1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/ecma_5/extensions/watch-array-length.js b/js/src/tests/ecma_5/extensions/watch-array-length.js
new file mode 100644
index 000000000..e9b356efa
--- /dev/null
+++ b/js/src/tests/ecma_5/extensions/watch-array-length.js
@@ -0,0 +1,41 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+var hitCount;
+function watcher(p,o,n) { hitCount++; return n; }
+
+var a = [1];
+a.watch('length', watcher);
+hitCount = 0;
+a.length = 0;
+reportCompare(1, hitCount, "lenient; configurable: watchpoint hit");
+
+var b = Object.defineProperty([1],'0',{configurable:false});
+b.watch('length', watcher);
+hitCount = 0;
+var result;
+try {
+    b.length = 0;    
+    result = "no error";
+} catch (x) {
+    result = x.toString();
+}
+reportCompare(1, hitCount, "lenient; non-configurable: watchpoint hit");
+reportCompare(1, b.length, "lenient; non-configurable: length unchanged");
+reportCompare("no error", result, "lenient; non-configurable: no error thrown");
+
+var c = Object.defineProperty([1],'0',{configurable:false});
+c.watch('length', watcher);
+hitCount = 0;
+var threwTypeError;
+try {
+    (function(){'use strict'; c.length = 0;})();
+    threwTypeError = false;
+} catch (x) {
+    threwTypeError = x instanceof TypeError;
+}
+reportCompare(1, hitCount, "strict; non-configurable: watchpoint hit");
+reportCompare(1, c.length, "strict; non-configurable: length unchanged");
+reportCompare(true, threwTypeError, "strict; non-configurable: TypeError thrown");