surfaces-offsets.js

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// Invalid offsets result in exceptions, not bogus results.

load(libdir + "asserts.js");

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

var dbg = Debugger(g);

var hits;

dbg.onDebuggerStatement = function (frame) {

    assertEq(frame.script.getOffsetLocation(frame.offset).lineNumber, g.line);

    assertThrowsInstanceOf(function () { frame.script.getOffsetLocation(String(frame.offset)).lineNumber; }, Error);

    assertThrowsInstanceOf(function () { frame.script.getOffsetLocation(Object(frame.offset)).lineNumber; }, Error);

    assertThrowsInstanceOf(function () { frame.script.getOffsetLocation(-1).lineNumber; }, Error);

    assertThrowsInstanceOf(function () { frame.script.getOffsetLocation(1000000).lineNumber; }, Error);

    assertThrowsInstanceOf(function () { frame.script.getOffsetLocation(0.25).lineNumber; }, Error);

    assertThrowsInstanceOf(function () { frame.script.getOffsetLocation(+Infinity).lineNumber; }, Error);

    assertThrowsInstanceOf(function () { frame.script.getOffsetLocation(-Infinity).lineNumber; }, Error);

    assertThrowsInstanceOf(function () { frame.script.getOffsetLocation(NaN).lineNumber; }, Error);

    assertThrowsInstanceOf(function () { frame.script.getOffsetLocation(false).lineNumber; }, Error);

    assertThrowsInstanceOf(function () { frame.script.getOffsetLocation(true).lineNumber; }, Error);

    assertThrowsInstanceOf(function () { frame.script.getOffsetLocation(undefined).lineNumber; }, Error);

    assertThrowsInstanceOf(function () { frame.script.getOffsetLocation().lineNumber; }, Error);

    // We assume that at least one whole number between 0 and frame.offset is invalid.

    assertThrowsInstanceOf(

        function () {

            for (var i = 0; i < frame.offset; i++)

                frame.script.getOffsetLocation(i).lineNumber;

},

        Error);

    hits++;

};

hits = 0;

g.eval("var line = new Error().lineNumber; debugger;");