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// Simple tests for getExceptionInfo behavior.
function testTestingFunction() {
let vals = [{}, 1, "foo", null, undefined];
for (let v of vals) {
let thrower = () => { throw v; };
let info = getExceptionInfo(thrower);
assertEq(info.exception, v);
assertEq(info.stack.includes("thrower@"), true);
}
// Returns null if there was no exception.
assertEq(getExceptionInfo(() => 123), null);
// OOM exceptions don't have a stack trace.
let info = getExceptionInfo(throwOutOfMemory);
assertEq(info.exception, "out of memory");
assertEq(info.stack, null);
}
testTestingFunction();
/**
* Check that the expected number of stack traces are generated for a given
* global where 100 "throws" are generated
*/
function assertStacksCount(global, expectedStacksCount) {
global.evaluate("(" + function(_expectedStacksCount) {
let thrower = () => { throw 123; };
for (let i = 0; i < 100; i++) {
let info = getExceptionInfo(thrower);
assertEq(info.exception, 123);
// NOTE: if this ever gets increased, update the tests above too!
if (i <= _expectedStacksCount) {
assertEq(info.stack.includes("thrower@"), true);
} else {
assertEq(info.stack, null);
}
}
} + `)(${expectedStacksCount})`);
}
// Debuggee globals always get an exception stack.
function testDebuggee() {
let g = newGlobal({newCompartment: true});
let dbg = new Debugger(g);
assertStacksCount(g, 100);
}
testDebuggee();
// Globals with trusted principals always get an exception stack.
function testTrustedPrincipals() {
let g = newGlobal({newCompartment: true, systemPrincipal: true});
assertStacksCount(g, 100);
}
testTrustedPrincipals();
// In normal cases, a stack is captured only for the first 50 exceptions per realm.
function testNormal() {
let g = newGlobal();
assertStacksCount(g, 50);
}
testNormal();
// Non debuggee with unlimited stacks capturing enabled should always get a stack.
function testEnableUnlimitedStacksCapturing() {
let dbg = new Debugger();
let g = newGlobal();
dbg.enableUnlimitedStacksCapturing(g);
assertStacksCount(g, 100);
dbg.disableUnlimitedStacksCapturing(g);
assertStacksCount(g, 50);
dbg.enableUnlimitedStacksCapturing(g);
assertStacksCount(g, 100);
}
testEnableUnlimitedStacksCapturing();
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