onDebuggerStatement-generator-resumption-01.js

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// A Debugger can {return:} from onDebuggerStatement in a generator.

load(libdir + "asserts.js");

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

g.eval(`

    function* f1() {

        debugger;

        yield 1;

    function* f2() {

        yield 1;

        debugger;

        yield 2;

`);

let dbg = Debugger(g);

dbg.onDebuggerStatement = frame => ({return: "Ronja"});

let genObj = g.f1();

assertDeepEq(genObj.next(), {value: "Ronja", done: true});

// Forced return closes the generator. Closed generators behave like this:

assertDeepEq(genObj.next(), {value: undefined, done: true});

// It works the same after resuming from a yield.

genObj = g.f2();

assertDeepEq(genObj.next(), {value: 1, done: false});

assertDeepEq(genObj.next(), {value: "Ronja", done: true});

assertDeepEq(genObj.next(), {value: undefined, done: true});  // closed