1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Object-makeDebuggeeValue-01.js b/js/src/jit-test/tests/debug/Object-makeDebuggeeValue-01.js
new file mode 100644
index 0000000000..4b281421d4
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Object-makeDebuggeeValue-01.js
@@ -0,0 +1,42 @@
+// Debugger.Object.prototype.makeDebuggeeValue creates only one
+// Debugger.Object instance for each debuggee object.
+
+var g = newGlobal({newCompartment: true});
+var dbg = new Debugger();
+var gw = dbg.addDebuggee(g);
+
+g.eval("var x = { 'now playing': 'Joy Division' };");
+g.eval("var y = { 'mood': 'bleak' };");
+
+wx = gw.makeDebuggeeValue(g.x);
+assertEq(wx, gw.makeDebuggeeValue(g.x));
+assertEq(wx === g.x, false);
+assertEq("now playing" in wx, false);
+assertEq(wx.getOwnPropertyNames().indexOf("now playing"), 0);
+wx.commentary = "deconstruction";
+assertEq("deconstruction" in g.x, false);
+
+wy = gw.makeDebuggeeValue(g.y);
+assertEq(wy === wx, false);
+wy.commentary = "reconstruction";
+assertEq(wx.commentary, "deconstruction");
+
+// Separate debuggers get separate Debugger.Object instances, but both
+// instances' referents are the same underlying object.
+var dbg2 = new Debugger();
+var gw2 = dbg2.addDebuggee(g);
+w2x = gw2.makeDebuggeeValue(g.x);
+assertEq(wx === w2x, false);
+w2x.defineProperty("breadcrumb", { value: "pumpernickel" });
+assertEq(wx.getOwnPropertyDescriptor("breadcrumb").value, "pumpernickel");
+
+// Non-objects are already debuggee values.
+assertEq(gw.makeDebuggeeValue("foonting turlingdromes"), "foonting turlingdromes");
+assertEq(gw.makeDebuggeeValue(true), true);
+assertEq(gw.makeDebuggeeValue(false), false);
+assertEq(gw.makeDebuggeeValue(null), null);
+assertEq(gw.makeDebuggeeValue(1729), 1729);
+assertEq(gw.makeDebuggeeValue(Math.PI), Math.PI);
+assertEq(gw.makeDebuggeeValue(undefined), undefined);
+var s = g.eval("Symbol('Stavromula Beta')");
+assertEq(gw.makeDebuggeeValue(s), s);