Content - 7d1c0d94a0845b5351c50f5255bcff381cee17a6 - 2d0b852/dom/events/Event-dispatch-throwing.html

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Tip revision: 408c5e41c82df2a84320ae8a9b09f3b15d2e519f authored by Luke Bjerring on 28 March 2018, 17:47:16 UTC
Changes as per review

Tip revision: 408c5e4

Event-dispatch-throwing.html

<!DOCTYPE html>
<meta charset="UTF-8">
<title>Throwing in event listeners</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
setup({allow_uncaught_exception:true})

test(function() {
    var errorEvents = 0;
    window.onerror = this.step_func(function(e) {
        assert_equals(typeof e, 'string');
        ++errorEvents;
    });

    var element = document.createElement('div');

    element.addEventListener('click', function() {
        throw new Error('Error from only listener');
    });

    element.dispatchEvent(new Event('click'));

    assert_equals(errorEvents, 1);
}, "Throwing in event listener with a single listeners");

test(function() {
    var errorEvents = 0;
    window.onerror = this.step_func(function(e) {
        assert_equals(typeof e, 'string');
        ++errorEvents;
    });

    var element = document.createElement('div');

    var secondCalled = false;

    element.addEventListener('click', function() {
        throw new Error('Error from first listener');
    });
    element.addEventListener('click', this.step_func(function() {
        secondCalled = true;
    }), false);

    element.dispatchEvent(new Event('click'));

    assert_equals(errorEvents, 1);
    assert_true(secondCalled);
}, "Throwing in event listener with multiple listeners");
</script>

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