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-rw-r--r--js/src/tests/non262/Set/is-subset-of.js69
1 files changed, 69 insertions, 0 deletions
diff --git a/js/src/tests/non262/Set/is-subset-of.js b/js/src/tests/non262/Set/is-subset-of.js
new file mode 100644
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+++ b/js/src/tests/non262/Set/is-subset-of.js
@@ -0,0 +1,69 @@
+/*
+ * 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.isSubsetOf, 'function');
+ assertEq(Set.prototype.isSubsetOf.length, 1);
+ assertEq(Set.prototype.isSubsetOf.name, 'isSubsetOf');
+
+ assertEq(new Set([1, true, null]).isSubsetOf(new Set()), false);
+
+ assertEq(new Set([1, true, null]).isSubsetOf([1, true, null]), true);
+ assertEq(new Set([1, 2, 3]).isSubsetOf([2, 3, 4]), false);
+ assertEq(new Set([1, 2, 3]).isSubsetOf([1, 2, 3, 4]), true);
+ // Works when the argument is a custom iterable which follows the Symbol.iterator protocol
+ assertEq(new Set([1, 2, 3]).isSubsetOf(makeArrayIteratorWithHasMethod([3, 4])), false);
+
+ // Works when the `this` is a custom iterable which follows the Symbol.iterator protocol
+ assertEq(
+ Set.prototype.isSubsetOf.call(
+ makeArrayIteratorWithHasMethod([1, 2, 3, 3, 2]),
+ makeArrayIteratorWithHasMethod([4, 5, 6])
+ ),
+ false
+ );
+
+ // Does not modify the original set object
+ const set = new Set([1]);
+ assertEq(set.isSubsetOf(new Set([2])) !== set, true);
+
+ // Argument must be iterable and an object
+ assertThrowsInstanceOf(function () {
+ const set = new Set();
+ set.isSubsetOf();
+ }, TypeError);
+ for (const arg of [null, {}, true, 1, undefined, NaN, Symbol(), ""]) {
+ assertThrowsInstanceOf(function () {
+ const set = new Set();
+ set.isSubsetOf(arg);
+ }, TypeError);
+ }
+
+ // `this` must be an Object
+ for (const arg of [null, undefined, Symbol()]) {
+ assertThrowsInstanceOf(function () {
+ Set.prototype.isSubsetOf.call(arg, []);
+ }, TypeError);
+ }
+
+ // `this` must be iterable
+ assertThrowsInstanceOf(function () {
+ Set.prototype.isSubsetOf.call({}, []);
+ }, TypeError);
+} else {
+ assertEq(typeof Set.prototype.isSubsetOf, 'undefined');
+}
+
+if (typeof reportCompare === "function")
+ reportCompare(true, true);