1 files changed, 136 insertions, 0 deletions

diff --git a/modules/libpref/test/unit/test_parsePrefs.js b/modules/libpref/test/unit/test_parsePrefs.js
new file mode 100644
index 0000000000..53bb55dc7e
--- /dev/null
+++ b/modules/libpref/test/unit/test_parsePrefs.js
@@ -0,0 +1,136 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/  */
+
+"use strict";
+
+// // This undoes some of the configuration from
+// Services.dirsvc
+//   .QueryInterface(Ci.nsIDirectoryService)
+//   .unregisterProvider(provider);
+
+class PrefObserver {
+  constructor() {
+    this.events = [];
+  }
+
+  onStringPref(...args) {
+    // // What happens with an exception here?
+    // throw new Error(`foo ${args[1]}`);
+    this.events.push(["string", ...args]);
+  }
+
+  onIntPref(...args) {
+    this.events.push(["int", ...args]);
+  }
+
+  onBoolPref(...args) {
+    this.events.push(["bool", ...args]);
+  }
+
+  onError(message) {
+    this.events.push(["error", message]);
+  }
+}
+
+const TESTS = {
+  "data/testPrefSticky.js": [
+    ["bool", "Default", "testPref.unsticky.bool", true, false, false],
+    ["bool", "Default", "testPref.sticky.bool", false, true, false],
+  ],
+  "data/testPrefStickyUser.js": [
+    ["bool", "User", "testPref.sticky.bool", false, false, false],
+  ],
+  "data/testPrefLocked.js": [
+    ["int", "Default", "testPref.unlocked.int", 333, false, false],
+    ["int", "Default", "testPref.locked.int", 444, false, true],
+  ],
+  // data/testPrefLockedUser is ASCII.
+  "data/testPrefLockedUser.js": [
+    ["int", "User", "testPref.locked.int", 555, false, false],
+  ],
+  // data/testPref is ISO-8859.
+  "data/testPref.js": [
+    ["bool", "User", "testPref.bool1", true, false, false],
+    ["bool", "User", "testPref.bool2", false, false, false],
+    ["int", "User", "testPref.int1", 23, false, false],
+    ["int", "User", "testPref.int2", -1236, false, false],
+    ["string", "User", "testPref.char1", "_testPref", false, false],
+    ["string", "User", "testPref.char2", "älskar", false, false],
+  ],
+  // data/testParsePrefs is data/testPref.js as UTF-8.
+  "data/testPrefUTF8.js": [
+    ["bool", "User", "testPref.bool1", true, false, false],
+    ["bool", "User", "testPref.bool2", false, false, false],
+    ["int", "User", "testPref.int1", 23, false, false],
+    ["int", "User", "testPref.int2", -1236, false, false],
+    ["string", "User", "testPref.char1", "_testPref", false, false],
+    // Observe that this is the ISO-8859/Latin-1 encoding of the UTF-8 bytes.
+    // (Note that this source file is encoded as UTF-8.)  This appears to just
+    // be how libpref handles this case.  This test serves as documentation of
+    // this infelicity.
+    ["string", "User", "testPref.char2", "älskar", false, false],
+  ],
+};
+
+add_task(async function test_success() {
+  for (let [path, expected] of Object.entries(TESTS)) {
+    let prefObserver = new PrefObserver();
+
+    let prefsFile = do_get_file(path);
+    let data = await IOUtils.read(prefsFile.path);
+
+    Services.prefs.parsePrefsFromBuffer(data, prefObserver, path);
+    Assert.deepEqual(
+      prefObserver.events,
+      expected,
+      `Observations from ${path} are as expected`
+    );
+  }
+});
+
+add_task(async function test_exceptions() {
+  const { AddonTestUtils } = ChromeUtils.importESModule(
+    "resource://testing-common/AddonTestUtils.sys.mjs"
+  );
+
+  let s = `user_pref("testPref.bool1", true);
+  user_pref("testPref.bool2", false);
+  user_pref("testPref.int1", 23);
+  user_pref("testPref.int2", -1236);
+  `;
+
+  let onErrorCount = 0;
+  let addPrefCount = 0;
+
+  let marker = "2fc599a1-433b-4de7-bd63-3e69c3bbad5b";
+  let addPref = (...args) => {
+    addPrefCount += 1;
+    throw new Error(`${marker}${JSON.stringify(args)}${marker}`);
+  };
+
+  let { messages } = await AddonTestUtils.promiseConsoleOutput(() => {
+    Services.prefs.parsePrefsFromBuffer(new TextEncoder().encode(s), {
+      onStringPref: addPref,
+      onIntPref: addPref,
+      onBoolPref: addPref,
+      onError(message) {
+        onErrorCount += 1;
+        console.error(message);
+      },
+    });
+  });
+
+  Assert.equal(addPrefCount, 4);
+  Assert.equal(onErrorCount, 0);
+
+  // This is fragile but mercifully simple.
+  Assert.deepEqual(
+    messages.map(m => JSON.parse(m.message.split(marker)[1])),
+    [
+      ["User", "testPref.bool1", true, false, false],
+      ["User", "testPref.bool2", false, false, false],
+      ["User", "testPref.int1", 23, false, false],
+      ["User", "testPref.int2", -1236, false, false],
+    ]
+  );
+});