1 files changed, 26 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/splice-delete-non-configurable-during-shrink.js b/js/src/jit-test/tests/basic/splice-delete-non-configurable-during-shrink.js
new file mode 100644
index 0000000000..93dddb5cc6
--- /dev/null
+++ b/js/src/jit-test/tests/basic/splice-delete-non-configurable-during-shrink.js
@@ -0,0 +1,26 @@
+/* Test that splice causing deletion of a non-configurable property stops at exactly step 12(v) of ES5 15.4.4.12 */
+
+var O = [1,2,3,4,5,6];
+var A = undefined;
+Object.defineProperty(O, 3, { configurable: false });
+
+try
+{
+  A = O.splice(0, 6);
+  throw new Error("didn't throw, returned " + A);
+}
+catch (e)
+{
+  assertEq(e instanceof TypeError, true,
+           "deleting O[3] should have caused a TypeError");
+}
+
+assertEq(O.length, 6); // setting length not reached
+assertEq(A, undefined); // return value not reached
+
+assertEq(O[5], undefined); // deletion reached
+assertEq(O[4], undefined); // deletion reached
+assertEq(O[3], 4); // deletion caused exception
+assertEq(O[2], 3); // deletion not reached
+assertEq(O[1], 2); // deletion not reached
+assertEq(O[0], 1); // deletion not reached