<script src="../include.js"></script>
<script>
    function testTransformStreamReadableStreamCancellation() {
        const transformStream = new TransformStream({
            cancel(reason) {
                println(`TransformStream cancelled due to: ${reason}`);
                return Promise.resolve();
            }
        });
        transformStream.readable.cancel('cancel called by the readable side.');
    }

    test(() => {
        testTransformStreamReadableStreamCancellation();
    });
</script>