 0);
+}
+
+#[test]
+fn test_invalid_rows_columns() {
+    let mut model = new_empty_model();
+    let worksheet = model.workbook.worksheet_mut(0).unwrap();
+
+    assert_eq!(
+        worksheet.set_frozen_rows(-3),
+        Err("Frozen rows cannot be negative".to_string())
+    );
+    assert_eq!(
+        worksheet.set_frozen_columns(-5),
+        Err("Frozen columns cannot be negative".to_string())
+    );
+
+    assert_eq!(
+        worksheet.set_frozen_rows(LAST_ROW),
+        Err("Too many rows".to_string())
+    );
+    assert_eq!(
+        worksheet.set_frozen_columns(LAST_COLUMN),
+        Err("Too many columns".to_string())
+    );
+}