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// Test that a frame's onStep handler gets called at least once on each line of a function.
var g = newGlobal({newCompartment: true});
var dbg = new Debugger(g);
// When we hit a 'debugger' statement, set offsets to the frame's script's
// table of line offsets --- a sparse array indexed by line number. Begin
// single-stepping the current frame; for each source line we hit, delete
// the line's entry in offsets. Thus, at the end, offsets is an array with
// an element for each line we did not reach.
var doSingleStep = true;
var offsets;
dbg.onDebuggerStatement = function (frame) {
var script = frame.script;
offsets = script.getAllOffsets();
print("debugger line: " + script.getOffsetLocation(frame.offset).lineNumber);
print("original lines: " + JSON.stringify(Object.keys(offsets)));
if (doSingleStep) {
frame.onStep = function onStepHandler() {
var line = script.getOffsetLocation(this.offset).lineNumber;
delete offsets[line];
};
}
};
g.eval(
'function t(a, b, c) { \n' +
' debugger; \n' +
' var x = a; \n' +
' x += b; \n' +
' if (x < 10) \n' +
' x -= c; \n' +
' return x; \n' +
'} \n'
);
// This should stop at every line but the first of the function.
g.eval('t(1,2,3)');
assertEq(Object.keys(offsets).length, 1);
// This should stop at every line but the first of the function, and the
// body of the 'if'.
g.eval('t(10,20,30)');
assertEq(Object.keys(offsets).length, 2);
// This shouldn't stop at all. It's the frame that's in single-step mode,
// not the script, so the prior execution of t in single-step mode should
// have no effect on this one.
doSingleStep = false;
g.eval('t(0, 0, 0)');
assertEq(Object.keys(offsets).length, 7);
doSingleStep = true;
// Single-step in an eval frame. This should reach every line but the
// first.
g.eval(
'debugger; \n' +
'var a=1, b=2, c=3; \n' +
'var x = a; \n' +
'x += b; \n' +
'if (x < 10) \n' +
' x -= c; \n'
);
print("final lines: " + JSON.stringify(Object.keys(offsets)));
assertEq(Object.keys(offsets).length, 1);
// Single-step in a global code frame. This should reach every line but the
// first.
g.evaluate(
'debugger; \n' +
'var a=1, b=2, c=3; \n' +
'var x = a; \n' +
'x += b; \n' +
'if (x < 10) \n' +
' x -= c; \n'
);
print("final lines: " + JSON.stringify(Object.keys(offsets)));
assertEq(Object.keys(offsets).length, 1);
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