Script-getOffsetLocation.js

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// getOffsetLocation agrees with getAllColumnOffsets

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

Debugger(global).onDebuggerStatement = function (frame) {

    var script = frame.script;

    var byOffset = [];

    script.getAllColumnOffsets().forEach(function (entry) {

        var {lineNumber, columnNumber, offset} = entry;

        byOffset[offset] = {lineNumber, columnNumber};

});

    frame.onStep = function() {

        var offset = frame.offset;

        var location = script.getOffsetLocation(offset);

        if (location.isEntryPoint) {

            assertEq(location.lineNumber, byOffset[offset].lineNumber);

            assertEq(location.columnNumber, byOffset[offset].columnNumber);

        } else {

            assertEq(byOffset[offset], undefined);

};

};

function test(body) {

  print("Test: " + body);

  global.eval(`function f(n) { debugger; ${body} }`);

  global.f(3);

test("for (var i = 0; i < n; ++i) ;");

test("var w0,x1=3,y2=4,z3=9");

test("print(n),print(n),print(n)");

test("var o={a:1,b:2,c:3}");

test("var a=[1,2,n]");

global.eval("function ppppp() { return 1; }");

test("1 && ppppp(ppppp()) && new Error()");