Channel_postMessage_Blob.any.js

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This WPT test may be referenced by the following Test IDs:
- /webmessaging/Channel_postMessage_Blob.any.html - WPT Dashboard Interop Dashboard
- /webmessaging/Channel_postMessage_Blob.any.worker.html - WPT Dashboard Interop Dashboard

// META: title=postMessage() with a Blob

// META: script=/common/gc.js

    var TARGET = null;

    var SOURCE = null;

    var description = "Messages can contain Blobs.";

    var t = async_test("Test Description: " + description);

    var channel = new MessageChannel();

    SOURCE = channel.port1;

    TARGET = channel.port2;

    TARGET.start();

    TARGET.addEventListener("message", t.step_func(TestMessageEvent), true);

    (function() {

      SOURCE.postMessage({blob: new Blob(['foo', 'bar'])});

    })();

    garbageCollect();

    function TestMessageEvent(evt)

        assert_true('blob' in evt.data);

        assert_true(evt.data.blob instanceof Blob);

        assert_equals(evt.data.blob.size, 6);

        const reader = new FileReader();

        reader.onerror = t.unreached_func('Reading blob failed');

        reader.onload = t.step_func(() => {

            assert_equals(reader.result, 'foobar');

            t.done();

});

        reader.readAsText(evt.data.blob);