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var objects = [{}, function() {}, new Number(42), new String()];
var primitives = [42, null, undefined, ""];
var firstEventHandler;
objects.forEach(function(object) {
test(t => {
var i = 0;
firstEventHandler = t.unreached_func('First event handler.');
var uncalled = "firstEventHandler();";
var button = document.createElement('button');
button.onclick = object; // event handler listener is registered here
assert_equals(button.onclick, object);
button.addEventListener('click', t.step_func(() => { assert_equals(++i, 2) }), false);
button.setAttribute('onclick', uncalled);
button.addEventListener('click', t.step_func(() => { assert_equals(++i, 3) }), false);
button.onclick = t.step_func(() => { assert_equals(++i, 1); });
button.addEventListener('click', t.step_func(() => { assert_equals(++i, 4) }), false);
button.click()
assert_equals(button.getAttribute("onclick"), uncalled)
assert_equals(i, 4);
}, "Event handler listeners should be registered when they are first set to an object value " +
"(" + format_value(object) + ").");
});
primitives.forEach(function(primitive) {
test(t => {
var i = 0;
firstEventHandler = t.unreached_func('First event handler.');
var uncalled = "firstEventHandler();";
var button = document.createElement('button');
button.onclick = primitive;
assert_equals(button.onclick, null);
button.addEventListener('click', t.step_func(() => { assert_equals(++i, 1) }), false);
button.setAttribute('onclick', uncalled); // event handler listener is registered here
button.addEventListener('click', t.step_func(() => { assert_equals(++i, 3) }), false);
button.onclick = t.step_func(() => { assert_equals(++i, 2); });
button.addEventListener('click', t.step_func(() => { assert_equals(++i, 4) }), false);
button.click()
assert_equals(button.getAttribute("onclick"), uncalled)
assert_equals(i, 4);
}, "Event handler listeners should be registered when they are first set to an object value " +
"(" + format_value(primitive) + ").");
});
test(t => {
var i = 0;
firstEventHandler = t.unreached_func('First event handler.');
var uncalled = "firstEventHandler();";
var button = document.createElement('button');
button.addEventListener('click', t.step_func(() => { assert_equals(++i, 1) }), false);
button.setAttribute('onclick', uncalled); // event handler listener is registered here
button.addEventListener('click', t.step_func(() => { assert_equals(++i, 3) }), false);
button.onclick = t.step_func(() => { assert_equals(++i, 2); });
button.addEventListener('click', t.step_func(() => { assert_equals(++i, 4) }), false);
button.click()
assert_equals(button.getAttribute("onclick"), uncalled)
assert_equals(i, 4);
}, "Event handler listeners should be registered when they are first set to an object value.");
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