Add m-esr52 at 52.6.0

1 files changed, 38 insertions, 0 deletions

diff --git a/js/src/tests/ecma_5/extensions/watch-inherited-property.js b/js/src/tests/ecma_5/extensions/watch-inherited-property.js
new file mode 100644
index 000000000..1a0ad566b
--- /dev/null
+++ b/js/src/tests/ecma_5/extensions/watch-inherited-property.js
@@ -0,0 +1,38 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+/* Create a prototype object with a setter property. */
+var protoSetterCount;
+var proto = ({ set x(v) { protoSetterCount++; } });
+
+/* Put a watchpoint on that setter. */
+var protoWatchCount;
+proto.watch('x', function() { protoWatchCount++; });
+
+/* Make an object with the above as its prototype. */
+function C() { }
+C.prototype = proto;
+var o = new C();
+
+/*
+ * Set a watchpoint on the property in the inheriting object. We have
+ * defined this to mean "duplicate the property, setter and all, in the
+ * inheriting object." I don't think debugging observation mechanisms
+ * should mutate the program being run, but that's what we've got.
+ */
+var oWatchCount;
+o.watch('x', function() { oWatchCount++; });
+
+/*
+ * Assign to the property. This should trip the watchpoint on the inheriting object and
+ * the setter.
+ */
+protoSetterCount = protoWatchCount = oWatchCount = 0;
+o.x = 1;
+assertEq(protoWatchCount, 0);
+assertEq(oWatchCount, 1);
+assertEq(protoSetterCount, 1);
+
+reportCompare(true, true);