Environment-identity-04.js

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// Observably different visits to the same with-statement produce distinct Environments.

var g = newGlobal({newCompartment: true});

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);