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promise_test(async t => {
var reader = new FileReader();
var eventWatcher = new EventWatcher(t, reader, ['loadstart', 'progress', 'abort', 'error', 'load', 'loadend']);
reader.readAsText(new Blob([]));
await eventWatcher.wait_for('loadstart');
// No progress event for an empty blob, as no data is loaded.
await eventWatcher.wait_for('load');
await eventWatcher.wait_for('loadend');
}, 'events are dispatched in the correct order for an empty blob');
promise_test(async t => {
var reader = new FileReader();
var eventWatcher = new EventWatcher(t, reader, ['loadstart', 'progress', 'abort', 'error', 'load', 'loadend']);
reader.readAsText(new Blob(['a']));
await eventWatcher.wait_for('loadstart');
await eventWatcher.wait_for('progress');
await eventWatcher.wait_for('load');
await eventWatcher.wait_for('loadend');
}, 'events are dispatched in the correct order for a non-empty blob');
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