Frame-environment-07.js

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// Test that Debugger.Frame.prototype.environment works on suspended generators.

load(libdir + "asserts.js");

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

const dbg = new Debugger(g);

g.eval(`

function* f() {

  var value = 42;

  yield;

    let block = "block";

    yield;

  for (let loop of ["loop"]) {

    yield;

  try {

    throw "err";

  } catch (err) {

    yield;

  return value;

`);

let frame;

dbg.onEnterFrame = f => {

  frame = f;

  dbg.onEnterFrame = undefined;

};

const it = g.f();

assertEq(!!frame, true);

let result = it.next();

assertEq(result.done, false);

assertEq(result.value, undefined);

assertEq(

  JSON.stringify(frame.environment.names()),

  JSON.stringify(["arguments", "value"])

);

assertEq(frame.environment.getVariable("value"), 42);

frame.environment.setVariable("value", 43);

assertEq(frame.environment.getVariable("value"), 43);

result = it.next();

assertEq(

  JSON.stringify(frame.environment.names()),

  JSON.stringify(["block"])

);

assertEq(frame.environment.getVariable("block"), "block");

result = it.next();

assertEq(

  JSON.stringify(frame.environment.names()),

  JSON.stringify(["loop"])

);

assertEq(frame.environment.getVariable("loop"), "loop");

result = it.next();

assertEq(

  JSON.stringify(frame.environment.names()),

  JSON.stringify(["err"])

);

assertEq(frame.environment.getVariable("err"), "err");

result = it.next();

assertEq(result.done, true);

assertEq(result.value, 43);

assertThrowsInstanceOf(() => frame.environment, Error);