dependent-promises.js

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// |reftest| skip-if(!xulRuntime.shell) -- needs Debugger

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

var dbg = new Debugger(g);

var gw = dbg.addDebuggee(g);

g.eval(`

var p = new Promise(() => {});

p.name = "p";

var q = p.then();

q.name = "q";

var r = p.then(null, () => {});

r.name = "r";

var s = Promise.all([p, q]);

s.name = "s";

var t = Promise.race([r, s]);

t.name = "t";

`);

function getDependentNames(promise) {

    return gw.makeDebuggeeValue(promise).promiseDependentPromises.map((p) => p.getOwnPropertyDescriptor('name').value);

function arraysEqual(arr1, arr2, msg) {

    assertEq(arr1.length, arr2.length, msg + ": length");

    for (var i = 0; i < arr1.length; ++i) {

        assertEq(arr1[i], arr2[i], msg + ": [" + i + "]");

arraysEqual(getDependentNames(g.p), ["q", "r", "s"], "deps for p");

arraysEqual(getDependentNames(g.q), ["s"], "deps for q");

arraysEqual(getDependentNames(g.r), ["t"], "deps for r");

arraysEqual(getDependentNames(g.s), ["t"], "deps for s");

this.reportCompare && reportCompare(true,true);