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streams_map_outgoing_generic_test.go
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streams_map_outgoing_generic_test.go
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package quic
import (
"errors"
"github.com/golang/mock/gomock"
"github.com/boisjacques/qed/internal/protocol"
"github.com/boisjacques/qed/internal/qerr"
"github.com/boisjacques/qed/internal/wire"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = Describe("Streams Map (outgoing)", func() {
const firstNewStream protocol.StreamID = 3
var (
m *outgoingItemsMap
newItem func(id protocol.StreamID) item
mockSender *MockStreamSender
)
BeforeEach(func() {
newItem = func(id protocol.StreamID) item {
return &mockGenericStream{id: id}
}
mockSender = NewMockStreamSender(mockCtrl)
m = newOutgoingItemsMap(firstNewStream, newItem, mockSender.queueControlFrame)
})
Context("no stream ID limit", func() {
BeforeEach(func() {
m.SetMaxStream(0xffffffff)
})
It("opens streams", func() {
str, err := m.OpenStream()
Expect(err).ToNot(HaveOccurred())
Expect(str.(*mockGenericStream).id).To(Equal(firstNewStream))
str, err = m.OpenStream()
Expect(err).ToNot(HaveOccurred())
Expect(str.(*mockGenericStream).id).To(Equal(firstNewStream + 4))
})
It("doesn't open streams after it has been closed", func() {
testErr := errors.New("close")
m.CloseWithError(testErr)
_, err := m.OpenStream()
Expect(err).To(MatchError(testErr))
})
It("gets streams", func() {
_, err := m.OpenStream()
Expect(err).ToNot(HaveOccurred())
str, err := m.GetStream(firstNewStream)
Expect(err).ToNot(HaveOccurred())
Expect(str.(*mockGenericStream).id).To(Equal(firstNewStream))
})
It("errors when trying to get a stream that has not yet been opened", func() {
_, err := m.GetStream(firstNewStream)
Expect(err).To(MatchError(qerr.Error(qerr.InvalidStreamID, "peer attempted to open stream 3")))
})
It("deletes streams", func() {
_, err := m.OpenStream() // opens firstNewStream
Expect(err).ToNot(HaveOccurred())
err = m.DeleteStream(firstNewStream)
Expect(err).ToNot(HaveOccurred())
str, err := m.GetStream(firstNewStream)
Expect(err).ToNot(HaveOccurred())
Expect(str).To(BeNil())
})
It("errors when deleting a non-existing stream", func() {
err := m.DeleteStream(1337)
Expect(err).To(MatchError("Tried to delete unknown stream 1337"))
})
It("errors when deleting a stream twice", func() {
_, err := m.OpenStream() // opens firstNewStream
Expect(err).ToNot(HaveOccurred())
err = m.DeleteStream(firstNewStream)
Expect(err).ToNot(HaveOccurred())
err = m.DeleteStream(firstNewStream)
Expect(err).To(MatchError("Tried to delete unknown stream 3"))
})
It("closes all streams when CloseWithError is called", func() {
str1, err := m.OpenStream()
Expect(err).ToNot(HaveOccurred())
str2, err := m.OpenStream()
Expect(err).ToNot(HaveOccurred())
testErr := errors.New("test err")
m.CloseWithError(testErr)
Expect(str1.(*mockGenericStream).closed).To(BeTrue())
Expect(str1.(*mockGenericStream).closeErr).To(MatchError(testErr))
Expect(str2.(*mockGenericStream).closed).To(BeTrue())
Expect(str2.(*mockGenericStream).closeErr).To(MatchError(testErr))
})
})
Context("with stream ID limits", func() {
It("errors when no stream can be opened immediately", func() {
mockSender.EXPECT().queueControlFrame(gomock.Any())
_, err := m.OpenStream()
Expect(err).To(MatchError(qerr.TooManyOpenStreams))
})
It("blocks until a stream can be opened synchronously", func() {
mockSender.EXPECT().queueControlFrame(gomock.Any())
done := make(chan struct{})
go func() {
defer GinkgoRecover()
str, err := m.OpenStreamSync()
Expect(err).ToNot(HaveOccurred())
Expect(str.(*mockGenericStream).id).To(Equal(firstNewStream))
close(done)
}()
Consistently(done).ShouldNot(BeClosed())
m.SetMaxStream(firstNewStream)
Eventually(done).Should(BeClosed())
})
It("works with stream 0", func() {
m = newOutgoingItemsMap(0, newItem, mockSender.queueControlFrame)
mockSender.EXPECT().queueControlFrame(gomock.Any()).Do(func(f wire.Frame) {
Expect(f.(*wire.StreamsBlockedFrame).StreamLimit).To(BeZero())
})
done := make(chan struct{})
go func() {
defer GinkgoRecover()
str, err := m.OpenStreamSync()
Expect(err).ToNot(HaveOccurred())
Expect(str.(*mockGenericStream).id).To(BeZero())
close(done)
}()
Consistently(done).ShouldNot(BeClosed())
m.SetMaxStream(0)
Eventually(done).Should(BeClosed())
})
It("stops opening synchronously when it is closed", func() {
mockSender.EXPECT().queueControlFrame(gomock.Any())
testErr := errors.New("test error")
done := make(chan struct{})
go func() {
defer GinkgoRecover()
_, err := m.OpenStreamSync()
Expect(err).To(MatchError(testErr))
close(done)
}()
Consistently(done).ShouldNot(BeClosed())
m.CloseWithError(testErr)
Eventually(done).Should(BeClosed())
})
It("doesn't reduce the stream limit", func() {
m.SetMaxStream(firstNewStream + 4)
m.SetMaxStream(firstNewStream)
_, err := m.OpenStream()
Expect(err).ToNot(HaveOccurred())
str, err := m.OpenStream()
Expect(err).ToNot(HaveOccurred())
Expect(str.(*mockGenericStream).id).To(Equal(firstNewStream + 4))
})
It("queues a STREAM_ID_BLOCKED frame if no stream can be opened", func() {
m.SetMaxStream(firstNewStream + 5*4)
// open the 6 allowed streams
for i := 0; i < 6; i++ {
_, err := m.OpenStream()
Expect(err).ToNot(HaveOccurred())
}
mockSender.EXPECT().queueControlFrame(gomock.Any()).Do(func(f wire.Frame) {
Expect(f.(*wire.StreamsBlockedFrame).StreamLimit).To(BeEquivalentTo(6))
})
_, err := m.OpenStream()
Expect(err).To(MatchError(qerr.TooManyOpenStreams))
})
It("only sends one STREAM_ID_BLOCKED frame for one stream ID", func() {
m.SetMaxStream(firstNewStream)
mockSender.EXPECT().queueControlFrame(gomock.Any()).Do(func(f wire.Frame) {
Expect(f.(*wire.StreamsBlockedFrame).StreamLimit).To(BeEquivalentTo(1))
})
_, err := m.OpenStream()
Expect(err).ToNot(HaveOccurred())
// try to open a stream twice, but expect only one STREAM_ID_BLOCKED to be sent
_, err = m.OpenStream()
Expect(err).To(MatchError(qerr.TooManyOpenStreams))
_, err = m.OpenStream()
Expect(err).To(MatchError(qerr.TooManyOpenStreams))
})
})
})