[event-interface.html]
  [command is a readonly defaulting to '']
    expected: FAIL

  [source is readonly defaulting to null]
    expected: FAIL

  [command reflects initialized attribute]
    expected: FAIL

  [command set to undefined]
    expected: FAIL

  [command set to null]
    expected: FAIL

  [command set to false]
    expected: FAIL

  [command explicitly set to empty string]
    expected: FAIL

  [command set to true]
    expected: FAIL

  [command set to a number]
    expected: FAIL

  [command set to [\]]
    expected: FAIL

  [command set to [1, 2, 3\]]
    expected: FAIL

  [command set to an object]
    expected: FAIL

  [command set to an object with a toString function]
    expected: FAIL

  [CommandEventInit properties set value]
    expected: FAIL

  [CommandEventInit properties set value 2]
    expected: FAIL

  [CommandEventInit properties set value 3]
    expected: FAIL

  [source set to undefined]
    expected: FAIL

  [source set to null]
    expected: FAIL

  [source set to false]
    expected: FAIL

  [source set to true]
    expected: FAIL

  [source set to {}]
    expected: FAIL

  [source set to non-Element EventTarget]
    expected: FAIL