onDebuggerStatement-async-resumption-01.js

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// A Debugger can {return:} from onDebuggerStatement in an async function.

// The async function's promise is resolved with the returned value.

load(libdir + "asserts.js");

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

g.eval(`

    async function f(x) {

        debugger;  // when==0 to force return here

        await x;

        debugger;  // when==1 to force return here

`);

let dbg = new Debugger;

let gw = dbg.addDebuggee(g);

function test(when, what, expected) {

    let hits = 0;

    let result = "FAIL";

    dbg.onDebuggerStatement = frame => {

        if (hits++ == when)

            return {return: gw.makeDebuggeeValue(what)};

};

    g.f(0).then(x => { result = x; });

    assertEq(hits, 1);

    drainJobQueue();

    assertEq(hits, when + 1);

    assertEq(result, expected);

for (let i = 0; i < 2; i++) {

    test(i, "ok", "ok");

    test(i, g.Promise.resolve(37), 37);