Add m-esr52 at 52.6.0

1 files changed, 46 insertions, 0 deletions

diff --git a/js/src/tests/ecma_5/extensions/watch-replaced-setter.js b/js/src/tests/ecma_5/extensions/watch-replaced-setter.js
new file mode 100644
index 000000000..05cf60aff
--- /dev/null
+++ b/js/src/tests/ecma_5/extensions/watch-replaced-setter.js
@@ -0,0 +1,46 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+/* A stock watcher function. */
+var watcherCount;
+function watcher(id, oldval, newval) { watcherCount++; return newval; }
+
+/* Create an object with a JavaScript setter. */
+var setterCount;
+var o = { w:2, set x(v) { setterCount++; } };
+
+/*
+ * Put the object in dictionary mode, so that JSObject::putProperty will 
+ * mutate its shapes instead of creating new ones.
+ */
+delete o.w;
+
+/*
+ * Place a watchpoint on the property. The watchpoint structure holds the
+ * original JavaScript setter, and a pointer to the shape.
+ */
+o.watch('x', watcher);
+
+/*
+ * Replace the accessor property with a value property. The shape's setter
+ * should become a non-JS setter, js_watch_set, and the watchpoint
+ * structure's saved setter should be updated (in this case, cleared).
+ */
+Object.defineProperty(o, 'x', { value:3,
+                                writable:true,
+                                enumerable:true,
+                                configurable:true });
+
+/*
+ * Assign to the property. This should trigger js_watch_set, which should
+ * call the handler, and then see that there is no JS-level setter to pass
+ * control on to, and return.
+ */
+watcherCount = setterCount = 0;
+o.x = 3;
+assertEq(watcherCount, 1);
+assertEq(setterCount, 0);
+
+reportCompare(true, true);