dom/quota/test/xpcshell/test_persist_eviction.js

   1 /**
   2  * Any copyright is dedicated to the Public Domain.
   3  * http://creativecommons.org/publicdomain/zero/1.0/
   4  */
   5
   6 /**
   7  * This test is mainly to verify that normally the oldest origin will be
   8  * evicted if the global limit is reached, but if the oldest origin is
   9  * persisted or is an extension origin, then it won't be evicted.
  10  */
  11
  12 loadScript("dom/quota/test/xpcshell/common/utils.js");
  13
  14 async function testSteps() {
  15   // The group limit is calculated as 20% of the global limit and the minimum
  16   // value of the group limit is 10 MB.
  17
  18   const groupLimitKB = 10 * 1024;
  19   const globalLimitKB = groupLimitKB * 5;
  20
  21   setGlobalLimit(globalLimitKB);
  22
  23   let request = clear();
  24   await requestFinished(request);
  25
  26   for (let persistOldestOrigin of [false, true]) {
  27     info(
  28       "Testing " +
  29         (persistOldestOrigin ? "with" : "without") +
  30         " persisting the oldest origin"
  31     );
  32
  33     info(
  34       "Step 0: Filling a moz-extension origin as the oldest origin with non-persisted data"
  35     );
  36
  37     // Just a fake moz-extension origin to mock an extension origin.
  38     let extUUID = "20445ca5-75f9-420e-a1d4-9cccccb5e891";
  39     let spec = `moz-extension://${extUUID}`;
  40     await fillOrigin(getPrincipal(spec), groupLimitKB * 1024);
  41
  42     info(
  43       "Step 1: Filling five separate web origins to reach the global limit " +
  44         "and trigger eviction"
  45     );
  46
  47     for (let index = 1; index <= 5; index++) {
  48       let spec = "http://example" + index + ".com";
  49       if (index == 1 && persistOldestOrigin) {
  50         request = persist(getPrincipal(spec));
  51         await requestFinished(request);
  52       }
  53       await fillOrigin(getPrincipal(spec), groupLimitKB * 1024);
  54     }
  55
  56     info("Step 2: Verifying origin directories");
  57
  58     for (let index = 1; index <= 5; index++) {
  59       let path = "storage/default/http+++example" + index + ".com";
  60       let file = getRelativeFile(path);
  61       if (index == (persistOldestOrigin ? 2 : 1)) {
  62         ok(!file.exists(), "The origin directory " + path + " doesn't exist");
  63
  64         let spec = "http://example" + index + ".com";
  65         request = initTemporaryOrigin("default", getPrincipal(spec));
  66         await requestFinished(request);
  67
  68         ok(file.exists(), "The origin directory " + path + " does exist");
  69       } else {
  70         ok(file.exists(), "The origin directory " + path + " does exist");
  71       }
  72     }
  73
  74     // Verify that the extension storage data has not been evicted (even if it wasn't marked as
  75     // persisted and it was the less recently used origin).
  76     let path = `storage/default/moz-extension+++${extUUID}`;
  77     let file = getRelativeFile(path);
  78     ok(file.exists(), "The origin directory " + path + "does exist");
  79
  80     request = clear();
  81     await requestFinished(request);
  82   }
  83
  84   resetGlobalLimit();
  85
  86   request = reset();
  87   await requestFinished(request);
  88 }