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-rw-r--r--js/src/tests/non262/Set/union.js65
1 files changed, 65 insertions, 0 deletions
diff --git a/js/src/tests/non262/Set/union.js b/js/src/tests/non262/Set/union.js
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index 0000000000..c7cf8026e5
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+++ b/js/src/tests/non262/Set/union.js
@@ -0,0 +1,65 @@
+/*
+ * 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.union, 'function');
+ assertEq(Set.prototype.union.length, 1);
+ assertEq(Set.prototype.union.name, 'union');
+
+ assertSetContainsExactOrderedItems(new Set([1, true, null]).union(new Set()), [1, true, null]);
+ assertSetContainsExactOrderedItems(new Set([1, true, null]).union([1, true, null]), [1, true, null]);
+ assertSetContainsExactOrderedItems(new Set([1, 2, 3]).union([2, 3, 4]), [1, 2, 3, 4]);
+ assertSetContainsExactOrderedItems(new Set([1, 2, 3]).union([4]), [1, 2, 3, 4]);
+ // Works when the argument is a custom iterable which follows the Symbol.iterator protocol
+ assertSetContainsExactOrderedItems(new Set([1, 2, 3]).union(makeArrayIterator([3, 4])), [1, 2, 3, 4]);
+ assertSetContainsExactOrderedItems(new Set(['a']).union('abc'), ['a', 'b', 'c']);
+
+ // Works when the `this` is a custom iterable which follows the Symbol.iterator protocol
+ assertSetContainsExactOrderedItems(Set.prototype.union.call(makeArrayIterator([1, 2, 3, 3, 2]), [4, 5, 6]), [1, 2, 3, 4, 5, 6]);
+
+ // Does not modify the original set object
+ const set = new Set([1]);
+ assertEq(set.union([2]) !== set, true);
+
+ // Argument must be iterable
+ assertThrowsInstanceOf(function () {
+ const set = new Set();
+ set.union();
+ }, TypeError);
+ for (const arg of [null, {}, true, 1, undefined, NaN, Symbol()]) {
+ assertThrowsInstanceOf(function () {
+ const set = new Set();
+ set.union(arg);
+ }, TypeError);
+ }
+
+ // `this` must be an Object
+ for (const arg of [null, undefined, Symbol()]) {
+ assertThrowsInstanceOf(function () {
+ Set.prototype.union.call(arg, []);
+ }, TypeError);
+ }
+
+ // `this` must be iterable
+ assertThrowsInstanceOf(function () {
+ Set.prototype.union.call({}, []);
+ }, TypeError);
+} else {
+ assertEq(typeof Set.prototype.union, 'undefined');
+}
+
+if (typeof reportCompare === "function")
+ reportCompare(true, true);