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test(t => {
const c = new AbortController(),
s = c.signal;
let state = "begin";
assert_false(s.aborted);
s.addEventListener("abort",
t.step_func(e => {
assert_equals(state, "begin");
state = "aborted";
})
);
c.abort();
assert_equals(state, "aborted");
assert_true(s.aborted);
c.abort();
}, "AbortController abort() should fire event synchronously");
test(t => {
const controller = new AbortController();
const signal = controller.signal;
assert_equals(controller.signal, signal,
"value of controller.signal should not have changed");
controller.abort();
assert_equals(controller.signal, signal,
"value of controller.signal should still not have changed");
}, "controller.signal should always return the same object");
test(t => {
const controller = new AbortController();
const signal = controller.signal;
let eventCount = 0;
signal.onabort = () => {
++eventCount;
};
controller.abort();
assert_true(signal.aborted);
assert_equals(eventCount, 1, "event handler should have been called once");
controller.abort();
assert_true(signal.aborted);
assert_equals(eventCount, 1,
"event handler should not have been called again");
}, "controller.abort() should do nothing the second time it is called");
test(t => {
const controller = new AbortController();
controller.abort();
controller.signal.onabort =
t.unreached_func("event handler should not be called");
}, "event handler should not be called if added after controller.abort()");
test(t => {
const controller = new AbortController();
const signal = controller.signal;
signal.onabort = t.step_func(e => {
assert_equals(e.type, "abort", "event type should be abort");
assert_equals(e.target, signal, "event target should be signal");
assert_false(e.bubbles, "event should not bubble");
assert_true(e.isTrusted, "event should be trusted");
});
controller.abort();
}, "the abort event should have the right properties");
done();
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