Worker-formdata.any.js

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /workers/Worker-formdata.any.worker.html - WPT Dashboard Interop Dashboard

// META: global=dedicatedworker

test(() => {

  assert_own_property(self, 'FormData');

  assert_equals(FormData.length, 0);

  var formData = new FormData();

  assert_not_equals(formData, null);

  assert_own_property(FormData.prototype, 'append');

  formData.append('key', 'value');

  var blob = new Blob([]);

  assert_not_equals(blob, null);

  formData.append('key', blob);

  formData.append('key', blob, 'filename');

  assert_throws_dom("DataCloneError",

                    function() { postMessage(formData) },

                    "Trying to clone formdata inside a postMessage results in an exception." );

},'Test FormData interface object');