lostluck commented on a change in pull request #11413: [BEAM-9746] check for 0
length copies from state
URL: https://github.com/apache/beam/pull/11413#discussion_r408468620
##########
File path: sdks/go/pkg/beam/core/runtime/harness/statemgr_test.go
##########
@@ -258,6 +261,167 @@ func TestStateChannel(t *testing.T) {
}
}
+// TestStateKeyReader validates ordinary Read cases
+func TestStateKeyReader(t *testing.T) {
+ const readLen = 4
+ tests := []struct {
+ name string
+ buflens []int // sizes of the buffers received on the state
channel.
+ numReads int
+ closed bool // tries to read from closed reader
+ noGet bool // tries to read from nil get response reader
+ }{
+ {
+ name: "emptyData",
+ buflens: []int{-1},
+ numReads: 1,
+ }, {
+ name: "singleBufferSingleRead",
+ buflens: []int{readLen},
+ numReads: 2,
+ }, {
+ name: "singleBufferMultipleReads",
+ buflens: []int{2 * readLen},
+ numReads: 3,
+ }, {
+ name: "singleBufferShortRead",
+ buflens: []int{readLen - 1},
+ numReads: 2,
+ }, {
+ name: "multiBuffer",
+ buflens: []int{readLen, readLen},
+ numReads: 3,
+ }, {
+ name: "multiBuffer-short-reads",
+ buflens: []int{readLen - 1, readLen - 1, readLen - 2},
+ numReads: 4,
+ }, {
+ name: "emptyDataFirst", // Shouldn't happen, but
not unreasonable to handle.
+ buflens: []int{-1, readLen, readLen},
+ numReads: 4,
+ }, {
+ name: "emptyDataMid", // Shouldn't happen, but not
unreasonable to handle.
+ buflens: []int{readLen, readLen, -1, readLen},
+ numReads: 5,
+ }, {
+ name: "emptyDataLast", // Shouldn't happen, but not
unreasonable to handle.
+ buflens: []int{readLen, readLen, -1},
+ numReads: 3,
+ }, {
+ name: "emptyDataLast-short",
+ buflens: []int{3*readLen - 2, -1},
+ numReads: 4,
+ }, {
+ name: "closed",
+ buflens: []int{-1, -1},
+ numReads: 1,
+ closed: true,
+ }, {
+ name: "noGet",
+ buflens: []int{-1},
+ numReads: 1,
+ noGet: true,
+ },
+ }
+ for _, test := range tests {
+ t.Run(test.name, func(t *testing.T) {
+ ctx, cancelFn :=
context.WithCancel(context.Background())
+ ch := &StateChannel{
+ id: "test",
+ requests: make(chan *fnpb.StateRequest),
+ responses: make(map[string]chan<-
*fnpb.StateResponse),
+ cancelFn: cancelFn,
+ DoneCh: ctx.Done(),
+ }
+
+ // Handle the channel behavior asynchronously.
+ go func() {
+ for i := 0; i < len(test.buflens); i++ {
+ token := []byte(strconv.Itoa(i))
+ var buf []byte
+ if test.buflens[i] >= 0 {
+ buf = bytes.Repeat([]byte{42},
test.buflens[i])
+ }
+ // On the last request response pair,
send no token.
+ if i+1 == len(test.buflens) {
+ token = nil
+ }
Review comment:
Great suggestions. Done.
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
With regards,
Apache Git Services
