1 files changed, 91 insertions, 0 deletions
diff --git a/dom/localstorage/test/unit/test_eviction.js b/dom/localstorage/test/unit/test_eviction.js
new file mode 100644
index 0000000000..d8c10b771f
--- /dev/null
+++ b/dom/localstorage/test/unit/test_eviction.js
@@ -0,0 +1,91 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+add_task(async function testSteps() {
+  const globalLimitKB = 5 * 1024;
+
+  const data = {};
+  data.sizeKB = 1 * 1024;
+  data.key = "A";
+  data.value = repeatChar(data.sizeKB * 1024 - data.key.length, ".");
+  data.urlCount = globalLimitKB / data.sizeKB;
+
+  function getSpec(index) {
+    return "http://example" + index + ".com";
+  }
+
+  info("Setting prefs");
+
+  Services.prefs.setBoolPref(
+    "dom.storage.enable_unsupported_legacy_implementation",
+    false
+  );
+  Services.prefs.setBoolPref("dom.storage.snapshot_reusing", false);
+
+  info("Setting limits");
+
+  setGlobalLimit(globalLimitKB);
+
+  let request = clear();
+  await requestFinished(request);
+
+  info("Getting storages");
+
+  let storages = [];
+  for (let i = 0; i < data.urlCount; i++) {
+    let storage = getLocalStorage(getPrincipal(getSpec(i)));
+    storages.push(storage);
+  }
+
+  info("Filling up entire default storage");
+
+  for (let i = 0; i < data.urlCount; i++) {
+    storages[i].setItem(data.key, data.value);
+    await returnToEventLoop();
+  }
+
+  info("Verifying no more data can be written");
+
+  for (let i = 0; i < data.urlCount; i++) {
+    try {
+      storages[i].setItem("B", "");
+      ok(false, "Should have thrown");
+    } catch (ex) {
+      ok(true, "Did throw");
+      ok(DOMException.isInstance(ex), "Threw DOMException");
+      is(ex.name, "QuotaExceededError", "Threw right DOMException");
+      is(ex.code, NS_ERROR_DOM_QUOTA_EXCEEDED_ERR, "Threw with right code");
+    }
+  }
+
+  info("Closing first origin");
+
+  storages[0].close();
+
+  let principal = getPrincipal("http://example0.com");
+
+  request = resetOrigin(principal);
+  await requestFinished(request);
+
+  info("Getting usage for first origin");
+
+  request = getOriginUsage(principal);
+  await requestFinished(request);
+
+  is(request.result.usage, data.sizeKB * 1024, "Correct usage");
+
+  info("Verifying more data data can be written");
+
+  for (let i = 1; i < data.urlCount; i++) {
+    storages[i].setItem("B", "");
+  }
+
+  info("Getting usage for first origin");
+
+  request = getOriginUsage(principal);
+  await requestFinished(request);
+
+  is(request.result.usage, 0, "Zero usage");
+});