Environment-identity-02.js

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// frame.environment is different for different activations of a scope.

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

var dbg = Debugger(g);

g.eval("function h() { debugger; }");

var arr;

dbg.onDebuggerStatement = function (hframe) {

    var e = hframe.older.environment;

    assertEq(arr.indexOf(e), -1);

    arr.push(e);

};

function test(code, expectedHits) {

    arr = [];

    g.eval(code);

    assertEq(arr.length, expectedHits);

// two separate calls to a function

test("(function () { var f = function (a) { h(); return a; }; f(1); f(2); })();", 2);

// recursive calls to a function

test("(function f(n) { h(); return n < 2 ? 1 : n * f(n - 1); })(3);", 3);

// separate visits to a block in the same call frame

test("(function () { for (var i = 0; i < 3; i++) { let j = i * 4; h(); }})();", 3);

// two strict direct eval calls in the same function scope

test("(function () { 'use strict'; for (var i = 0; i < 3; i++) eval('h();'); })();", 3);