53 lines
1.9 KiB
JavaScript
53 lines
1.9 KiB
JavaScript
// META: global=window,worker,shadowrealm
|
|
'use strict';
|
|
|
|
// Tests which patch the global environment are kept separate to avoid
|
|
// interfering with other tests.
|
|
|
|
test(t => {
|
|
// eslint-disable-next-line no-extend-native, accessor-pairs
|
|
Object.defineProperty(Object.prototype, 'highWaterMark', {
|
|
set() { throw new Error('highWaterMark setter called'); },
|
|
configurable: true
|
|
});
|
|
|
|
// eslint-disable-next-line no-extend-native, accessor-pairs
|
|
Object.defineProperty(Object.prototype, 'size', {
|
|
set() { throw new Error('size setter called'); },
|
|
configurable: true
|
|
});
|
|
|
|
t.add_cleanup(() => {
|
|
delete Object.prototype.highWaterMark;
|
|
delete Object.prototype.size;
|
|
});
|
|
|
|
assert_not_equals(new TransformStream(), null, 'constructor should work');
|
|
}, 'TransformStream constructor should not call setters for highWaterMark or size');
|
|
|
|
test(t => {
|
|
const oldReadableStream = ReadableStream;
|
|
const oldWritableStream = WritableStream;
|
|
const getReader = ReadableStream.prototype.getReader;
|
|
const getWriter = WritableStream.prototype.getWriter;
|
|
|
|
// Replace ReadableStream and WritableStream with broken versions.
|
|
ReadableStream = function () {
|
|
throw new Error('Called the global ReadableStream constructor');
|
|
};
|
|
WritableStream = function () {
|
|
throw new Error('Called the global WritableStream constructor');
|
|
};
|
|
t.add_cleanup(() => {
|
|
ReadableStream = oldReadableStream;
|
|
WritableStream = oldWritableStream;
|
|
});
|
|
|
|
const ts = new TransformStream();
|
|
|
|
// Just to be sure, ensure the readable and writable pass brand checks.
|
|
assert_not_equals(getReader.call(ts.readable), undefined,
|
|
'getReader should work when called on ts.readable');
|
|
assert_not_equals(getWriter.call(ts.writable), undefined,
|
|
'getWriter should work when called on ts.writable');
|
|
}, 'TransformStream should use the original value of ReadableStream and WritableStream');
|