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// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package pubsub
import (
"context"
"testing"
"time"
"cloud.google.com/go/internal/testutil"
"cloud.google.com/go/pubsub/pstest"
gax "github.com/googleapis/gax-go/v2"
"google.golang.org/api/option"
pb "google.golang.org/genproto/googleapis/pubsub/v1"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
func TestPullStreamGet(t *testing.T) {
// Test that we retry on the initial Send call from pullstream.get. We don't do this
// test with the server in fake_test.go because there's no clear way to get Send
// to fail from the server.
t.Parallel()
for _, test := range []struct {
desc string
errors []error
wantCode codes.Code
}{
{
desc: "nil error",
errors: []error{nil},
wantCode: codes.OK,
},
{
desc: "non-retryable error",
errors: []error{status.Errorf(codes.InvalidArgument, "")},
wantCode: codes.InvalidArgument,
},
{
desc: "retryable errors",
errors: []error{
status.Errorf(codes.Unavailable, "first"),
status.Errorf(codes.Unavailable, "second"),
nil,
},
wantCode: codes.OK,
},
} {
streamingPull := func(context.Context, ...gax.CallOption) (pb.Subscriber_StreamingPullClient, error) {
if len(test.errors) == 0 {
panic("out of errors")
}
err := test.errors[0]
test.errors = test.errors[1:]
return &testStreamingPullClient{sendError: err}, nil
}
ps := newPullStream(context.Background(), streamingPull, "")
_, err := ps.get(nil)
if got := status.Code(err); got != test.wantCode {
t.Errorf("%s: got %s, want %s", test.desc, got, test.wantCode)
}
}
}
func TestPullStreamGet_ResourceUnavailable(t *testing.T) {
ctx := context.Background()
srv, err := testutil.NewServer()
if err != nil {
t.Fatal(err)
}
defer srv.Close()
ps := pstest.NewServer()
defer ps.Close()
s := ExhaustedServer{&ps.GServer}
pb.RegisterPublisherServer(srv.Gsrv, &s)
pb.RegisterSubscriberServer(srv.Gsrv, &s)
srv.Start()
opts := withGRPCHeadersAssertion(t,
option.WithEndpoint(srv.Addr),
option.WithoutAuthentication(),
option.WithGRPCDialOption(grpc.WithInsecure()))
client, err := NewClient(ctx, "P", opts...)
if err != nil {
t.Fatal(err)
}
defer client.Close()
errc := make(chan error)
go func() {
errc <- client.Subscription("foo").Receive(ctx, func(context.Context, *Message) {
t.Error("should not have received any data")
})
}()
select {
case <-time.After(5 * time.Second):
t.Fatal("Receive should have failed immediately")
case err := <-errc:
if gerr, ok := status.FromError(err); ok {
if gerr.Code() != codes.ResourceExhausted {
t.Fatal("expected to receive a grpc ResourceExhausted error")
}
} else {
t.Fatal("expected to receive a grpc ResourceExhausted error")
}
}
}
type ExhaustedServer struct {
*pstest.GServer
}
func (*ExhaustedServer) StreamingPull(_ pb.Subscriber_StreamingPullServer) error {
return status.Errorf(codes.ResourceExhausted, "This server is exhausted!")
}
type testStreamingPullClient struct {
pb.Subscriber_StreamingPullClient
sendError error
}
func (c *testStreamingPullClient) Send(*pb.StreamingPullRequest) error { return c.sendError }
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