The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/storage/test/unit/test_cache_size.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,72 @@
     1.4 +/* Any copyright is dedicated to the Public Domain.
     1.5 +   http://creativecommons.org/publicdomain/zero/1.0/ */
     1.6 +
     1.7 +// This file tests that dbs of various page sizes are using the right cache
     1.8 +// size (bug 703113).
     1.9 +
    1.10 +/**
    1.11 + * In order to change the cache size, we must open a DB, change the page
    1.12 + * size, create a table, close the DB, then re-open the DB.  We then check
    1.13 + * the cache size after reopening.
    1.14 + *
    1.15 + * @param dbOpener
    1.16 + *        function that opens the DB specified in file
    1.17 + * @param file
    1.18 + *        file holding the database
    1.19 + * @param pageSize
    1.20 + *        the DB's page size
    1.21 + * @param expectedCacheSize
    1.22 + *        the expected cache size for the given page size
    1.23 + */
    1.24 +function check_size(dbOpener, file, pageSize, expectedCacheSize)
    1.25 +{
    1.26 +  // Open the DB, immediately change its page size.
    1.27 +  let db = dbOpener(file);
    1.28 +  db.executeSimpleSQL("PRAGMA page_size = " + pageSize);
    1.29 +
    1.30 +  // Check the page size change worked.
    1.31 +  let stmt = db.createStatement("PRAGMA page_size");
    1.32 +  do_check_true(stmt.executeStep());
    1.33 +  do_check_eq(stmt.row.page_size, pageSize);
    1.34 +  stmt.finalize();
    1.35 +
    1.36 +  // Create a simple table.
    1.37 +  db.executeSimpleSQL("CREATE TABLE test ( id INTEGER PRIMARY KEY )");
    1.38 +
    1.39 +  // Close and re-open the DB.
    1.40 +  db.close();
    1.41 +  db = dbOpener(file);
    1.42 +
    1.43 +  // Check cache size is as expected.
    1.44 +  let stmt = db.createStatement("PRAGMA cache_size");
    1.45 +  do_check_true(stmt.executeStep());
    1.46 +  do_check_eq(stmt.row.cache_size, expectedCacheSize);
    1.47 +  stmt.finalize();
    1.48 +}
    1.49 +
    1.50 +function new_file(name)
    1.51 +{
    1.52 +  let file = dirSvc.get("ProfD", Ci.nsIFile);
    1.53 +  file.append(name + ".sqlite");
    1.54 +  do_check_false(file.exists());
    1.55 +  return file;
    1.56 +}
    1.57 +
    1.58 +function run_test()
    1.59 +{
    1.60 +  const kExpectedCacheSize = -2048; // 2MiB
    1.61 +
    1.62 +  let pageSizes = [
    1.63 +    1024,
    1.64 +    4096,
    1.65 +    32768,
    1.66 +  ];
    1.67 +
    1.68 +  for (let i = 0; i < pageSizes.length; i++) {
    1.69 +    let pageSize = pageSizes[i];
    1.70 +    check_size(getDatabase,
    1.71 +               new_file("shared" + pageSize), pageSize, kExpectedCacheSize);
    1.72 +    check_size(getService().openUnsharedDatabase,
    1.73 +               new_file("unshared" + pageSize), pageSize, kExpectedCacheSize);
    1.74 +  }
    1.75 +}