tests/snapshot_scroll_arena_test.c


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/* Include snapshot.c to inspect its private arena accounting. The static
 * library supplies the terminal implementation; this translation unit's
 * snapshot symbols satisfy the test's references before the archive is read.
 */
#include <assert.h>
#include "../src/snapshot.c"

int main(void)
{
    struct term_options options = { .size = { 8, 24 }, .scrollback = 5 };
    struct term *t = term_new(&options);
    struct term_snapshot *s = term_snapshot_new();
    assert(t && s && term_snapshot_update(s, t));

    const char line[] = "e\xcc\x81\r\n";
    for (int i = 0; i < 10000; i++) {
        term_feed(t, line, sizeof(line) - 1, 0);
        assert(term_snapshot_update(s, t));
    }

    /* A fixed viewport holds fewer than 24 * 8 cluster records at once.
     * Dead records are compacted before they can dominate this arena. */
    assert(term_history_rows(t) == 5);
    assert(s->arena_len < 8192);

    term_snapshot_free(s);
    term_free(t);
    return 0;
}