Object-name-03.js - mozsearch

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// Test `name` and `displayName` getters on a bound function Debugger.Object.

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

var hits = 0;

var dbg = new Debugger(g);

var nameResults = [];

var displayNameResults = [];

dbg.onDebuggerStatement = function (frame) {

    nameResults.push(frame.arguments[0].name);

    displayNameResults.push(frame.arguments[0].displayName);

};

g.eval(`

function f(val) { debugger; }

function foo() {};

let bound1 = foo.bind(null);

let bound2 = bound1.bind();

let bound3 = bound2.bind();

f(bound1);

f(bound2);

f(bound3);

// Change bound1.name to "bar".

Object.defineProperty(bound1, "name", {value: "bar", configurable: true, writable: true});

f(bound1);

// Change bound1.name to 123. Not a string so now "bound" will be returned.

bound1.name = 123;

f(bound1);

// Delete bound2.name so now "bound" will be used.

delete bound2.name;

f(bound2);

// Binding a native function.

f(print.bind().bind().bind());

`)

for (let res of [nameResults, displayNameResults]) {

    assertEq(res.length, 7);

    assertEq(res[0], "bound foo");

    assertEq(res[1], "bound bound foo");

    assertEq(res[2], "bound bound bound foo");

    assertEq(res[3], "bar");

    assertEq(res[4], "bound");

    assertEq(res[5], "bound");

    assertEq(res[6], "bound bound bound print");