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// Test that stepping through a function stops at the expected lines.
// `script` is a string, some JS code that evaluates to a function.
// `expected` is the array of line numbers where stepping is expected to stop
// when we call the function.
function testStepping(script, expected) {
let g = newGlobal({newCompartment: true});
let f = g.eval(script);
let log = [];
function maybePause(frame) {
let previousLine = log[log.length - 1]; // note: may be undefined
let line = frame.script.getOffsetLocation(frame.offset).lineNumber;
if (line !== previousLine)
log.push(line);
}
let dbg = new Debugger(g);
dbg.onEnterFrame = frame => {
// Log this pause (before the first instruction of the function).
maybePause(frame);
// Log future pauses in the same stack frame.
frame.onStep = function() { maybePause(this); };
// Now disable this hook so that we step over function calls, not into them.
dbg.onEnterFrame = undefined;
};
f();
assertEq(log.join(","), expected.join(","));
}
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