1 files changed, 43 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-of/dstr/obj-prop-elem-init-evaluation.js b/js/src/tests/test262/language/statements/for-of/dstr/obj-prop-elem-init-evaluation.js
new file mode 100644
index 0000000000..64720d42c3
--- /dev/null
+++ b/js/src/tests/test262/language/statements/for-of/dstr/obj-prop-elem-init-evaluation.js
@@ -0,0 +1,43 @@
+// This file was procedurally generated from the following sources:
+// - src/dstr-assignment/obj-prop-elem-init-evaluation.case
+// - src/dstr-assignment/default/for-of.template
+/*---
+description: The Initializer should only be evaluated if v is undefined. (For..of statement)
+esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
+features: [destructuring-binding]
+flags: [generated]
+info: |
+    IterationStatement :
+      for ( LeftHandSideExpression of AssignmentExpression ) Statement
+
+    1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« »,
+       AssignmentExpression, iterate).
+    2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement,
+       keyResult, assignment, labelSet).
+
+    13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
+
+    [...]
+    4. If destructuring is true and if lhsKind is assignment, then
+       a. Assert: lhs is a LeftHandSideExpression.
+       b. Let assignmentPattern be the parse of the source text corresponding to
+          lhs using AssignmentPattern as the goal symbol.
+    [...]
+---*/
+var flag1 = false;
+var flag2 = false;
+var x, y;
+
+var counter = 0;
+
+for ({ x: x = flag1 = true, y: y = flag2 = true } of [{ y: 1 }]) {
+  assert.sameValue(x, true, 'value of `x`');
+  assert.sameValue(flag1, true, 'value of `flag1`');
+  assert.sameValue(y, 1, 'value of `y`');
+  assert.sameValue(flag2, false, 'value of `flag2`');
+  counter += 1;
+}
+
+assert.sameValue(counter, 1);
+
+reportCompare(0, 0);