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// META: global=window,worker,jsshell
// META: script=../resources/recording-streams.js
// META: script=../resources/test-utils.js
'use strict';
promise_test(t => {
const ts = recordingTransformStream({}, undefined, { highWaterMark: 0 });
const rs = new ReadableStream({
start(controller) {
controller.enqueue(0);
}
});
let pipeToRejected = false;
const pipeToPromise = promise_rejects_js(t, TypeError, rs.pipeTo(ts.writable), 'pipeTo should reject').then(() => {
pipeToRejected = true;
});
return delay(0).then(() => {
assert_array_equals(ts.events, [], 'transform() should have seen no chunks');
assert_false(pipeToRejected, 'pipeTo() should not have rejected yet');
ts.controller.terminate();
return pipeToPromise;
}).then(() => {
assert_array_equals(ts.events, [], 'transform() should still have seen no chunks');
assert_true(pipeToRejected, 'pipeToRejected must be true');
});
}, 'controller.terminate() should error pipeTo()');
promise_test(t => {
const ts = recordingTransformStream({}, undefined, { highWaterMark: 1 });
const rs = new ReadableStream({
start(controller) {
controller.enqueue(0);
controller.enqueue(1);
}
});
const pipeToPromise = rs.pipeTo(ts.writable);
return delay(0).then(() => {
assert_array_equals(ts.events, ['transform', 0], 'transform() should have seen one chunk');
ts.controller.terminate();
return promise_rejects_js(t, TypeError, pipeToPromise, 'pipeTo() should reject');
}).then(() => {
assert_array_equals(ts.events, ['transform', 0], 'transform() should still have seen only one chunk');
});
}, 'controller.terminate() should prevent remaining chunks from being processed');
test(() => {
new TransformStream({
start(controller) {
controller.enqueue(0);
controller.terminate();
assert_throws_js(TypeError, () => controller.enqueue(1), 'enqueue should throw');
}
});
}, 'controller.enqueue() should throw after controller.terminate()');
const error1 = new Error('error1');
error1.name = 'error1';
promise_test(t => {
const ts = new TransformStream({
start(controller) {
controller.enqueue(0);
controller.terminate();
controller.error(error1);
}
});
return Promise.all([
promise_rejects_js(t, TypeError, ts.writable.abort(), 'abort() should reject with a TypeError'),
promise_rejects_exactly(t, error1, ts.readable.cancel(), 'cancel() should reject with error1'),
promise_rejects_exactly(t, error1, ts.readable.getReader().closed, 'closed should reject with error1')
]);
}, 'controller.error() after controller.terminate() with queued chunk should error the readable');
promise_test(t => {
const ts = new TransformStream({
start(controller) {
controller.terminate();
controller.error(error1);
}
});
return Promise.all([
promise_rejects_js(t, TypeError, ts.writable.abort(), 'abort() should reject with a TypeError'),
ts.readable.cancel(),
ts.readable.getReader().closed
]);
}, 'controller.error() after controller.terminate() without queued chunk should do nothing');
promise_test(() => {
const ts = new TransformStream({
flush(controller) {
controller.terminate();
}
});
const writer = ts.writable.getWriter();
return Promise.all([
writer.close(),
writer.closed,
ts.readable.getReader().closed
]);
}, 'controller.terminate() inside flush() should not prevent writer.close() from succeeding');
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