1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/expressions/exponentiation/exp-operator-evaluation-order.js b/js/src/tests/test262/language/expressions/exponentiation/exp-operator-evaluation-order.js
new file mode 100644
index 0000000000..93d4e64379
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/exponentiation/exp-operator-evaluation-order.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2016 Rick Waldron, André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Rick Waldron, André Bargull
+esid: sec-exp-operator-runtime-semantics-evaluation
+description: Exponentiation Operator expression order of evaluation
+info: |
+    ExponentiationExpression:
+      UpdateExpression ** ExponentiationExpression
+
+    1. Let left be the result of evaluating UpdateExpression.
+    2. Let leftValue be ? GetValue(left).
+    3. Let right be the result of evaluating ExponentiationExpression.
+    4. Let rightValue be ? GetValue(right).
+    5. Let base be ? ToNumber(leftValue).
+    6. Let exponent be ? ToNumber(rightValue).
+    7. Return the result of Applying the ** operator with base and exponent as specified in 12.7.3.4.
+features: [exponentiation]
+---*/
+
+var capture = [];
+var leftValue = { valueOf() { capture.push("leftValue"); return 3; }};
+var rightValue = { valueOf() { capture.push("rightValue"); return 2; }};
+
+(capture.push("left"), leftValue) ** (capture.push("right"), rightValue);
+
+// Expected per operator evaluation order: "left", "right", "leftValue", "rightValue"
+
+assert.sameValue(capture[0], "left", "Expected the 1st element captured to be 'left'");
+assert.sameValue(capture[1], "right", "Expected the 2nd element captured to be 'right'");
+assert.sameValue(capture[2], "leftValue", "Expected the 3rd element captured to be 'leftValue'");
+assert.sameValue(capture[3], "rightValue", "Expected the 4th element captured to be 'rightValue'");
+
+reportCompare(0, 0);