1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/throws-when-this-value-length-is-writable-false.js b/js/src/tests/test262/built-ins/Array/prototype/shift/throws-when-this-value-length-is-writable-false.js
new file mode 100644
index 0000000000..1c03b29e68
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/throws-when-this-value-length-is-writable-false.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2020 Sony Interactive Entertainment Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.shift
+description: >
+  Array#shift throws TypeError if this value's "length" property was defined with [[Writable]]: false.
+info: |
+  Array.prototype.shift ( )
+  ...
+  3. If len is zero, then
+    a. Perform ? Set(O, "length", 0, true).
+    ...
+  8. Perform ? Set(O, "length", len - 1, true).
+
+  Set ( O, P, V, Throw )
+  ...
+  4. Let success be ? O.[[Set]](P, V, O).
+  5. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+assert.throws(TypeError, () => {
+  Array.prototype.shift.call('');
+}, "Array.prototype.shift.call('')");
+
+assert.throws(TypeError, () => {
+  Array.prototype.shift.call('abc');
+}, "Array.prototype.shift.call('abc')");
+
+assert.throws(TypeError, () => {
+  Array.prototype.shift.call(function() {});
+}, "Array.prototype.shift.call(function() {})");
+
+assert.throws(TypeError, () => {
+  Array.prototype.shift.call(Object.defineProperty({}, 'length', {writable: false}));
+}, "Array.prototype.shift.call(Object.defineProperty({}, 'length', {writable: false}))");
+
+reportCompare(0, 0);