1 files changed, 66 insertions, 0 deletions
diff --git a/services/common/tests/unit/test_utils_sets.js b/services/common/tests/unit/test_utils_sets.js
new file mode 100644
index 0000000000..c15d48528f
--- /dev/null
+++ b/services/common/tests/unit/test_utils_sets.js
@@ -0,0 +1,66 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const EMPTY = new Set();
+const A = new Set(["a"]);
+const ABC = new Set(["a", "b", "c"]);
+const ABCD = new Set(["a", "b", "c", "d"]);
+const BC = new Set(["b", "c"]);
+const BCD = new Set(["b", "c", "d"]);
+const FGH = new Set(["f", "g", "h"]);
+const BCDFGH = new Set(["b", "c", "d", "f", "g", "h"]);
+
+var union = CommonUtils.union;
+var difference = CommonUtils.difference;
+var intersection = CommonUtils.intersection;
+var setEqual = CommonUtils.setEqual;
+
+function do_check_setEqual(a, b) {
+  Assert.ok(setEqual(a, b));
+}
+
+function do_check_not_setEqual(a, b) {
+  Assert.ok(!setEqual(a, b));
+}
+
+add_test(function test_setEqual() {
+  do_check_setEqual(EMPTY, EMPTY);
+  do_check_setEqual(EMPTY, new Set());
+  do_check_setEqual(A, A);
+  do_check_setEqual(A, new Set(["a"]));
+  do_check_setEqual(new Set(["a"]), A);
+  do_check_not_setEqual(A, EMPTY);
+  do_check_not_setEqual(EMPTY, A);
+  do_check_not_setEqual(ABC, A);
+  run_next_test();
+});
+
+add_test(function test_union() {
+  do_check_setEqual(EMPTY, union(EMPTY, EMPTY));
+  do_check_setEqual(ABC, union(EMPTY, ABC));
+  do_check_setEqual(ABC, union(ABC, ABC));
+  do_check_setEqual(ABCD, union(ABC, BCD));
+  do_check_setEqual(ABCD, union(BCD, ABC));
+  do_check_setEqual(BCDFGH, union(BCD, FGH));
+  run_next_test();
+});
+
+add_test(function test_difference() {
+  do_check_setEqual(EMPTY, difference(EMPTY, EMPTY));
+  do_check_setEqual(EMPTY, difference(EMPTY, A));
+  do_check_setEqual(EMPTY, difference(A, A));
+  do_check_setEqual(ABC, difference(ABC, EMPTY));
+  do_check_setEqual(ABC, difference(ABC, FGH));
+  do_check_setEqual(A, difference(ABC, BCD));
+  run_next_test();
+});
+
+add_test(function test_intersection() {
+  do_check_setEqual(EMPTY, intersection(EMPTY, EMPTY));
+  do_check_setEqual(EMPTY, intersection(ABC, EMPTY));
+  do_check_setEqual(EMPTY, intersection(ABC, FGH));
+  do_check_setEqual(BC, intersection(ABC, BCD));
+  run_next_test();
+});