1 files changed, 23 insertions, 0 deletions
diff --git a/js/src/tests/non262/strict/primitive-assignment.js b/js/src/tests/non262/strict/primitive-assignment.js
new file mode 100644
index 0000000000..4b2ee79f0e
--- /dev/null
+++ b/js/src/tests/non262/strict/primitive-assignment.js
@@ -0,0 +1,23 @@
+let primitives = [
+    10,
+    false,
+    "test",
+    Symbol()
+];
+
+let key = "key";
+
+for (let value of primitives) {
+    // Doesn't throw outside strict mode.
+    assertEq(value.x = 5, 5);
+    assertEq(value[key] = 6, 6);
+
+    assertThrowsInstanceOf(function() { "use strict"; value.x = 5; }, TypeError);
+    assertThrowsInstanceOf(function() { "use strict"; value[key] = 6; }, TypeError);
+
+    let target = {};
+    assertEq(Reflect.set(target, key, 5, value), false);
+    assertEq(key in target, false);
+}
+
+reportCompare(true, true);