Environment-unscopables.js

Enable keyboard shortcuts

// An Environment for a `with` statement does not observe bindings ruled out by @@unscopables.

load(libdir + "asserts.js");

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

g.eval(`

    let x = 'global';

    function f() {

        let obj = {

            x: 'obj',

            y: 'obj',

            [Symbol.unscopables]: {x: 1},

};

        with (obj)

            debugger;

`);

let dbg = Debugger(g);

let hits = 0;

dbg.onDebuggerStatement = function (frame) {

    let env = frame.environment;

    assertEq(env.find("x") !== env, true);

    assertEq(env.names().indexOf("x"), -1);

    assertEq(env.getVariable("x"), undefined);

    assertThrowsInstanceOf(() => env.setVariable("x", 7), TypeError);

    assertEq(env.find("y") === env, true);

    assertEq(env.getVariable("y"), "obj");

    env.setVariable("y", 8);

    assertEq(frame.eval("x").return, "global");

    assertEq(frame.eval("y").return, 8);

    hits++;

};

g.f();

assertEq(hits, 1);