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Diffstat (limited to 'testing/web-platform/tests/streams/readable-streams/general.js')
| -rw-r--r-- | testing/web-platform/tests/streams/readable-streams/general.js | 859 |
1 files changed, 859 insertions, 0 deletions
diff --git a/testing/web-platform/tests/streams/readable-streams/general.js b/testing/web-platform/tests/streams/readable-streams/general.js new file mode 100644 index 000000000..a8924be05 --- /dev/null +++ b/testing/web-platform/tests/streams/readable-streams/general.js @@ -0,0 +1,859 @@ +'use strict'; + +if (self.importScripts) { + self.importScripts('../resources/test-utils.js'); + self.importScripts('../resources/rs-utils.js'); + self.importScripts('/resources/testharness.js'); +} + +test(() => { + + new ReadableStream(); // ReadableStream constructed with no parameters + new ReadableStream({ }); // ReadableStream constructed with an empty object as parameter + new ReadableStream({ type: undefined }); // ReadableStream constructed with undefined type + new ReadableStream(undefined); // ReadableStream constructed with undefined as parameter + + let x; + new ReadableStream(x); // ReadableStream constructed with an undefined variable as parameter + +}, 'ReadableStream can be constructed with no errors'); + +test(() => { + + assert_throws(new TypeError(), () => new ReadableStream(null), 'constructor should throw when the source is null'); + +}, 'ReadableStream can\'t be constructed with garbage'); + +test(() => { + + assert_throws(new RangeError(), () => new ReadableStream({ type: null }), + 'constructor should throw when the type is null'); + assert_throws(new RangeError(), () => new ReadableStream({ type: '' }), + 'constructor should throw when the type is empty string'); + assert_throws(new RangeError(), () => new ReadableStream({ type: 'asdf' }), + 'constructor should throw when the type is asdf'); + +}, 'ReadableStream can\'t be constructed with an invalid type'); + +test(() => { + + const methods = ['cancel', 'constructor', 'getReader', 'pipeThrough', 'pipeTo', 'tee']; + const properties = methods.concat(['locked']).sort(); + + const rs = new ReadableStream(); + const proto = Object.getPrototypeOf(rs); + + assert_array_equals(Object.getOwnPropertyNames(proto).sort(), properties, 'should have all the correct methods'); + + for (const m of methods) { + const propDesc = Object.getOwnPropertyDescriptor(proto, m); + assert_false(propDesc.enumerable, 'method should be non-enumerable'); + assert_true(propDesc.configurable, 'method should be configurable'); + assert_true(propDesc.writable, 'method should be writable'); + assert_equals(typeof rs[m], 'function', 'method should be a function'); + } + + const lockedPropDesc = Object.getOwnPropertyDescriptor(proto, 'locked'); + assert_false(lockedPropDesc.enumerable, 'locked should be non-enumerable'); + assert_equals(lockedPropDesc.writable, undefined, 'locked should not be a data property'); + assert_equals(typeof lockedPropDesc.get, 'function', 'locked should have a getter'); + assert_equals(lockedPropDesc.set, undefined, 'locked should not have a setter'); + assert_true(lockedPropDesc.configurable, 'locked should be configurable'); + + assert_equals(rs.cancel.length, 1, 'cancel should have 1 parameter'); + assert_equals(rs.constructor.length, 0, 'constructor should have no parameters'); + assert_equals(rs.getReader.length, 0, 'getReader should have no parameters'); + assert_equals(rs.pipeThrough.length, 2, 'pipeThrough should have 2 parameters'); + assert_equals(rs.pipeTo.length, 1, 'pipeTo should have 1 parameter'); + assert_equals(rs.tee.length, 0, 'tee should have no parameters'); + +}, 'ReadableStream instances should have the correct list of properties'); + +test(() => { + + assert_throws(new TypeError(), () => { + new ReadableStream({ start: 'potato' }); + }, 'constructor should throw when start is not a function'); + +}, 'ReadableStream constructor should throw for non-function start arguments'); + +test(() => { + + new ReadableStream({ cancel: '2' }); + +}, 'ReadableStream constructor can get initial garbage as cancel argument'); + +test(() => { + + new ReadableStream({ pull: { } }); + +}, 'ReadableStream constructor can get initial garbage as pull argument'); + +test(() => { + + let startCalled = false; + + const source = { + start(controller) { + assert_equals(this, source, 'source is this during start'); + + const methods = ['close', 'enqueue', 'error', 'constructor']; + const properties = ['desiredSize'].concat(methods).sort(); + const proto = Object.getPrototypeOf(controller); + + assert_array_equals(Object.getOwnPropertyNames(proto).sort(), properties, + 'the controller should have the right properties'); + + for (const m of methods) { + const propDesc = Object.getOwnPropertyDescriptor(proto, m); + assert_equals(typeof controller[m], 'function', `should have a ${m} method`); + assert_false(propDesc.enumerable, m + ' should be non-enumerable'); + assert_true(propDesc.configurable, m + ' should be configurable'); + assert_true(propDesc.writable, m + ' should be writable'); + } + + const desiredSizePropDesc = Object.getOwnPropertyDescriptor(proto, 'desiredSize'); + assert_false(desiredSizePropDesc.enumerable, 'desiredSize should be non-enumerable'); + assert_equals(desiredSizePropDesc.writable, undefined, 'desiredSize should not be a data property'); + assert_equals(typeof desiredSizePropDesc.get, 'function', 'desiredSize should have a getter'); + assert_equals(desiredSizePropDesc.set, undefined, 'desiredSize should not have a setter'); + assert_true(desiredSizePropDesc.configurable, 'desiredSize should be configurable'); + + assert_equals(controller.close.length, 0, 'close should have no parameters'); + assert_equals(controller.constructor.length, 4, 'constructor should have 4 parameter'); + assert_equals(controller.enqueue.length, 1, 'enqueue should have 1 parameter'); + assert_equals(controller.error.length, 1, 'error should have 1 parameter'); + + startCalled = true; + } + }; + + new ReadableStream(source); + assert_true(startCalled); + +}, 'ReadableStream start should be called with the proper parameters'); + +test(() => { + + let startCalled = false; + const source = { + start(controller) { + const properties = ['close', 'constructor', 'desiredSize', 'enqueue', 'error']; + assert_array_equals(Object.getOwnPropertyNames(Object.getPrototypeOf(controller)).sort(), properties, + 'prototype should have the right properties'); + + controller.test = ''; + assert_array_equals(Object.getOwnPropertyNames(Object.getPrototypeOf(controller)).sort(), properties, + 'prototype should still have the right properties'); + assert_not_equals(Object.getOwnPropertyNames(controller).indexOf('test'), -1, + '"test" should be a property of the controller'); + + startCalled = true; + } + }; + + new ReadableStream(source); + assert_true(startCalled); + +}, 'ReadableStream start controller parameter should be extensible'); + +promise_test(() => { + + function SimpleStreamSource() {} + let resolve; + const promise = new Promise(r => resolve = r); + SimpleStreamSource.prototype = { + start: resolve + }; + + new ReadableStream(new SimpleStreamSource()); + return promise; + +}, 'ReadableStream should be able to call start method within prototype chain of its source'); + +promise_test(() => { + + const rs = new ReadableStream({ + start(c) { + return delay(5).then(() => { + c.enqueue('a'); + c.close(); + }); + } + }); + + const reader = rs.getReader(); + return reader.read().then(r => { + assert_object_equals(r, { value: 'a', done: false }, 'value read should be the one enqueued'); + return reader.closed; + }); + +}, 'ReadableStream start should be able to return a promise'); + +promise_test(() => { + + const theError = new Error('rejected!'); + const rs = new ReadableStream({ + start() { + return delay(1).then(() => { throw theError; }); + } + }); + + return rs.getReader().closed.then(() => { + assert_unreached('closed promise should be rejected'); + }, e => { + assert_equals(e, theError, 'promise should be rejected with the same error'); + }); + +}, 'ReadableStream start should be able to return a promise and reject it'); + +promise_test(() => { + + const objects = [ + { potato: 'Give me more!' }, + 'test', + 1 + ]; + + const rs = new ReadableStream({ + start(c) { + for (const o of objects) { + c.enqueue(o); + } + c.close(); + } + }); + + const reader = rs.getReader(); + + return Promise.all([reader.read(), reader.read(), reader.read(), reader.closed]).then(r => { + assert_object_equals(r[0], { value: objects[0], done: false }, 'value read should be the one enqueued'); + assert_object_equals(r[1], { value: objects[1], done: false }, 'value read should be the one enqueued'); + assert_object_equals(r[2], { value: objects[2], done: false }, 'value read should be the one enqueued'); + }); + +}, 'ReadableStream should be able to enqueue different objects.'); + +promise_test(() => { + + const error = new Error('pull failure'); + const rs = new ReadableStream({ + pull() { + return Promise.reject(error); + } + }); + + const reader = rs.getReader(); + + let closed = false; + let read = false; + + return Promise.all([ + reader.closed.then(() => { + assert_unreached('closed should be rejected'); + }, e => { + closed = true; + assert_true(read); + assert_equals(e, error, 'closed should be rejected with the thrown error'); + }), + reader.read().then(() => { + assert_unreached('read() should be rejected'); + }, e => { + read = true; + assert_false(closed); + assert_equals(e, error, 'read() should be rejected with the thrown error'); + }) + ]); + +}, 'ReadableStream: if pull rejects, it should error the stream'); + +promise_test(() => { + + let pullCount = 0; + const startPromise = Promise.resolve(); + + new ReadableStream({ + start() { + return startPromise; + }, + pull() { + pullCount++; + } + }); + + return startPromise.then(() => { + assert_equals(pullCount, 1, 'pull should be called once start finishes'); + return delay(10); + }).then(() => { + assert_equals(pullCount, 1, 'pull should be called exactly once'); + }); + +}, 'ReadableStream: should only call pull once upon starting the stream'); + +promise_test(() => { + + let pullCount = 0; + const startPromise = Promise.resolve(); + + const rs = new ReadableStream({ + start() { + return startPromise; + }, + pull(c) { + // Don't enqueue immediately after start. We want the stream to be empty when we call .read() on it. + if (pullCount > 0) { + c.enqueue(pullCount); + } + ++pullCount; + } + }); + + return startPromise.then(() => { + assert_equals(pullCount, 1, 'pull should be called once start finishes'); + }).then(() => { + const reader = rs.getReader(); + const read = reader.read(); + assert_equals(pullCount, 2, 'pull should be called when read is called'); + return read; + }).then(result => { + assert_equals(pullCount, 3, 'pull should be called again in reaction to calling read'); + assert_object_equals(result, { value: 1, done: false }, 'the result read should be the one enqueued'); + }); + +}, 'ReadableStream: should call pull when trying to read from a started, empty stream'); + +promise_test(() => { + + let pullCount = 0; + const startPromise = Promise.resolve(); + + const rs = new ReadableStream({ + start(c) { + c.enqueue('a'); + return startPromise; + }, + pull() { + pullCount++; + } + }); + + const read = rs.getReader().read(); + assert_equals(pullCount, 0, 'calling read() should not cause pull to be called yet'); + + return startPromise.then(() => { + assert_equals(pullCount, 1, 'pull should be called once start finishes'); + return read; + }).then(r => { + assert_object_equals(r, { value: 'a', done: false }, 'first read() should return first chunk'); + assert_equals(pullCount, 1, 'pull should not have been called again'); + return delay(10); + }).then(() => { + assert_equals(pullCount, 1, 'pull should be called exactly once'); + }); + +}, 'ReadableStream: should only call pull once on a non-empty stream read from before start fulfills'); + +promise_test(() => { + + let pullCount = 0; + const startPromise = Promise.resolve(); + + const rs = new ReadableStream({ + start(c) { + c.enqueue('a'); + return startPromise; + }, + pull() { + pullCount++; + } + }); + + return startPromise.then(() => { + assert_equals(pullCount, 0, 'pull should not be called once start finishes, since the queue is full'); + + const read = rs.getReader().read(); + assert_equals(pullCount, 1, 'calling read() should cause pull to be called immediately'); + return read; + }).then(r => { + assert_object_equals(r, { value: 'a', done: false }, 'first read() should return first chunk'); + return delay(10); + }).then(() => { + assert_equals(pullCount, 1, 'pull should be called exactly once'); + }); + +}, 'ReadableStream: should only call pull once on a non-empty stream read from after start fulfills'); + +promise_test(() => { + + let pullCount = 0; + let controller; + const startPromise = Promise.resolve(); + + const rs = new ReadableStream({ + start(c) { + controller = c; + return startPromise; + }, + pull() { + ++pullCount; + } + }); + + const reader = rs.getReader(); + return startPromise.then(() => { + assert_equals(pullCount, 1, 'pull should have been called once by the time the stream starts'); + + controller.enqueue('a'); + assert_equals(pullCount, 1, 'pull should not have been called again after enqueue'); + + return reader.read(); + }).then(() => { + assert_equals(pullCount, 2, 'pull should have been called again after read'); + + return delay(10); + }).then(() => { + assert_equals(pullCount, 2, 'pull should be called exactly twice'); + }); +}, 'ReadableStream: should call pull in reaction to read()ing the last chunk, if not draining'); + +promise_test(() => { + + let pullCount = 0; + let controller; + const startPromise = Promise.resolve(); + + const rs = new ReadableStream({ + start(c) { + controller = c; + return startPromise; + }, + pull() { + ++pullCount; + } + }); + + const reader = rs.getReader(); + + return startPromise.then(() => { + assert_equals(pullCount, 1, 'pull should have been called once by the time the stream starts'); + + controller.enqueue('a'); + assert_equals(pullCount, 1, 'pull should not have been called again after enqueue'); + + controller.close(); + + return reader.read(); + }).then(() => { + assert_equals(pullCount, 1, 'pull should not have been called a second time after read'); + + return delay(10); + }).then(() => { + assert_equals(pullCount, 1, 'pull should be called exactly once'); + }); + +}, 'ReadableStream: should not call pull() in reaction to read()ing the last chunk, if draining'); + +promise_test(() => { + + let resolve; + let returnedPromise; + let timesCalled = 0; + const startPromise = Promise.resolve(); + + const rs = new ReadableStream({ + start() { + return startPromise; + }, + pull(c) { + c.enqueue(++timesCalled); + returnedPromise = new Promise(r => resolve = r); + return returnedPromise; + } + }); + const reader = rs.getReader(); + + return startPromise.then(() => { + return reader.read(); + }).then(result1 => { + assert_equals(timesCalled, 1, + 'pull should have been called once after start, but not yet have been called a second time'); + assert_object_equals(result1, { value: 1, done: false }, 'read() should fulfill with the enqueued value'); + + return delay(10); + }).then(() => { + assert_equals(timesCalled, 1, 'after 10 ms, pull should still only have been called once'); + + resolve(); + return returnedPromise; + }).then(() => { + assert_equals(timesCalled, 2, + 'after the promise returned by pull is fulfilled, pull should be called a second time'); + }); + +}, 'ReadableStream: should not call pull until the previous pull call\'s promise fulfills'); + +promise_test(() => { + + let timesCalled = 0; + const startPromise = Promise.resolve(); + + const rs = new ReadableStream( + { + start(c) { + c.enqueue('a'); + c.enqueue('b'); + c.enqueue('c'); + return startPromise; + }, + pull() { + ++timesCalled; + } + }, + { + size() { + return 1; + }, + highWaterMark: Infinity + } + ); + const reader = rs.getReader(); + + return startPromise.then(() => { + return reader.read(); + }).then(result1 => { + assert_object_equals(result1, { value: 'a', done: false }, 'first chunk should be as expected'); + + return reader.read(); + }).then(result2 => { + assert_object_equals(result2, { value: 'b', done: false }, 'second chunk should be as expected'); + + return reader.read(); + }).then(result3 => { + assert_object_equals(result3, { value: 'c', done: false }, 'third chunk should be as expected'); + + return delay(10); + }).then(() => { + // Once for after start, and once for every read. + assert_equals(timesCalled, 4, 'pull() should be called exactly four times'); + }); + +}, 'ReadableStream: should pull after start, and after every read'); + +promise_test(() => { + + let timesCalled = 0; + const startPromise = Promise.resolve(); + + const rs = new ReadableStream({ + start(c) { + c.enqueue('a'); + c.close(); + return startPromise; + }, + pull() { + ++timesCalled; + } + }); + + const reader = rs.getReader(); + return startPromise.then(() => { + assert_equals(timesCalled, 0, 'after start finishes, pull should not have been called'); + + return reader.read(); + }).then(() => { + assert_equals(timesCalled, 0, 'reading should not have triggered a pull call'); + + return reader.closed; + }).then(() => { + assert_equals(timesCalled, 0, 'stream should have closed with still no calls to pull'); + }); + +}, 'ReadableStream: should not call pull after start if the stream is now closed'); + +promise_test(() => { + + let timesCalled = 0; + let resolve; + const ready = new Promise(r => resolve = r); + + new ReadableStream( + { + start() {}, + pull(c) { + c.enqueue(++timesCalled); + + if (timesCalled === 4) { + resolve(); + } + } + }, + { + size() { + return 1; + }, + highWaterMark: 4 + } + ); + + return ready.then(() => { + // after start: size = 0, pull() + // after enqueue(1): size = 1, pull() + // after enqueue(2): size = 2, pull() + // after enqueue(3): size = 3, pull() + // after enqueue(4): size = 4, do not pull + assert_equals(timesCalled, 4, 'pull() should have been called four times'); + }); + +}, 'ReadableStream: should call pull after enqueueing from inside pull (with no read requests), if strategy allows'); + +promise_test(() => { + + let pullCalled = false; + + const rs = new ReadableStream({ + pull(c) { + pullCalled = true; + c.close(); + } + }); + + const reader = rs.getReader(); + return reader.closed.then(() => { + assert_true(pullCalled); + }); + +}, 'ReadableStream pull should be able to close a stream.'); + +promise_test(t => { + + const controllerError = { name: 'controller error' }; + + const rs = new ReadableStream({ + pull(c) { + c.error(controllerError); + } + }); + + return promise_rejects(t, controllerError, rs.getReader().closed); + +}, 'ReadableStream pull should be able to error a stream.'); + +promise_test(t => { + + const controllerError = { name: 'controller error' }; + const thrownError = { name: 'thrown error' }; + + const rs = new ReadableStream({ + pull(c) { + c.error(controllerError); + throw thrownError; + } + }); + + return promise_rejects(t, controllerError, rs.getReader().closed); + +}, 'ReadableStream pull should be able to error a stream and throw.'); + +test(() => { + + let startCalled = false; + + new ReadableStream({ + start(c) { + assert_equals(c.enqueue('a'), undefined, 'the first enqueue should return undefined'); + c.close(); + + assert_throws(new TypeError(), () => c.enqueue('b'), 'enqueue after close should throw a TypeError'); + startCalled = true; + } + }); + + assert_true(startCalled); + +}, 'ReadableStream: enqueue should throw when the stream is readable but draining'); + +test(() => { + + let startCalled = false; + + new ReadableStream({ + start(c) { + c.close(); + + assert_throws(new TypeError(), () => c.enqueue('a'), 'enqueue after close should throw a TypeError'); + startCalled = true; + } + }); + + assert_true(startCalled); + +}, 'ReadableStream: enqueue should throw when the stream is closed'); + +promise_test(() => { + + let startCalled = 0; + let pullCalled = 0; + let cancelCalled = 0; + + /* eslint-disable no-use-before-define */ + class Source { + start(c) { + startCalled++; + assert_equals(this, theSource, 'start() should be called with the correct this'); + c.enqueue('a'); + } + + pull() { + pullCalled++; + assert_equals(this, theSource, 'pull() should be called with the correct this'); + } + + cancel() { + cancelCalled++; + assert_equals(this, theSource, 'cancel() should be called with the correct this'); + } + } + /* eslint-enable no-use-before-define */ + + const theSource = new Source(); + theSource.debugName = 'the source object passed to the constructor'; // makes test failures easier to diagnose + + const rs = new ReadableStream(theSource); + const reader = rs.getReader(); + + return reader.read().then(() => { + reader.releaseLock(); + rs.cancel(); + assert_equals(startCalled, 1); + assert_equals(pullCalled, 1); + assert_equals(cancelCalled, 1); + return rs.getReader().closed; + }); + +}, 'ReadableStream: should call underlying source methods as methods'); + +test(() => { + + let startCalled = false; + new ReadableStream({ + start(c) { + assert_equals(c.desiredSize, 1); + c.enqueue('a'); + assert_equals(c.desiredSize, 0); + c.enqueue('b'); + assert_equals(c.desiredSize, -1); + c.enqueue('c'); + assert_equals(c.desiredSize, -2); + c.enqueue('d'); + assert_equals(c.desiredSize, -3); + c.enqueue('e'); + startCalled = true; + } + }); + + assert_true(startCalled); + +}, 'ReadableStream strategies: the default strategy should give desiredSize of 1 to start, decreasing by 1 per enqueue'); + +promise_test(() => { + + let controller; + const rs = new ReadableStream({ + start(c) { + controller = c; + } + }); + const reader = rs.getReader(); + + assert_equals(controller.desiredSize, 1, 'desiredSize should start at 1'); + controller.enqueue('a'); + assert_equals(controller.desiredSize, 0, 'desiredSize should decrease to 0 after first enqueue'); + + return reader.read().then(result1 => { + assert_object_equals(result1, { value: 'a', done: false }, 'first chunk read should be correct'); + + assert_equals(controller.desiredSize, 1, 'desiredSize should go up to 1 after the first read'); + controller.enqueue('b'); + assert_equals(controller.desiredSize, 0, 'desiredSize should go down to 0 after the second enqueue'); + + return reader.read(); + }).then(result2 => { + assert_object_equals(result2, { value: 'b', done: false }, 'second chunk read should be correct'); + + assert_equals(controller.desiredSize, 1, 'desiredSize should go up to 1 after the second read'); + controller.enqueue('c'); + assert_equals(controller.desiredSize, 0, 'desiredSize should go down to 0 after the third enqueue'); + + return reader.read(); + }).then(result3 => { + assert_object_equals(result3, { value: 'c', done: false }, 'third chunk read should be correct'); + + assert_equals(controller.desiredSize, 1, 'desiredSize should go up to 1 after the third read'); + controller.enqueue('d'); + assert_equals(controller.desiredSize, 0, 'desiredSize should go down to 0 after the fourth enqueue'); + }); + +}, 'ReadableStream strategies: the default strategy should continue giving desiredSize of 1 if the chunks are read immediately'); + +promise_test(t => { + + const randomSource = new RandomPushSource(8); + + const rs = new ReadableStream({ + start(c) { + assert_equals(typeof c, 'object', 'c should be an object in start'); + assert_equals(typeof c.enqueue, 'function', 'enqueue should be a function in start'); + assert_equals(typeof c.close, 'function', 'close should be a function in start'); + assert_equals(typeof c.error, 'function', 'error should be a function in start'); + + randomSource.ondata = t.step_func(chunk => { + if (!c.enqueue(chunk) <= 0) { + randomSource.readStop(); + } + }); + + randomSource.onend = c.close.bind(c); + randomSource.onerror = c.error.bind(c); + }, + + pull(c) { + assert_equals(typeof c, 'object', 'c should be an object in pull'); + assert_equals(typeof c.enqueue, 'function', 'enqueue should be a function in pull'); + assert_equals(typeof c.close, 'function', 'close should be a function in pull'); + + randomSource.readStart(); + } + }); + + return readableStreamToArray(rs).then(chunks => { + assert_equals(chunks.length, 8, '8 chunks should be read'); + for (const chunk of chunks) { + assert_equals(chunk.length, 128, 'chunk should have 128 bytes'); + } + }); + +}, 'ReadableStream integration test: adapting a random push source'); + +promise_test(() => { + + const rs = sequentialReadableStream(10); + + return readableStreamToArray(rs).then(chunks => { + assert_true(rs.source.closed, 'source should be closed after all chunks are read'); + assert_array_equals(chunks, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 'the expected 10 chunks should be read'); + }); + +}, 'ReadableStream integration test: adapting a sync pull source'); + +promise_test(() => { + + const rs = sequentialReadableStream(10, { async: true }); + + return readableStreamToArray(rs).then(chunks => { + assert_true(rs.source.closed, 'source should be closed after all chunks are read'); + assert_array_equals(chunks, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 'the expected 10 chunks should be read'); + }); + +}, 'ReadableStream integration test: adapting an async pull source'); + +done(); |