1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/iterable-error-messages.js b/js/src/jit-test/tests/basic/iterable-error-messages.js
new file mode 100644
index 000000000..4d10f92b2
--- /dev/null
+++ b/js/src/jit-test/tests/basic/iterable-error-messages.js
@@ -0,0 +1,39 @@
+function assertThrowsMsg(f, msg) {
+    try {
+        f();
+        assertEq(0, 1);
+    } catch(e) {
+        assertEq(e instanceof TypeError, true);
+        assertEq(e.message, msg);
+    }
+}
+
+// For-of
+function testForOf(val) {
+    for (var x of val) {}
+}
+for (v of [{}, Math, new Proxy({}, {})]) {
+    assertThrowsMsg(() => testForOf(v), "val is not iterable");
+}
+assertThrowsMsg(() => testForOf(null), "val is null");
+assertThrowsMsg(() => { for (var x of () => 1) {}}, "() => 1 is not iterable");
+
+// Destructuring
+function testDestr(val) {
+    var [a, b] = val;
+}
+for (v of [{}, Math, new Proxy({}, {})]) {
+    assertThrowsMsg(() => testDestr(v), "val is not iterable");
+}
+assertThrowsMsg(() => testDestr(null), "val is null");
+assertThrowsMsg(() => { [a, b] = () => 1; }, "() => 1 is not iterable");
+
+// Spread
+function testSpread(val) {
+    [...val];
+}
+for (v of [{}, Math, new Proxy({}, {})]) {
+    assertThrowsMsg(() => testSpread(v), "val is not iterable");
+}
+assertThrowsMsg(() => testSpread(null), "val is null");
+assertThrowsMsg(() => { [...() => 1]; }, "() => 1 is not iterable");