michael@0: // Invalid offsets result in exceptions, not bogus results.
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: 
michael@0: var g = newGlobal();
michael@0: var dbg = Debugger(g);
michael@0: var hits;
michael@0: dbg.onDebuggerStatement = function (frame) {
michael@0:     assertEq(frame.script.getOffsetLine(frame.offset), g.line);
michael@0:     assertThrowsInstanceOf(function () { frame.script.getOffsetLine(String(frame.offset)); }, Error);
michael@0:     assertThrowsInstanceOf(function () { frame.script.getOffsetLine(Object(frame.offset)); }, Error);
michael@0: 
michael@0:     assertThrowsInstanceOf(function () { frame.script.getOffsetLine(-1); }, Error);
michael@0:     assertThrowsInstanceOf(function () { frame.script.getOffsetLine(1000000); }, Error);
michael@0:     assertThrowsInstanceOf(function () { frame.script.getOffsetLine(0.25); }, Error);
michael@0:     assertThrowsInstanceOf(function () { frame.script.getOffsetLine(+Infinity); }, Error);
michael@0:     assertThrowsInstanceOf(function () { frame.script.getOffsetLine(-Infinity); }, Error);
michael@0:     assertThrowsInstanceOf(function () { frame.script.getOffsetLine(NaN); }, Error);
michael@0: 
michael@0:     assertThrowsInstanceOf(function () { frame.script.getOffsetLine(false); }, Error);
michael@0:     assertThrowsInstanceOf(function () { frame.script.getOffsetLine(true); }, Error);
michael@0:     assertThrowsInstanceOf(function () { frame.script.getOffsetLine(undefined); }, Error);
michael@0:     assertThrowsInstanceOf(function () { frame.script.getOffsetLine(); }, Error);
michael@0: 
michael@0:     // We assume that at least one whole number between 0 and frame.offset is invalid.
michael@0:     assertThrowsInstanceOf(
michael@0:         function () {
michael@0:             for (var i = 0; i < frame.offset; i++)
michael@0:                 frame.script.getOffsetLine(i);
michael@0:         },
michael@0:         Error);
michael@0: 
michael@0:     hits++;
michael@0: };
michael@0: 
michael@0: hits = 0;
michael@0: g.eval("var line = new Error().lineNumber; debugger;");