89   const rs = new ReadableStream();  constant
92   const result = rs.pipeThrough({ readable, writable });
108     const rs = new ReadableStream();  constant
112       () => rs.pipeThrough({
128     const rs = new ReadableStream({  constant
134     assert_throws_js(TypeError, () => rs.pipeThrough({
150   const rs = new ReadableStream({  constant
155     readable: rs,
161                         () => ReadableStream.prototype.pipeThrough.call(rs, throwingWritable, {}),
171                         () => ReadableStream.prototype.pipeThrough.call(rs, throwingReadable, {}),
179     const rs = new ReadableStream();  constant
180 … assert_throws_js(TypeError, () => rs.pipeThrough(uninterestingReadableWritablePair(), { signal }),
186   const rs = new ReadableStream();  constant
189   rs.pipeThrough(uninterestingReadableWritablePair(), { signal });
193   const rs = new ReadableStream();  constant
194   rs.getReader();
195   assert_throws_js(TypeError, () => rs.pipeThrough(uninterestingReadableWritablePair()),
200   const rs = new ReadableStream();  constant
204   assert_throws_js(TypeError, () => rs.pipeThrough({writable, readable}),
209   const rs = new ReadableStream();  constant
213   assert_equals(rs.pipeThrough({ writable, readable }), readable,
218   const rs = recordingReadableStream();  constant
225   rs.pipeThrough({ writable, readable }, { preventCancel: true });
227     assert_array_equals(rs.events, ['pull'], 'cancel should not have been called');
232   const rs = new ReadableStream({  constant
239   rs.pipeThrough({ writable, readable }, { preventClose: true });
246   const rs = new ReadableStream({  constant
253   rs.pipeThrough({ writable, readable }, { preventAbort: true });
260   const rs = new ReadableStream();  constant
263   assert_throws_js(TypeError, () => rs.pipeThrough({readable, writable}, {
271   const rs = new ReadableStream();  constant
274   rs.pipeThrough({readable, writable}, null);
278   const rs = new ReadableStream();  constant
281   rs.pipeThrough({readable, writable}, {signal:undefined});
286   const rs = new ReadableStream();
290     rs.pipeThrough(pair, options)