summaryrefslogtreecommitdiffstats
path: root/js/src/jit-test/tests/for-of/semantics-10.js
diff options
context:
space:
mode:
Diffstat (limited to 'js/src/jit-test/tests/for-of/semantics-10.js')
-rw-r--r--js/src/jit-test/tests/for-of/semantics-10.js31
1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/for-of/semantics-10.js b/js/src/jit-test/tests/for-of/semantics-10.js
new file mode 100644
index 000000000..480cb5b33
--- /dev/null
+++ b/js/src/jit-test/tests/for-of/semantics-10.js
@@ -0,0 +1,31 @@
+// The LHS of a for-loop is not bound to a particular scope until after the .next() method returns.
+
+var obj = {};
+
+// Test 1
+function g() {
+ obj.x = 0;
+ yield 1;
+}
+var x = 2, n = 0;
+with (obj) {
+ for (x of g()) // g().next() inserts a binding for x on obj
+ n++;
+}
+assertEq(x, 2);
+assertEq(obj.x, 1);
+assertEq(n, 1);
+
+// Test 2
+function h() {
+ delete obj.x;
+ yield 3;
+}
+n = 0;
+with (obj) {
+ for (x of h()) // h().next() deletes the binding for x on obj
+ n++;
+}
+assertEq(x, 3);
+assertEq("x" in obj, false);
+assertEq(n, 1);