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-rw-r--r--js/src/tests/non262/Set/is-superset-of.js63
1 files changed, 63 insertions, 0 deletions
diff --git a/js/src/tests/non262/Set/is-superset-of.js b/js/src/tests/non262/Set/is-superset-of.js
new file mode 100644
index 0000000000..d814f061f9
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+++ b/js/src/tests/non262/Set/is-superset-of.js
@@ -0,0 +1,63 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * https://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+if (typeof getBuildConfiguration === "undefined") {
+ var getBuildConfiguration = SpecialPowers.Cu.getJSTestingFunctions().getBuildConfiguration;
+}
+
+if (typeof getRealmConfiguration === "undefined") {
+ var getRealmConfiguration = SpecialPowers.Cu.getJSTestingFunctions().getRealmConfiguration;
+}
+
+if (getBuildConfiguration()['new-set-methods'] && getRealmConfiguration().enableNewSetMethods) {
+
+ assertEq(typeof Set.prototype.isSupersetOf, 'function');
+ assertEq(Set.prototype.isSupersetOf.length, 1);
+ assertEq(Set.prototype.isSupersetOf.name, 'isSupersetOf');
+
+ assertEq(new Set([1, true, null]).isSupersetOf(new Set()), true);
+ assertEq(new Set([1, true, null]).isSupersetOf([1, true, null]), true);
+ assertEq(new Set([1, 2, 3]).isSupersetOf([2, 3, 4]), false);
+ assertEq(new Set([1, 2, 3]).isSupersetOf([3]), true);
+ // Works when the argument is a custom iterable which follows the Symbol.iterator protocol
+ assertEq(new Set([1, 2, 3]).isSupersetOf(makeArrayIteratorWithHasMethod([2, 3])), true);
+ assertEq(new Set(['a']).isSupersetOf('abc'), false);
+
+ // Works when the `this` is a custom iterable which follows the Symbol.iterator protocol
+ assertEq(Set.prototype.isSupersetOf.call(makeArrayIteratorWithHasMethod([1, 2, 3, 3, 2]), [4, 5, 6]), false);
+
+ // Does not modify the original set object
+ const set = new Set([1]);
+ assertEq(set.isSupersetOf([2]) !== set, true);
+
+ // Argument must be iterable
+ assertThrowsInstanceOf(function () {
+ const set = new Set();
+ set.isSupersetOf();
+ }, TypeError);
+ for (const arg of [null, {}, true, 1, undefined, NaN, Symbol()]) {
+ assertThrowsInstanceOf(function () {
+ const set = new Set();
+ set.isSupersetOf(arg);
+ }, TypeError);
+ }
+
+ // `this` must be an Object
+ for (const arg of [null, undefined, Symbol()]) {
+ assertThrowsInstanceOf(function () {
+ Set.prototype.isSupersetOf.call(arg, []);
+ }, TypeError);
+ }
+
+ // `this` must be iterable
+ assertThrowsInstanceOf(function () {
+ Set.prototype.isSupersetOf.call({}, []);
+ }, TypeError);
+} else {
+ assertEq(typeof Set.prototype.isSupersetOf, 'undefined');
+}
+
+if (typeof reportCompare === "function")
+ reportCompare(true, true);