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<!DOCTYPE html>
<meta charset="utf-8">
<title>TestDriver actions: event order</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>

<button id="a">Button a</button>
<button id="b">Button b</button>
<input id="text-input">

<script>
// Pointer 1 is added before Pointer 2 so it comes first in the list of sources
// Therefore its actions happen first
let events = [];

promise_test(() => {
  Array.prototype.forEach.call(document.getElementsByTagName("button"),
                               (x) => x.addEventListener("mousedown", () => {events.push(x.id)}));

  let button_a = document.getElementById("a");
  let button_b = document.getElementById("b");
  return new test_driver.Actions()
    .addPointer("pointer1")
    .addPointer("pointer2")
    .pointerMove(0, 0, {origin: button_a, sourceName: "pointer1"})
    .pointerMove(0, 0, {origin: button_b, sourceName: "pointer2"})
    .pointerDown({sourceName: "pointer2"})
    .pointerDown({sourceName: "pointer1"})
    .pointerUp({sourceName: "pointer2"})
    .pointerUp({sourceName: "pointer1"})
    .send()
    .then(() => assert_array_equals(events, ["a", "b"]));
});

// This test uses a large number of keyboard sources to force race conditions
// in implementations which incorrectly dispatch events. Despite belonging to
// the same "tick," each action's initial event should be dispatched in series.
promise_test(() => {
  const input = document.getElementById("text-input");
  const actions = new test_driver.Actions();
  const code_for_a = "a".charCodeAt(0);
  const keys = Array.from(Array(26))
    .map((_, index) => ({
      sourceName: "keyboard" + index,
      code: String.fromCharCode(code_for_a + index)
    }));

  keys.forEach(({sourceName}) => actions.addKeyboard(sourceName));
  keys.forEach(({code, sourceName}) => actions.keyDown(code, {sourceName}));
  keys.forEach(({code, sourceName}) => actions.keyUp(code,{sourceName}));

  return test_driver.click(input)
    .then(() => actions.send())
    .then(() => {
      assert_equals(input.value, "abcdefghijklmnopqrstuvwxyz");
    });
}, "indivisible actions on the same track dispatch events in series");
</script>