1 files changed, 86 insertions, 0 deletions
diff --git a/js/src/tests/non262/Promise/allSettled.js b/js/src/tests/non262/Promise/allSettled.js
new file mode 100644
index 0000000000..7644ea97a8
--- /dev/null
+++ b/js/src/tests/non262/Promise/allSettled.js
@@ -0,0 +1,86 @@
+// Smoke test for `Promise.allSettled`, test262 should cover the function in
+// more detail.
+
+// Empty elements.
+Promise.allSettled([]).then(v => {
+    assertDeepEq(v, []);
+});
+
+// Single element.
+Promise.allSettled([Promise.resolve(0)]).then(v => {
+    assertDeepEq(v, [
+        {"status": "fulfilled", "value": 0},
+    ]);
+});
+Promise.allSettled([Promise.reject(1)]).then(v => {
+    assertDeepEq(v, [
+        {"status": "rejected", "reason": 1},
+    ]);
+});
+
+// Multiple elements.
+Promise.allSettled([Promise.resolve(1), Promise.resolve(2)]).then(v => {
+    assertDeepEq(v, [
+        {"status": "fulfilled", "value": 1},
+        {"status": "fulfilled", "value": 2},
+    ]);
+});
+Promise.allSettled([Promise.resolve(3), Promise.reject(4)]).then(v => {
+    assertDeepEq(v, [
+        {"status": "fulfilled", "value": 3},
+        {"status": "rejected", "reason": 4},
+    ]);
+});
+Promise.allSettled([Promise.reject(5), Promise.resolve(6)]).then(v => {
+    assertDeepEq(v, [
+        {"status": "rejected", "reason": 5},
+        {"status": "fulfilled", "value": 6},
+    ]);
+});
+Promise.allSettled([Promise.reject(7), Promise.reject(8)]).then(v => {
+    assertDeepEq(v, [
+        {"status": "rejected", "reason": 7},
+        {"status": "rejected", "reason": 8},
+    ]);
+});
+
+// Cross-Realm tests.
+//
+// Note: When |g| is a cross-compartment global, Promise.allSettled creates
+// the result array in |g|'s Realm. This doesn't follow the spec, but the code
+// in js/src/builtin/Promise.cpp claims this is useful when the Promise
+// compartment is less-privileged. This means for this test we can't use
+// assertDeepEq below, because the result array may have the wrong prototype.
+let g = newGlobal();
+
+if (typeof isSameCompartment !== "function") {
+    var isSameCompartment = SpecialPowers.Cu.getJSTestingFunctions().isSameCompartment;
+}
+
+// Test wrapping when neither Promise.allSettled element function is called.
+Promise.allSettled.call(g.Promise, []).then(v => {
+    assertEq(isSameCompartment(v, g), true);
+
+    assertEq(v.length, 0);
+});
+
+// Test wrapping in `Promise.allSettled Resolve Element Function`.
+Promise.allSettled.call(g.Promise, [Promise.resolve(0)]).then(v => {
+    assertEq(isSameCompartment(v, g), true);
+
+    assertEq(v.length, 1);
+    assertEq(v[0].status, "fulfilled");
+    assertEq(v[0].value, 0);
+});
+
+// Test wrapping in `Promise.allSettled Reject Element Function`.
+Promise.allSettled.call(g.Promise, [Promise.reject(0)]).then(v => {
+    assertEq(isSameCompartment(v, g), true);
+
+    assertEq(v.length, 1);
+    assertEq(v[0].status, "rejected");
+    assertEq(v[0].reason, 0);
+});
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);