<!DOCTYPE html>
<html>
<head>
  <title>Test for single filepicker per event</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script src="/tests/SimpleTest/EventUtils.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
  <div id='foo'><a href='#'>Click here to test this issue</a></div>
  <script>

SimpleTest.requestFlakyTimeout("Timeouts are needed to simulate user-interaction");
SimpleTest.waitForExplicitFinish();

let clickCount = 0;
let foo = document.getElementById('foo');
foo.addEventListener('click', _ => {
  if (++clickCount < 10) {
    let input = document.createElement('input');
    input.type = 'file';
    foo.appendChild(input);
    input.click();
  }
});

let MockFilePicker = SpecialPowers.MockFilePicker;
MockFilePicker.init(window);

let pickerCount = 0;

SpecialPowers.pushPrefEnv({
  set: [["dom.disable_open_during_load", true]],
})
// Let's do the first click.
.then(() => {
  return new Promise(resolve => {
    MockFilePicker.showCallback = function(filepicker) {
      ++pickerCount;
      resolve();
    }
    setTimeout(_ => {
      is(pickerCount, 0, "No file picker initially");
      synthesizeMouseAtCenter(foo, {});
    }, 0);
  })
})

// Let's wait a bit more, then let's do a click.
.then(() => {
  return new Promise(resolve => {
    MockFilePicker.showCallback = function(filepicker) {
      ++pickerCount;
      resolve();
    }

    setTimeout(() => {
      is(pickerCount, 1, "Only 1 file picker");
      is(clickCount, 10, "10 clicks triggered");
      clickCount = 0;
      pickerCount = 0;
      synthesizeMouseAtCenter(foo, {});
    }, 1000);
  });
})

// Another click...
.then(_ => {
  setTimeout(() => {
    is(pickerCount, 1, "Only 1 file picker");
    is(clickCount, 10, "10 clicks triggered");
    MockFilePicker.cleanup();
    SimpleTest.finish();
  }, 1000);
});

</script>
</body>
</html>
