Frame-onStep-20.js

Enable keyboard shortcuts

// Stepping should always pause in a frame between two function calls.

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

g.evaluate(`

    class X {

        constructor() { this._p = 0; }

        m() { return this; }

        get p() { return this._p; }

        set p(value) { this._p = value; }

    let x = new X;

    function f() { return 1; }

    function inc(x) { return x + 1; }

`);

let dbg = Debugger(g);

// `code` is a snippet of JS that performs two JS calls.

function test(code) {

    let hits = 0;

    let log = "";

    dbg.onEnterFrame = frame => {

        if (hits++ === 0)

            frame.onStep = () => { log += "s"; };

        else

            log += "E";

};

    g.eval(code);

    assertEq(log.includes("EE"), false, "should have received onStep between onEnterFrame events");

    assertEq(log.match(/^s+Es+Es*$/) !== null, true,

             "should get two calls, with steps before, between, and possibly after");

test("f(); f();");

test("f() + f()");

test("inc(f())");

test("x.m().m()");

test("new X().m()");

test("x.p = x.p");  // getter, then setter