82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
// Copyright 2018 The Go Cloud Development Kit Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package pubsub_test
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import (
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"context"
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"testing"
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"gocloud.dev/pubsub"
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"gocloud.dev/pubsub/driver"
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)
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// scriptedSub returns batches of messages in a predefined order from
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// ReceiveBatch.
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type scriptedSub struct {
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driver.Subscription
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// batches contains slices of messages to return from ReceiveBatch, one
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// after the other.
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batches [][]*driver.Message
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// calls counts how many times ReceiveBatch has been called.
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calls int
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// closed records if Close was called.
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closed bool
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}
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func (s *scriptedSub) ReceiveBatch(ctx context.Context, maxMessages int) ([]*driver.Message, error) {
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b := s.batches[s.calls]
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s.calls++
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return b, nil
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}
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func (s *scriptedSub) SendAcks(ctx context.Context, ackIDs []driver.AckID) error {
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return nil
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}
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func (*scriptedSub) CanNack() bool { return false }
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func (s *scriptedSub) Close() error {
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s.closed = true
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return nil
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}
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func TestReceiveWithEmptyBatchReturnedFromDriver(t *testing.T) {
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ctx := context.Background()
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ds := &scriptedSub{
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batches: [][]*driver.Message{
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// First call gets an empty batch.
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{},
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// Second call gets a non-empty batch.
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{&driver.Message{}},
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},
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}
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sub := pubsub.NewSubscription(ds, nil, nil)
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defer sub.Shutdown(ctx)
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m, err := sub.Receive(ctx)
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if err != nil {
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t.Fatal(err)
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}
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m.Ack()
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}
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func TestSubscriptionCloseIsCalled(t *testing.T) {
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ctx := context.Background()
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ds := &scriptedSub{}
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sub := pubsub.NewSubscription(ds, nil, nil)
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sub.Shutdown(ctx)
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if !ds.closed {
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t.Error("want Subscription.Close to have been called")
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}
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}
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