Ilia Denisov
241 lines
7.3 KiB
Go
241 lines
7.3 KiB
Go
package push
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import (
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"context"
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"net"
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"testing"
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"time"
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pushv1 "galaxy/backend/proto/push/v1"
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"github.com/google/uuid"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/credentials/insecure"
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"google.golang.org/grpc/status"
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"google.golang.org/grpc/test/bufconn"
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)
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const bufconnBufferSize = 1024 * 1024
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// startBufconnServer wires svc into an in-process gRPC server reachable
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// through a bufconn dialer. The returned cleanup function stops the
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// server and closes the listener.
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func startBufconnServer(t *testing.T, svc *Service) (pushv1.PushClient, func()) {
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t.Helper()
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lis := bufconn.Listen(bufconnBufferSize)
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server := grpc.NewServer()
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pushv1.RegisterPushServer(server, svc)
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go func() {
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_ = server.Serve(lis)
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}()
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conn, err := grpc.NewClient(
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"passthrough://bufnet",
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grpc.WithContextDialer(func(_ context.Context, _ string) (net.Conn, error) {
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return lis.DialContext(context.Background())
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}),
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grpc.WithTransportCredentials(insecure.NewCredentials()),
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)
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require.NoError(t, err)
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cleanup := func() {
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_ = conn.Close()
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server.Stop()
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_ = lis.Close()
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}
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return pushv1.NewPushClient(conn), cleanup
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}
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func recvOne(t *testing.T, stream pushv1.Push_SubscribePushClient, timeout time.Duration) (*pushv1.PushEvent, error) {
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t.Helper()
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type result struct {
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ev *pushv1.PushEvent
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err error
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}
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ch := make(chan result, 1)
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go func() {
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ev, err := stream.Recv()
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ch <- result{ev, err}
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}()
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select {
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case r := <-ch:
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return r.ev, r.err
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case <-time.After(timeout):
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t.Fatalf("timed out waiting for push event after %s", timeout)
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return nil, nil
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}
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}
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func TestSubscribePushDeliversLiveEvents(t *testing.T) {
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t.Parallel()
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svc, err := NewService(ServiceConfig{FreshnessWindow: time.Minute, RingCapacity: 16, PerConnBuffer: 8}, nil, nil)
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require.NoError(t, err)
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t.Cleanup(svc.Close)
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client, cleanup := startBufconnServer(t, svc)
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defer cleanup()
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stream, err := client.SubscribePush(t.Context(), &pushv1.GatewaySubscribeRequest{GatewayClientId: "gw-1"})
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require.NoError(t, err)
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require.Eventually(t, func() bool { return svc.SubscriberCount() == 1 }, time.Second, 5*time.Millisecond)
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userID := uuid.New()
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require.NoError(t, svc.PublishClientEvent(context.Background(), userID, nil, JSONEvent{EventKind: "k"},"", "", ""))
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ev, err := recvOne(t, stream, time.Second)
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require.NoError(t, err)
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assert.Equal(t, formatCursor(1), ev.Cursor)
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assert.Equal(t, userID.String(), ev.GetClientEvent().UserId)
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}
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func TestSubscribePushReplaysPastEventsOnReconnect(t *testing.T) {
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t.Parallel()
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svc, err := NewService(ServiceConfig{FreshnessWindow: time.Minute, RingCapacity: 16, PerConnBuffer: 8}, nil, nil)
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require.NoError(t, err)
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t.Cleanup(svc.Close)
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userID := uuid.New()
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for range 3 {
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require.NoError(t, svc.PublishClientEvent(context.Background(), userID, nil, JSONEvent{EventKind: "k"},"", "", ""))
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}
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client, cleanup := startBufconnServer(t, svc)
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defer cleanup()
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stream, err := client.SubscribePush(t.Context(), &pushv1.GatewaySubscribeRequest{GatewayClientId: "gw-1", Cursor: formatCursor(1)})
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require.NoError(t, err)
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for i := uint64(2); i <= 3; i++ {
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ev, err := recvOne(t, stream, time.Second)
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require.NoError(t, err)
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assert.Equal(t, formatCursor(i), ev.Cursor)
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}
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}
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func TestSubscribePushSkipsReplayWhenCursorStale(t *testing.T) {
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t.Parallel()
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svc, err := NewService(ServiceConfig{FreshnessWindow: time.Minute, RingCapacity: 2, PerConnBuffer: 8}, nil, nil)
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require.NoError(t, err)
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t.Cleanup(svc.Close)
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userID := uuid.New()
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for range 4 {
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require.NoError(t, svc.PublishClientEvent(context.Background(), userID, nil, JSONEvent{EventKind: "k"},"", "", ""))
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}
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// Ring capacity 2 means cursors 1 and 2 are evicted.
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client, cleanup := startBufconnServer(t, svc)
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defer cleanup()
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stream, err := client.SubscribePush(t.Context(), &pushv1.GatewaySubscribeRequest{GatewayClientId: "gw-1", Cursor: formatCursor(1)})
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require.NoError(t, err)
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require.Eventually(t, func() bool { return svc.SubscriberCount() == 1 }, time.Second, 5*time.Millisecond)
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// Stale cursor → no replay; live publish must arrive.
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require.NoError(t, svc.PublishClientEvent(context.Background(), userID, nil, JSONEvent{EventKind: "k"},"", "", ""))
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ev, err := recvOne(t, stream, time.Second)
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require.NoError(t, err)
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assert.Equal(t, formatCursor(5), ev.Cursor)
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}
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func TestSubscribePushReplacesExistingClientID(t *testing.T) {
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t.Parallel()
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svc, err := NewService(ServiceConfig{FreshnessWindow: time.Minute, RingCapacity: 8, PerConnBuffer: 8}, nil, nil)
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require.NoError(t, err)
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t.Cleanup(svc.Close)
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client, cleanup := startBufconnServer(t, svc)
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defer cleanup()
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stream1, err := client.SubscribePush(t.Context(), &pushv1.GatewaySubscribeRequest{GatewayClientId: "gw-1"})
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require.NoError(t, err)
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require.Eventually(t, func() bool { return svc.SubscriberCount() == 1 }, time.Second, 5*time.Millisecond)
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stream2, err := client.SubscribePush(t.Context(), &pushv1.GatewaySubscribeRequest{GatewayClientId: "gw-1"})
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require.NoError(t, err)
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// First stream must terminate with Aborted.
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_, err = recvOne(t, stream1, time.Second)
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require.Error(t, err)
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assert.Equal(t, codes.Aborted, status.Code(err))
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// Subscriber count returns to one (the replacement).
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require.Eventually(t, func() bool { return svc.SubscriberCount() == 1 }, time.Second, 5*time.Millisecond)
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// Live publish reaches the replacement.
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require.NoError(t, svc.PublishClientEvent(context.Background(), uuid.New(), nil, JSONEvent{EventKind: "k"},"", "", ""))
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ev, err := recvOne(t, stream2, time.Second)
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require.NoError(t, err)
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assert.NotEmpty(t, ev.Cursor)
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}
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func TestSubscribePushRejectsEmptyClientID(t *testing.T) {
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t.Parallel()
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svc, err := NewService(ServiceConfig{FreshnessWindow: time.Minute, RingCapacity: 4, PerConnBuffer: 4}, nil, nil)
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require.NoError(t, err)
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t.Cleanup(svc.Close)
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client, cleanup := startBufconnServer(t, svc)
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defer cleanup()
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stream, err := client.SubscribePush(t.Context(), &pushv1.GatewaySubscribeRequest{})
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require.NoError(t, err)
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_, err = stream.Recv()
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require.Error(t, err)
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assert.Equal(t, codes.InvalidArgument, status.Code(err))
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}
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func TestSubscriptionDeliverDropsOldestOnOverflow(t *testing.T) {
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t.Parallel()
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sub := &subscription{
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clientID: "gw-1",
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ch: make(chan *pushv1.PushEvent, 2),
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done: make(chan struct{}),
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}
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first := mkEvent(1, "a")
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second := mkEvent(2, "b")
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third := mkEvent(3, "c")
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assert.False(t, sub.deliver(first))
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assert.False(t, sub.deliver(second))
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assert.True(t, sub.deliver(third), "third deliver must report a drop")
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got1 := <-sub.ch
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got2 := <-sub.ch
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assert.Equal(t, second, got1, "oldest event (first) was dropped")
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assert.Equal(t, third, got2)
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}
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func TestServiceCloseTerminatesActiveStream(t *testing.T) {
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t.Parallel()
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svc, err := NewService(ServiceConfig{FreshnessWindow: time.Minute, RingCapacity: 4, PerConnBuffer: 4}, nil, nil)
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require.NoError(t, err)
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client, cleanup := startBufconnServer(t, svc)
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defer cleanup()
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stream, err := client.SubscribePush(t.Context(), &pushv1.GatewaySubscribeRequest{GatewayClientId: "gw-1"})
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require.NoError(t, err)
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require.Eventually(t, func() bool { return svc.SubscriberCount() == 1 }, time.Second, 5*time.Millisecond)
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svc.Close()
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_, err = recvOne(t, stream, time.Second)
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require.Error(t, err)
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assert.Equal(t, codes.Aborted, status.Code(err))
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}
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