1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Frame-onStep-01.js b/js/src/jit-test/tests/debug/Frame-onStep-01.js
new file mode 100644
index 0000000000..dcab3c6add
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Frame-onStep-01.js
@@ -0,0 +1,24 @@
+// Simple Debugger.Frame.prototype.onStep test.
+// Test that onStep fires often enough to see all four values of a.
+
+var g = newGlobal({newCompartment: true});
+g.a = 0;
+g.eval("function f() {\n" +
+       "    a += 2;\n" +
+       "    a += 2;\n" +
+       "    a += 2;\n" +
+       "    return a;\n" +
+       "}\n");
+
+var dbg = Debugger(g);
+var seen = [0, 0, 0, 0, 0, 0, 0];
+dbg.onEnterFrame = function (frame) {
+    frame.onStep = function () {
+        assertEq(arguments.length, 0);
+        assertEq(this, frame);
+        seen[g.a] = 1;
+    };
+}
+
+g.f();
+assertEq(seen.join(""), "1010101");