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-rw-r--r--js/src/jit-test/tests/for-of/semantics-11.js43
1 files changed, 43 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/for-of/semantics-11.js b/js/src/jit-test/tests/for-of/semantics-11.js
new file mode 100644
index 000000000..8075808de
--- /dev/null
+++ b/js/src/jit-test/tests/for-of/semantics-11.js
@@ -0,0 +1,43 @@
+// for-of on a proxy causes a predictable sequence of trap calls.
+
+load(libdir + "iteration.js");
+
+var s = '';
+
+var i = 0;
+var next_fn = new Proxy(function() {}, {
+ apply() {
+ s += "n";
+ if (i == 3)
+ return { value: undefined, done: true };
+ return { value: i++, done: false };
+ }
+});
+
+var it = new Proxy({}, {
+ get(target, property, receiver) {
+ assertEq(property, "next");
+ s += "N";
+ return next_fn;
+ }
+});
+
+var iterator_fn = new Proxy(function() {}, {
+ apply() {
+ s += 'i';
+ return it;
+ }
+});
+
+var obj = new Proxy({}, {
+ get: function (receiver, name) {
+ assertEq(name, Symbol.iterator);
+ s += "I";
+ return iterator_fn;
+ }
+});
+
+for (var v of obj)
+ s += v;
+
+assertEq(s, 'IiNn0Nn1Nn2Nn');