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const g = newGlobal({newCompartment: true});
g.eval(`
class Base {}
class Derived extends Base {}
this.Derived = Derived;
`);
const dbg = new Debugger(g);
const gw = dbg.addDebuggee(g);
let calleeCount = 0;
dbg.onEnterFrame = frame => {
// Ignore any other callees.
if (frame.callee !== gw.makeDebuggeeValue(g.Derived)) {
return;
}
calleeCount++;
const names = frame.environment.names();
// Set all variables to |null|. This mustn't affect the implicit rest-argument
// of the default derived class constructor, otherwise we'll crash when
// passing the rest-argument to the super spread-call.
frame.onStep = () => {
names.forEach(name => {
frame.environment.setVariable(name, null);
});
};
};
new g.Derived();
// |Derived| should be called at most once.
assertEq(calleeCount, 1);