Script-startColumn.js

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// Script.prototype.startColumn returns the correct column for all scripts.

const g = newGlobal({newCompartment: true, useWindowProxy: true});

const dbg = Debugger(g);

const gw = dbg.addDebuggee(g);

function test(f, expected) {

    const fw = gw.makeDebuggeeValue(f);

    assertEq(fw.callable, true);

    assertEq(fw.script.startColumn, expected);

g.eval(`

function f1() { }

`);

test(g.f1, 12);

g.eval(`

var f2 = function({ a, b, c }, d, e, ...more) { };

`);

test(g.f2, 18);

g.eval(`

var f3 = function *() { };

`);

test(g.f3, 20);

g.eval(`

var f4 = async function

  () { };

`);

test(g.f4, 3);

g.eval(`

var f5 = (a, b) => a + b;

`);

test(g.f5, 10);

g.eval(`

var f6 = a => a + 1;

`);

test(g.f6, 10);

g.eval(`

var MyClass = class {

    method() { }

};

var myInstance = new MyClass();

`);

test(g.myInstance.method, 11);

test(g.myInstance.constructor, 15);

const g2 = newGlobal({newCompartment: true, useWindowProxy: true});

const dbg2 = Debugger(g2);

const g2Wrapped = dbg2.addDebuggee(g2);

g2.evaluate(`

function f7() { }

`, {

  forceFullParse: true,

});

const f7w = g2Wrapped.makeDebuggeeValue(g2.f7);

assertEq(f7w.callable, true);

assertEq(f7w.script.startColumn, 12);

g.eval(`

function f8() {

    return function f8Inner() { }

`);

test(g.f8, 12);

test(g.f8(), 28);

g.eval(`

var f9 = new Function(\"\");

`);

test(g.f9, 1);

let hit = 0;

let column;

dbg.onDebuggerStatement = function (frame) {

    column = frame.script.startColumn;

    hit += 1;

};

g.eval(`    debugger;`);

assertEq(column, 1);

assertEq(hit, 1);

const location = { fileName: "column.js", lineNumber: 1, columnNumber: 1 };

hit = 0;

g.evaluate(`    debugger;`, location);

assertEq(column, 1);

assertEq(hit, 1);

g.evaluate(`var f10 = function () { };`, location);

test(g.f10, 20);

g.evaluate(`

var f11 = function () { };

`, location);

test(g.f11, 20);