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terminal: pagelist verify erasing history resets to one page

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This commit is contained in:
Mitchell Hashimoto
2024-03-09 14:39:04 -08:00
parent 7c7e611192
commit ae19a424fc
1 changed files with 18 additions and 0 deletions
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18
src/terminal/PageList.zig
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@ -1991,6 +1991,18 @@ fn totalRows(self: *const PageList) usize {
return rows; return rows;
} }
/// The total number of pages in this list.
fn totalPages(self: *const PageList) usize {
var pages: usize = 0;
var page = self.pages.first;
while (page) |p| {
pages += 1;
page = p.next;
}
return pages;
}
/// Grow the number of rows available in the page list by n. /// Grow the number of rows available in the page list by n.
/// This is only used for testing so it isn't optimized. /// This is only used for testing so it isn't optimized.
fn growRows(self: *PageList, n: usize) !void { fn growRows(self: *PageList, n: usize) !void {
@ -3054,12 +3066,14 @@ test "PageList erase" {
var s = try init(alloc, 80, 24, null); var s = try init(alloc, 80, 24, null);
defer s.deinit(); defer s.deinit();
try testing.expectEqual(@as(usize, 1), s.totalPages());
// Grow so we take up at least 5 pages. // Grow so we take up at least 5 pages.
const page = &s.pages.last.?.data; const page = &s.pages.last.?.data;
for (0..page.capacity.rows * 5) |_| { for (0..page.capacity.rows * 5) |_| {
_ = try s.grow(); _ = try s.grow();
} }
try testing.expectEqual(@as(usize, 6), s.totalPages());
// Our total rows should be large // Our total rows should be large
try testing.expect(s.totalRows() > s.rows); try testing.expect(s.totalRows() > s.rows);
@ -3067,6 +3081,10 @@ test "PageList erase" {
// Erase the entire history, we should be back to just our active set. // Erase the entire history, we should be back to just our active set.
s.eraseRows(.{ .history = .{} }, null); s.eraseRows(.{ .history = .{} }, null);
try testing.expectEqual(s.rows, s.totalRows()); try testing.expectEqual(s.rows, s.totalRows());
// We should be back to just one page
try testing.expectEqual(@as(usize, 1), s.totalPages());
try testing.expect(s.pages.first == s.pages.last);
} }
test "PageList erase row with tracked pin resets to top-left" { test "PageList erase row with tracked pin resets to top-left" {