diff -r 000000000000 -r 6474c204b198 toolkit/components/crashes/tests/xpcshell/test_crash_store.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/crashes/tests/xpcshell/test_crash_store.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,231 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/*
+ * This file tests the CrashStore type in CrashManager.jsm.
+ */
+
+"use strict";
+
+const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
+
+let bsp = Cu.import("resource://gre/modules/CrashManager.jsm", this);
+Cu.import("resource://gre/modules/osfile.jsm", this);
+Cu.import("resource://gre/modules/Task.jsm", this);
+
+const CrashStore = bsp.CrashStore;
+
+let STORE_DIR_COUNT = 0;
+
+function getStore() {
+  return Task.spawn(function* () {
+    let storeDir = do_get_tempdir().path;
+    storeDir = OS.Path.join(storeDir, "store-" + STORE_DIR_COUNT++);
+
+    yield OS.File.makeDir(storeDir, {unixMode: OS.Constants.libc.S_IRWXU});
+
+    let s = new CrashStore(storeDir);
+    yield s.load();
+
+    return s;
+  });
+}
+
+function run_test() {
+  run_next_test();
+}
+
+add_task(function* test_constructor() {
+  let s = new CrashStore("/some/path");
+  Assert.ok(s instanceof CrashStore);
+});
+
+add_task(function test_add_crash() {
+  let s = yield getStore();
+
+  Assert.equal(s.crashesCount, 0);
+  let d = new Date(Date.now() - 5000);
+  s.addMainProcessCrash("id1", d);
+
+  Assert.equal(s.crashesCount, 1);
+
+  let crashes = s.crashes;
+  Assert.equal(crashes.length, 1);
+  let c = crashes[0];
+
+  Assert.equal(c.id, "id1", "ID set properly.");
+  Assert.equal(c.crashDate.getTime(), d.getTime(), "Date set.");
+
+  s.addMainProcessCrash("id2", new Date());
+  Assert.equal(s.crashesCount, 2);
+});
+
+add_task(function test_save_load() {
+  let s = yield getStore();
+
+  yield s.save();
+
+  let d1 = new Date();
+  let d2 = new Date(d1.getTime() - 10000);
+  s.addMainProcessCrash("id1", d1);
+  s.addMainProcessCrash("id2", d2);
+
+  yield s.save();
+
+  yield s.load();
+  Assert.ok(!s.corruptDate);
+  let crashes = s.crashes;
+
+  Assert.equal(crashes.length, 2);
+  let c = s.getCrash("id1");
+  Assert.equal(c.crashDate.getTime(), d1.getTime());
+});
+
+add_task(function test_corrupt_json() {
+  let s = yield getStore();
+
+  let buffer = new TextEncoder().encode("{bad: json-file");
+  yield OS.File.writeAtomic(s._storePath, buffer, {compression: "lz4"});
+
+  yield s.load();
+  Assert.ok(s.corruptDate, "Corrupt date is defined.");
+
+  let date = s.corruptDate;
+  yield s.save();
+  s._data = null;
+  yield s.load();
+  Assert.ok(s.corruptDate);
+  Assert.equal(date.getTime(), s.corruptDate.getTime());
+});
+
+add_task(function* test_add_main_crash() {
+  let s = yield getStore();
+
+  s.addMainProcessCrash("id1", new Date());
+  Assert.equal(s.crashesCount, 1);
+
+  let c = s.crashes[0];
+  Assert.ok(c.crashDate);
+  Assert.equal(c.type, bsp.CrashStore.prototype.TYPE_MAIN_CRASH);
+  Assert.ok(c.isMainProcessCrash);
+
+  s.addMainProcessCrash("id2", new Date());
+  Assert.equal(s.crashesCount, 2);
+
+  // Duplicate.
+  s.addMainProcessCrash("id1", new Date());
+  Assert.equal(s.crashesCount, 2);
+
+  Assert.equal(s.mainProcessCrashes.length, 2);
+});
+
+add_task(function* test_add_plugin_crash() {
+  let s = yield getStore();
+
+  s.addPluginCrash("id1", new Date());
+  Assert.equal(s.crashesCount, 1);
+
+  let c = s.crashes[0];
+  Assert.ok(c.crashDate);
+  Assert.equal(c.type, bsp.CrashStore.prototype.TYPE_PLUGIN_CRASH);
+  Assert.ok(c.isPluginCrash);
+
+  s.addPluginCrash("id2", new Date());
+  Assert.equal(s.crashesCount, 2);
+
+  s.addPluginCrash("id1", new Date());
+  Assert.equal(s.crashesCount, 2);
+
+  Assert.equal(s.pluginCrashes.length, 2);
+});
+
+add_task(function* test_add_plugin_hang() {
+  let s = yield getStore();
+
+  s.addPluginHang("id1", new Date());
+  Assert.equal(s.crashesCount, 1);
+
+  let c = s.crashes[0];
+  Assert.ok(c.crashDate);
+  Assert.equal(c.type, bsp.CrashStore.prototype.TYPE_PLUGIN_HANG);
+  Assert.ok(c.isPluginHang);
+
+  s.addPluginHang("id2", new Date());
+  Assert.equal(s.crashesCount, 2);
+
+  s.addPluginHang("id1", new Date());
+  Assert.equal(s.crashesCount, 2);
+
+  Assert.equal(s.pluginHangs.length, 2);
+});
+
+add_task(function* test_add_mixed_types() {
+  let s = yield getStore();
+
+  s.addMainProcessCrash("main", new Date());
+  s.addPluginCrash("pcrash", new Date());
+  s.addPluginHang("phang", new Date());
+
+  Assert.equal(s.crashesCount, 3);
+
+  yield s.save();
+
+  s._data.crashes.clear();
+  Assert.equal(s.crashesCount, 0);
+
+  yield s.load();
+
+  Assert.equal(s.crashesCount, 3);
+
+  Assert.equal(s.mainProcessCrashes.length, 1);
+  Assert.equal(s.pluginCrashes.length, 1);
+  Assert.equal(s.pluginHangs.length, 1);
+});
+
+// Crashes added beyond the high water mark behave properly.
+add_task(function* test_high_water() {
+  let s = yield getStore();
+
+  let d1 = new Date(2014, 0, 1, 0, 0, 0);
+  let d2 = new Date(2014, 0, 2, 0, 0, 0);
+
+  for (let i = 0; i < s.HIGH_WATER_DAILY_THRESHOLD + 1; i++) {
+    s.addMainProcessCrash("m1" + i, d1);
+    s.addMainProcessCrash("m2" + i, d2);
+    s.addPluginCrash("pc1" + i, d1);
+    s.addPluginCrash("pc2" + i, d2);
+    s.addPluginHang("ph1" + i, d1);
+    s.addPluginHang("ph2" + i, d2);
+  }
+
+  // We preserve main process crashes. Plugin crashes and hangs beyond should
+  // be discarded.
+  Assert.equal(s.crashesCount, 6 * s.HIGH_WATER_DAILY_THRESHOLD + 2);
+  Assert.equal(s.mainProcessCrashes.length, 2 * s.HIGH_WATER_DAILY_THRESHOLD + 2);
+  Assert.equal(s.pluginCrashes.length, 2 * s.HIGH_WATER_DAILY_THRESHOLD);
+  Assert.equal(s.pluginHangs.length, 2 * s.HIGH_WATER_DAILY_THRESHOLD);
+
+  // But raw counts should be preserved.
+  let day1 = bsp.dateToDays(d1);
+  let day2 = bsp.dateToDays(d2);
+  Assert.ok(s._countsByDay.has(day1));
+  Assert.ok(s._countsByDay.has(day2));
+  Assert.equal(s._countsByDay.get(day1).get(s.TYPE_MAIN_CRASH),
+               s.HIGH_WATER_DAILY_THRESHOLD + 1);
+  Assert.equal(s._countsByDay.get(day1).get(s.TYPE_PLUGIN_CRASH),
+               s.HIGH_WATER_DAILY_THRESHOLD + 1);
+  Assert.equal(s._countsByDay.get(day1).get(s.TYPE_PLUGIN_HANG),
+               s.HIGH_WATER_DAILY_THRESHOLD + 1);
+
+  yield s.save();
+  yield s.load();
+
+  Assert.ok(s._countsByDay.has(day1));
+  Assert.ok(s._countsByDay.has(day2));
+  Assert.equal(s._countsByDay.get(day1).get(s.TYPE_MAIN_CRASH),
+               s.HIGH_WATER_DAILY_THRESHOLD + 1);
+  Assert.equal(s._countsByDay.get(day1).get(s.TYPE_PLUGIN_CRASH),
+               s.HIGH_WATER_DAILY_THRESHOLD + 1);
+  Assert.equal(s._countsByDay.get(day1).get(s.TYPE_PLUGIN_HANG),
+               s.HIGH_WATER_DAILY_THRESHOLD + 1);
+});