Fix XAUTOCLAIM skipping the initial start message.

Author: kgunning

cmd_stream.go

@@ -1536,7 +1536,7 @@ func xautoclaim(
 		return nextCallId, nil
 	}
 
-	msgs := g.pendingAfter(start)
+	msgs := g.pendingAfterOrEqual(start)
 	var res []StreamEntry
 	for i, p := range msgs {
 		if minIdleTime > 0 && now.Before(p.lastDelivery.Add(minIdleTime)) {

cmd_stream_test.go

@@ -1322,6 +1322,21 @@ func TestStreamAutoClaim(t *testing.T) {
 			proto.Array(),
 		),
 	)
+
+	// read again using the ID returned from the last XAUTOCLAIM call as 'start'.
+	// the results include that starting message. unlike XREADGROUP, the results of XAUTOCLAIM
+	// are INCLUSIVE of the start ID.
+	mustDo(t, c,
+		"XAUTOCLAIM", "planets", "processing", "bob", "15000", "0-2", "COUNT", "1",
+		proto.Array(
+			proto.String("0-0"),
+			proto.Array(
+				proto.Array(proto.String("0-2"), proto.Strings("name", "Venus")),
+			),
+			proto.Array(),
+		),
+	)
+
 	mustDo(t, c,
 		"XINFO", "CONSUMERS", "planets", "processing",
 		proto.Array(
@@ -1350,8 +1365,8 @@ func TestStreamAutoClaim(t *testing.T) {
 			proto.Array(
 				proto.String("0-2"),
 				proto.String("bob"),
-				proto.Int(20000),
-				proto.Int(4),
+				proto.Int(0),
+				proto.Int(5),
 			),
 		),
 	)

stream.go

@@ -440,6 +440,13 @@ func (s *streamKey) delete(ids []string) (int, error) {
 	return count, nil
 }
 
+func (g *streamGroup) pendingAfterOrEqual(id string) []pendingEntry {
+	pos := sort.Search(len(g.pending), func(i int) bool {
+		return streamCmp(id, g.pending[i].id) <= 0
+	})
+	return g.pending[pos:]
+}
+
 func (g *streamGroup) pendingAfter(id string) []pendingEntry {
 	pos := sort.Search(len(g.pending), func(i int) bool {
 		return streamCmp(id, g.pending[i].id) < 0