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-rw-r--r--services/sync/tests/unit/test_utils_deepEquals.js51
1 files changed, 51 insertions, 0 deletions
diff --git a/services/sync/tests/unit/test_utils_deepEquals.js b/services/sync/tests/unit/test_utils_deepEquals.js
new file mode 100644
index 0000000000..c16bb434d0
--- /dev/null
+++ b/services/sync/tests/unit/test_utils_deepEquals.js
@@ -0,0 +1,51 @@
+_("Make sure Utils.deepEquals correctly finds items that are deeply equal");
+
+Services.prefs.setBoolPref("security.allow_eval_with_system_principal", true);
+registerCleanupFunction(() => {
+ Services.prefs.clearUserPref("security.allow_eval_with_system_principal");
+});
+
+function run_test() {
+ let data =
+ '[NaN, undefined, null, true, false, Infinity, 0, 1, "a", "b", {a: 1}, {a: "a"}, [{a: 1}], [{a: true}], {a: 1, b: 2}, [1, 2], [1, 2, 3]]';
+ _("Generating two copies of data:", data);
+ /* eslint-disable no-eval */
+ let d1 = eval(data);
+ let d2 = eval(data);
+ /* eslint-enable no-eval */
+
+ d1.forEach(function(a) {
+ _("Testing", a, typeof a, JSON.stringify([a]));
+ let numMatch = 0;
+
+ d2.forEach(function(b) {
+ if (Utils.deepEquals(a, b)) {
+ numMatch++;
+ _("Found a match", b, typeof b, JSON.stringify([b]));
+ }
+ });
+
+ let expect = 1;
+ if (isNaN(a) && typeof a == "number") {
+ expect = 0;
+ _("Checking NaN should result in no matches");
+ }
+
+ _("Making sure we found the correct # match:", expect);
+ _("Actual matches:", numMatch);
+ Assert.equal(numMatch, expect);
+ });
+
+ _("Make sure adding undefined properties doesn't affect equalness");
+ let a = {};
+ let b = { a: undefined };
+ Assert.ok(Utils.deepEquals(a, b));
+ a.b = 5;
+ Assert.ok(!Utils.deepEquals(a, b));
+ b.b = 5;
+ Assert.ok(Utils.deepEquals(a, b));
+ a.c = undefined;
+ Assert.ok(Utils.deepEquals(a, b));
+ b.d = undefined;
+ Assert.ok(Utils.deepEquals(a, b));
+}