gecko/storage/test/unit/test_chunk_growth.js

51 lines
1.3 KiB
JavaScript

/* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/publicdomain/zero/1.0/
*/
// This file tests SQLITE_FCNTL_CHUNK_SIZE behaves as expected
function run_sql(d, sql) {
var stmt = d.createStatement(sql)
stmt.execute()
stmt.finalize();
}
function new_file(name)
{
var file = dirSvc.get("ProfD", Ci.nsIFile);
file.append(name);
return file;
}
function get_size(name) {
return new_file(name).fileSize
}
function run_test()
{
const filename = "chunked.sqlite";
const CHUNK_SIZE = 512 * 1024;
var d = getDatabase(new_file(filename));
d.setGrowthIncrement(CHUNK_SIZE, "");
run_sql(d, "CREATE TABLE bloat(data varchar)");
var orig_size = get_size(filename);
/* Dump in at least 32K worth of data.
* While writing ensure that the file size growth in chunksize set above.
*/
const str1024 = new Array(1024).join("T");
for(var i = 0; i < 32; i++) {
run_sql(d, "INSERT INTO bloat VALUES('" + str1024 + "')");
var size = get_size(filename)
// Must not grow in small increments.
do_check_true(size == orig_size || size >= CHUNK_SIZE);
}
/* In addition to growing in chunk-size increments, the db
* should shrink in chunk-size increments too.
*/
run_sql(d, "DELETE FROM bloat")
run_sql(d, "VACUUM")
do_check_true(get_size(filename) >= CHUNK_SIZE)
}