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-rw-r--r--js/src/jit-test/tests/debug/Environment-identity-04.js19
1 files changed, 19 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Environment-identity-04.js b/js/src/jit-test/tests/debug/Environment-identity-04.js
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+++ b/js/src/jit-test/tests/debug/Environment-identity-04.js
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+// Observably different visits to the same with-statement produce distinct Environments.
+
+var g = newGlobal();
+g.eval("function f(a, obj) { with (obj) return function () { return a; }; }");
+var dbg = Debugger(g);
+var hits = 0;
+dbg.onDebuggerStatement = function (frame) {
+ // Even though the two visits to the with-statement have the same target
+ // object, Math, the environments are observably different.
+ var f1 = frame.eval("f(1, Math);").return;
+ var f2 = frame.eval("f(2, Math);").return;
+ assertEq(f1.environment !== f2.environment, true);
+ assertEq(f1.object, f2.object);
+ assertEq(f1.call().return, 1);
+ assertEq(f2.call().return, 2);
+ hits++;
+};
+g.eval("debugger;");
+assertEq(hits, 1);