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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/webtransport/incoming_stream.h"
#include <utility>
#include "base/test/mock_callback.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/bindings/core/v8/iterable.h"
#include "third_party/blink/renderer/bindings/core/v8/native_value_traits_impl.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_tester.h"
#include "third_party/blink/renderer/bindings/core/v8/script_value.h"
#include "third_party/blink/renderer/bindings/core/v8/to_v8_traits.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_binding_for_testing.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_dom_exception.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_readable_stream_byob_reader_read_options.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_readable_stream_read_result.h"
#include "third_party/blink/renderer/core/dom/dom_exception.h"
#include "third_party/blink/renderer/core/streams/readable_stream.h"
#include "third_party/blink/renderer/core/streams/readable_stream_byob_reader.h"
#include "third_party/blink/renderer/core/streams/readable_stream_default_reader.h"
#include "third_party/blink/renderer/core/typed_arrays/dom_typed_array.h"
#include "third_party/blink/renderer/modules/webtransport/web_transport_error.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/testing/task_environment.h"
#include "third_party/blink/renderer/platform/testing/unit_test_helpers.h"
#include "v8/include/v8.h"
namespace blink {
namespace {
using ::testing::ElementsAre;
using ::testing::StrictMock;
class IncomingStreamTest : public ::testing::Test {
public:
// The default value of |capacity| means some sensible value selected by mojo.
void CreateDataPipe(uint32_t capacity = 0) {
MojoCreateDataPipeOptions options;
options.struct_size = sizeof(MojoCreateDataPipeOptions);
options.flags = MOJO_CREATE_DATA_PIPE_FLAG_NONE;
options.element_num_bytes = 1;
options.capacity_num_bytes = capacity;
MojoResult result = mojo::CreateDataPipe(&options, data_pipe_producer_,
data_pipe_consumer_);
if (result != MOJO_RESULT_OK) {
ADD_FAILURE() << "CreateDataPipe() returned " << result;
}
}
IncomingStream* CreateIncomingStream(const V8TestingScope& scope,
uint32_t capacity = 0) {
CreateDataPipe(capacity);
auto* script_state = scope.GetScriptState();
auto* incoming_stream = MakeGarbageCollected<IncomingStream>(
script_state, mock_on_abort_.Get(), std::move(data_pipe_consumer_));
incoming_stream->Init(ASSERT_NO_EXCEPTION);
return incoming_stream;
}
void WriteToPipe(Vector<uint8_t> data) {
EXPECT_EQ(data_pipe_producer_->WriteAllData(data), MOJO_RESULT_OK);
}
void ClosePipe() { data_pipe_producer_.reset(); }
// Copies the contents of a v8::Value containing a Uint8Array to a Vector.
static Vector<uint8_t> ToVector(V8TestingScope& scope,
v8::Local<v8::Value> v8value) {
Vector<uint8_t> ret;
NotShared<DOMUint8Array> value =
NativeValueTraits<NotShared<DOMUint8Array>>::NativeValue(
scope.GetIsolate(), v8value, scope.GetExceptionState());
if (!value) {
ADD_FAILURE() << "chunk is not an Uint8Array";
return ret;
}
ret.AppendSpan(value->ByteSpan());
return ret;
}
struct Iterator {
bool done = false;
Vector<uint8_t> value;
};
// Performs a single read from |reader|, converting the output to the
// Iterator type. Assumes that the readable stream is not errored.
static Iterator Read(V8TestingScope& scope,
ReadableStreamDefaultReader* reader) {
auto* script_state = scope.GetScriptState();
auto read_promise = reader->read(script_state, ASSERT_NO_EXCEPTION);
ScriptPromiseTester tester(script_state, read_promise);
tester.WaitUntilSettled();
EXPECT_TRUE(tester.IsFulfilled());
return IteratorFromReadResult(scope, tester.Value().V8Value());
}
static Iterator Read(V8TestingScope& scope,
ReadableStreamBYOBReader* reader,
NotShared<DOMArrayBufferView> view) {
auto* script_state = scope.GetScriptState();
auto* read_options =
MakeGarbageCollected<ReadableStreamBYOBReaderReadOptions>();
auto read_promise =
reader->read(script_state, view, read_options, ASSERT_NO_EXCEPTION);
ScriptPromiseTester tester(script_state, read_promise);
tester.WaitUntilSettled();
EXPECT_TRUE(tester.IsFulfilled());
return IteratorFromReadResult(scope, tester.Value().V8Value());
}
static Iterator IteratorFromReadResult(V8TestingScope& scope,
v8::Local<v8::Value> result) {
CHECK(result->IsObject());
Iterator ret;
v8::Local<v8::Value> v8value;
if (!V8UnpackIterationResult(scope.GetScriptState(),
result.As<v8::Object>(), &v8value,
&ret.done)) {
ADD_FAILURE() << "Couldn't unpack iterator";
return {};
}
if (ret.done) {
EXPECT_TRUE(v8value->IsUndefined());
return ret;
}
ret.value = ToVector(scope, v8value);
return ret;
}
static Iterator IteratorFromReadResultAllowingValueOnDone(
V8TestingScope& scope,
v8::Local<v8::Value> result) {
CHECK(result->IsObject());
Iterator ret;
v8::Local<v8::Value> v8value;
if (!V8UnpackIterationResult(scope.GetScriptState(),
result.As<v8::Object>(), &v8value,
&ret.done)) {
ADD_FAILURE() << "Couldn't unpack iterator";
return {};
}
if (!v8value->IsUndefined()) {
ret.value = ToVector(scope, v8value);
}
return ret;
}
base::MockOnceCallback<void(std::optional<uint8_t>)> mock_on_abort_;
test::TaskEnvironment task_environment_;
mojo::ScopedDataPipeProducerHandle data_pipe_producer_;
mojo::ScopedDataPipeConsumerHandle data_pipe_consumer_;
};
TEST_F(IncomingStreamTest, Create) {
V8TestingScope scope;
auto* incoming_stream = CreateIncomingStream(scope);
EXPECT_TRUE(incoming_stream->Readable());
}
TEST_F(IncomingStreamTest, ReadArrayBuffer) {
V8TestingScope scope;
auto* incoming_stream = CreateIncomingStream(scope);
auto* script_state = scope.GetScriptState();
auto* reader = incoming_stream->Readable()->GetDefaultReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
WriteToPipe({'A'});
Iterator result = Read(scope, reader);
EXPECT_FALSE(result.done);
EXPECT_THAT(result.value, ElementsAre('A'));
}
// Respond BYOB requests created before and after receiving data.
TEST_F(IncomingStreamTest, ReadArrayBufferWithBYOBReader) {
V8TestingScope scope;
auto* incoming_stream = CreateIncomingStream(scope);
auto* script_state = scope.GetScriptState();
auto* reader = incoming_stream->Readable()->GetBYOBReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
NotShared<DOMArrayBufferView> view =
NotShared<DOMUint8Array>(DOMUint8Array::Create(1));
auto* read_options =
MakeGarbageCollected<ReadableStreamBYOBReaderReadOptions>();
auto read_promise =
reader->read(script_state, view, read_options, ASSERT_NO_EXCEPTION);
ScriptPromiseTester tester(script_state, read_promise);
EXPECT_FALSE(tester.IsFulfilled());
WriteToPipe({'A', 'B', 'C'});
tester.WaitUntilSettled();
EXPECT_TRUE(tester.IsFulfilled());
Iterator result = IteratorFromReadResult(scope, tester.Value().V8Value());
EXPECT_FALSE(result.done);
EXPECT_THAT(result.value, ElementsAre('A'));
view = NotShared<DOMUint8Array>(DOMUint8Array::Create(2));
result = Read(scope, reader, view);
EXPECT_FALSE(result.done);
EXPECT_THAT(result.value, ElementsAre('B', 'C'));
}
// Ensure that when `min` is less than buffer size, the BYOB reader
// does not resolve until `min` bytes are available.
TEST_F(IncomingStreamTest,
ReadArrayBufferWithBYOBReaderAndMinOptionLessThanBufferSize) {
V8TestingScope scope;
auto* incoming_stream = CreateIncomingStream(scope);
auto* script_state = scope.GetScriptState();
auto* reader = incoming_stream->Readable()->GetBYOBReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
// Create a view of 5 bytes.
NotShared<DOMArrayBufferView> view =
NotShared<DOMUint8Array>(DOMUint8Array::Create(5));
// Set `min` = 3.
auto* read_options =
MakeGarbageCollected<ReadableStreamBYOBReaderReadOptions>();
read_options->setMin(3);
// Start the read before writing any data.
auto read_promise =
reader->read(script_state, view, read_options, ASSERT_NO_EXCEPTION);
ScriptPromiseTester tester(script_state, read_promise);
// Write only 2 bytes: should not fulfill yet since `min` = 3.
WriteToPipe({'A', 'B'});
test::RunPendingTasks();
EXPECT_FALSE(tester.IsFulfilled());
// Write one more byte (total now = 3): should fulfill.
WriteToPipe({'C'});
tester.WaitUntilSettled();
EXPECT_TRUE(tester.IsFulfilled());
Iterator result = IteratorFromReadResult(scope, tester.Value().V8Value());
EXPECT_FALSE(result.done);
EXPECT_EQ(result.value.size(), 3u);
EXPECT_THAT(result.value, ElementsAre('A', 'B', 'C'));
}
// Ensure read with `min` equal to buffer size only resolves when the full
// buffer can be filled.
TEST_F(IncomingStreamTest, ReadArrayBufferWithBYOBReaderMinEqualToBufferSize) {
V8TestingScope scope;
auto* incoming_stream = CreateIncomingStream(scope);
auto* script_state = scope.GetScriptState();
auto* reader = incoming_stream->Readable()->GetBYOBReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
// Create a view of 4 bytes.
NotShared<DOMArrayBufferView> view =
NotShared<DOMUint8Array>(DOMUint8Array::Create(4));
// Set `min` = 4 (equal to view size).
auto* read_options =
MakeGarbageCollected<ReadableStreamBYOBReaderReadOptions>();
read_options->setMin(4);
// Start the read before writing any data.
auto read_promise =
reader->read(script_state, view, read_options, ASSERT_NO_EXCEPTION);
ScriptPromiseTester tester(script_state, read_promise);
// Write only 3 bytes, which is not enough to fulfill.
WriteToPipe({'A', 'B', 'C'});
test::RunPendingTasks();
EXPECT_FALSE(tester.IsFulfilled());
// Write 1 more byte (total = 4), now it should fulfill.
WriteToPipe({'D'});
tester.WaitUntilSettled();
EXPECT_TRUE(tester.IsFulfilled());
Iterator result = IteratorFromReadResult(scope, tester.Value().V8Value());
EXPECT_FALSE(result.done);
EXPECT_EQ(result.value.size(), 4u);
EXPECT_THAT(result.value, ElementsAre('A', 'B', 'C', 'D'));
}
// This test verifies that a BYOB read with a `min` requirement resolves with
// available data when the stream is closed remotely before `min` bytes are
// received. Even though `min` was not satisfied, the read must resolve with the
// partial data instead of hanging or throwing, as per the spec behavior for
// stream closure.
TEST_F(IncomingStreamTest, ReadWithMinAndStreamClosure) {
V8TestingScope scope;
auto* incoming_stream = CreateIncomingStream(scope);
auto* script_state = scope.GetScriptState();
auto* reader = incoming_stream->Readable()->GetBYOBReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
NotShared<DOMArrayBufferView> view =
NotShared<DOMUint8Array>(DOMUint8Array::Create(4));
auto* read_options =
MakeGarbageCollected<ReadableStreamBYOBReaderReadOptions>();
read_options->setMin(4);
auto read_promise =
reader->read(script_state, view, read_options, ASSERT_NO_EXCEPTION);
ScriptPromiseTester tester(script_state, read_promise);
// Write only 3 bytes.
WriteToPipe({'A', 'B', 'C'});
test::RunPendingTasks();
EXPECT_FALSE(tester.IsFulfilled());
incoming_stream->OnIncomingStreamClosed(true);
ClosePipe();
test::RunPendingTasks();
tester.WaitUntilSettled();
EXPECT_TRUE(tester.IsFulfilled());
// Validate that 3 bytes were returned.
Iterator result = IteratorFromReadResultAllowingValueOnDone(
scope, tester.Value().V8Value());
EXPECT_TRUE(result.done);
EXPECT_EQ(result.value.size(), 3u);
EXPECT_THAT(result.value, ElementsAre('A', 'B', 'C'));
}
// Reading data followed by a remote close should not lose data.
TEST_F(IncomingStreamTest, ReadThenClosedWithFin) {
V8TestingScope scope;
auto* incoming_stream = CreateIncomingStream(scope);
EXPECT_CALL(mock_on_abort_, Run(std::optional<uint8_t>()));
auto* script_state = scope.GetScriptState();
auto* reader = incoming_stream->Readable()->GetDefaultReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
WriteToPipe({'B'});
incoming_stream->OnIncomingStreamClosed(true);
Iterator result1 = Read(scope, reader);
EXPECT_FALSE(result1.done);
EXPECT_THAT(result1.value, ElementsAre('B'));
// This write arrives "out of order" due to the data pipe not being
// synchronised with the mojo interface.
WriteToPipe({'C'});
ClosePipe();
Iterator result2 = Read(scope, reader);
EXPECT_FALSE(result2.done);
EXPECT_THAT(result2.value, ElementsAre('C'));
Iterator result3 = Read(scope, reader);
EXPECT_TRUE(result3.done);
}
// Reading data followed by a remote abort should not lose data.
TEST_F(IncomingStreamTest, ReadThenClosedWithoutFin) {
V8TestingScope scope;
auto* incoming_stream = CreateIncomingStream(scope);
EXPECT_CALL(mock_on_abort_, Run(std::optional<uint8_t>()));
auto* script_state = scope.GetScriptState();
auto* reader = incoming_stream->Readable()->GetDefaultReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
WriteToPipe({'B'});
incoming_stream->OnIncomingStreamClosed(false);
Iterator result1 = Read(scope, reader);
EXPECT_FALSE(result1.done);
EXPECT_THAT(result1.value, ElementsAre('B'));
// This write arrives "out of order" due to the data pipe not being
// synchronized with the mojo interface.
WriteToPipe({'C'});
ClosePipe();
Iterator result2 = Read(scope, reader);
EXPECT_FALSE(result2.done);
// Even if the stream is not cleanly closed, we still endeavour to deliver all
// data.
EXPECT_THAT(result2.value, ElementsAre('C'));
auto result3 = reader->read(script_state, ASSERT_NO_EXCEPTION);
ScriptPromiseTester result3_tester(script_state, result3);
result3_tester.WaitUntilSettled();
EXPECT_TRUE(result3_tester.IsRejected());
DOMException* exception = V8DOMException::ToWrappable(
scope.GetIsolate(), result3_tester.Value().V8Value());
ASSERT_TRUE(exception);
EXPECT_EQ(exception->code(),
static_cast<uint16_t>(DOMExceptionCode::kNetworkError));
EXPECT_EQ(exception->message(),
"The stream was aborted by the remote server");
}
// Reading after remote close should not lose data.
TEST_F(IncomingStreamTest, ClosedWithFinThenRead) {
V8TestingScope scope;
auto* incoming_stream = CreateIncomingStream(scope);
EXPECT_CALL(mock_on_abort_, Run(std::optional<uint8_t>()));
auto* script_state = scope.GetScriptState();
auto* reader = incoming_stream->Readable()->GetDefaultReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
WriteToPipe({'B'});
incoming_stream->OnIncomingStreamClosed(true);
ClosePipe();
Iterator result1 = Read(scope, reader);
EXPECT_FALSE(result1.done);
EXPECT_THAT(result1.value, ElementsAre('B'));
Iterator result2 = Read(scope, reader);
EXPECT_TRUE(result2.done);
}
// reader.closed is fulfilled without any read() call, when the stream is empty.
TEST_F(IncomingStreamTest, ClosedWithFinWithoutRead) {
V8TestingScope scope;
auto* incoming_stream = CreateIncomingStream(scope);
EXPECT_CALL(mock_on_abort_, Run(std::optional<uint8_t>()));
auto* script_state = scope.GetScriptState();
auto* reader = incoming_stream->Readable()->GetDefaultReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
incoming_stream->OnIncomingStreamClosed(true);
ClosePipe();
ScriptPromiseTester tester(script_state, reader->closed(script_state));
tester.WaitUntilSettled();
EXPECT_TRUE(tester.IsFulfilled());
}
TEST_F(IncomingStreamTest, DataPipeResetBeforeClosedWithFin) {
V8TestingScope scope;
auto* incoming_stream = CreateIncomingStream(scope);
EXPECT_CALL(mock_on_abort_, Run(std::optional<uint8_t>()));
auto* script_state = scope.GetScriptState();
auto* reader = incoming_stream->Readable()->GetDefaultReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
WriteToPipe({'E'});
ClosePipe();
incoming_stream->OnIncomingStreamClosed(true);
Iterator result1 = Read(scope, reader);
EXPECT_FALSE(result1.done);
EXPECT_THAT(result1.value, ElementsAre('E'));
Iterator result2 = Read(scope, reader);
EXPECT_TRUE(result2.done);
}
TEST_F(IncomingStreamTest, DataPipeResetBeforeClosedWithoutFin) {
V8TestingScope scope;
auto* incoming_stream = CreateIncomingStream(scope);
EXPECT_CALL(mock_on_abort_, Run(std::optional<uint8_t>()));
auto* script_state = scope.GetScriptState();
auto* reader = incoming_stream->Readable()->GetDefaultReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
WriteToPipe({'F'});
ClosePipe();
incoming_stream->OnIncomingStreamClosed(false);
Iterator result1 = Read(scope, reader);
EXPECT_FALSE(result1.done);
EXPECT_THAT(result1.value, ElementsAre('F'));
auto result2 = reader->read(script_state, ASSERT_NO_EXCEPTION);
ScriptPromiseTester result2_tester(script_state, result2);
result2_tester.WaitUntilSettled();
EXPECT_TRUE(result2_tester.IsRejected());
DOMException* exception = V8DOMException::ToWrappable(
scope.GetIsolate(), result2_tester.Value().V8Value());
ASSERT_TRUE(exception);
EXPECT_EQ(exception->code(),
static_cast<uint16_t>(DOMExceptionCode::kNetworkError));
EXPECT_EQ(exception->message(),
"The stream was aborted by the remote server");
}
TEST_F(IncomingStreamTest, WriteToPipeWithPendingRead) {
V8TestingScope scope;
auto* incoming_stream = CreateIncomingStream(scope);
auto* script_state = scope.GetScriptState();
auto* reader = incoming_stream->Readable()->GetDefaultReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
auto read_promise = reader->read(script_state, ASSERT_NO_EXCEPTION);
ScriptPromiseTester tester(script_state, read_promise);
test::RunPendingTasks();
WriteToPipe({'A'});
tester.WaitUntilSettled();
EXPECT_TRUE(tester.IsFulfilled());
Iterator result = IteratorFromReadResult(scope, tester.Value().V8Value());
EXPECT_FALSE(result.done);
EXPECT_THAT(result.value, ElementsAre('A'));
}
TEST_F(IncomingStreamTest, Cancel) {
V8TestingScope scope;
ScriptState* script_state = scope.GetScriptState();
auto* incoming_stream = CreateIncomingStream(scope);
EXPECT_CALL(mock_on_abort_, Run(std::make_optional<uint8_t>(0)));
auto* reader = incoming_stream->Readable()->GetDefaultReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
auto promise = reader->cancel(script_state, ASSERT_NO_EXCEPTION);
ScriptPromiseTester tester(script_state, promise);
test::RunPendingTasks();
tester.WaitUntilSettled();
EXPECT_TRUE(tester.IsFulfilled());
}
TEST_F(IncomingStreamTest, CancelWithWebTransportError) {
V8TestingScope scope;
ScriptState* script_state = scope.GetScriptState();
v8::Isolate* isolate = scope.GetIsolate();
auto* incoming_stream = CreateIncomingStream(scope);
EXPECT_CALL(mock_on_abort_, Run(std::make_optional<uint8_t>(0)));
v8::Local<v8::Value> error =
WebTransportError::Create(isolate,
/*stream_error_code=*/std::nullopt, "foobar",
V8WebTransportErrorSource::Enum::kStream);
auto* reader = incoming_stream->Readable()->GetDefaultReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
auto promise = reader->cancel(script_state, ScriptValue(isolate, error),
ASSERT_NO_EXCEPTION);
ScriptPromiseTester tester(script_state, promise);
test::RunPendingTasks();
tester.WaitUntilSettled();
EXPECT_TRUE(tester.IsFulfilled());
}
TEST_F(IncomingStreamTest, CancelWithWebTransportErrorWithCode) {
V8TestingScope scope;
ScriptState* script_state = scope.GetScriptState();
v8::Isolate* isolate = scope.GetIsolate();
auto* incoming_stream = CreateIncomingStream(scope);
EXPECT_CALL(mock_on_abort_, Run(std::make_optional<uint8_t>(19)));
v8::Local<v8::Value> error =
WebTransportError::Create(isolate,
/*stream_error_code=*/19, "foobar",
V8WebTransportErrorSource::Enum::kStream);
auto* reader = incoming_stream->Readable()->GetDefaultReaderForTesting(
script_state, ASSERT_NO_EXCEPTION);
auto promise = reader->cancel(script_state, ScriptValue(isolate, error),
ASSERT_NO_EXCEPTION);
ScriptPromiseTester tester(script_state, promise);
test::RunPendingTasks();
tester.WaitUntilSettled();
EXPECT_TRUE(tester.IsFulfilled());
}
} // namespace
} // namespace blink
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