snapshot of https://github.com/ThreeDotsLabs/watermill.git (master, 2026-09-15; blobs > 131072B omitted)

components/delay/publisher_test.go

@@ -0,0 +1,178 @@
+package delay_test
+
+import (
+	"context"
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/ThreeDotsLabs/watermill/components/delay"
+	"github.com/ThreeDotsLabs/watermill/message"
+	"github.com/ThreeDotsLabs/watermill/pubsub/gochannel"
+)
+
+func TestPublisher(t *testing.T) {
+	pubSub := gochannel.NewGoChannel(gochannel.Config{}, nil)
+
+	messages, err := pubSub.Subscribe(context.Background(), "test")
+	require.NoError(t, err)
+
+	pub, err := delay.NewPublisher(pubSub, delay.PublisherConfig{})
+	require.NoError(t, err)
+
+	pubAllowNoDelay, err := delay.NewPublisher(pubSub, delay.PublisherConfig{
+		AllowNoDelay: true,
+	})
+	require.NoError(t, err)
+
+	defaultDelayPub, err := delay.NewPublisher(pubSub, delay.PublisherConfig{
+		DefaultDelayGenerator: func(params delay.DefaultDelayGeneratorParams) (delay.Delay, error) {
+			return delay.For(1 * time.Second), nil
+		},
+	})
+	require.NoError(t, err)
+
+	testCases := []struct {
+		name               string
+		publisher          message.Publisher
+		messageConstructor func(id string) *message.Message
+		expectedError      bool
+		expectedDelay      time.Duration
+	}{
+		{
+			name:      "no delay",
+			publisher: pub,
+			messageConstructor: func(id string) *message.Message {
+				return message.NewMessage(id, nil)
+			},
+			expectedError: true,
+			expectedDelay: 0,
+		},
+		{
+			name:      "no delay but allowed",
+			publisher: pubAllowNoDelay,
+			messageConstructor: func(id string) *message.Message {
+				return message.NewMessage(id, nil)
+			},
+			expectedDelay: 0,
+		},
+		{
+			name:      "default delay",
+			publisher: defaultDelayPub,
+			messageConstructor: func(id string) *message.Message {
+				return message.NewMessage(id, nil)
+			},
+			expectedDelay: 1 * time.Second,
+		},
+		{
+			name:      "delay from metadata",
+			publisher: pub,
+			messageConstructor: func(id string) *message.Message {
+				msg := message.NewMessage(id, nil)
+				delay.Message(msg, delay.For(2*time.Second))
+				return msg
+			},
+			expectedDelay: 2 * time.Second,
+		},
+		{
+			name:      "default delay override with metadata",
+			publisher: defaultDelayPub,
+			messageConstructor: func(id string) *message.Message {
+				msg := message.NewMessage(id, nil)
+				delay.Message(msg, delay.For(2*time.Second))
+				return msg
+			},
+			expectedDelay: 2 * time.Second,
+		},
+		{
+			name:      "delay from context",
+			publisher: pub,
+			messageConstructor: func(id string) *message.Message {
+				msg := message.NewMessage(id, nil)
+				ctx := delay.WithContext(context.Background(), delay.For(3*time.Second))
+				msg.SetContext(ctx)
+				return msg
+			},
+			expectedDelay: 3 * time.Second,
+		},
+		{
+			name:      "default delay override with context",
+			publisher: defaultDelayPub,
+			messageConstructor: func(id string) *message.Message {
+				msg := message.NewMessage(id, nil)
+				ctx := delay.WithContext(context.Background(), delay.For(3*time.Second))
+				msg.SetContext(ctx)
+				return msg
+			},
+			expectedDelay: 3 * time.Second,
+		},
+		{
+			name:      "delay with until",
+			publisher: pub,
+			messageConstructor: func(id string) *message.Message {
+				msg := message.NewMessage(id, nil)
+				delay.Message(msg, delay.Until(time.Now().UTC().Add(4*time.Second)))
+				return msg
+			},
+			expectedDelay: 4 * time.Second,
+		},
+		{
+			name:      "both metadata and context set",
+			publisher: defaultDelayPub,
+			messageConstructor: func(id string) *message.Message {
+				msg := message.NewMessage(id, nil)
+				delay.Message(msg, delay.For(5*time.Second))
+				ctx := delay.WithContext(context.Background(), delay.For(6*time.Second))
+				msg.SetContext(ctx)
+				return msg
+			},
+			expectedDelay: 5 * time.Second,
+		},
+	}
+
+	for i, testCase := range testCases {
+		t.Run(testCase.name, func(t *testing.T) {
+			id := fmt.Sprint(i)
+
+			msg := testCase.messageConstructor(id)
+			err = testCase.publisher.Publish("test", msg)
+
+			if testCase.expectedError {
+				require.Error(t, err)
+				return
+			}
+
+			require.NoError(t, err)
+			assertMessage(t, messages, id, testCase.expectedDelay)
+		})
+	}
+}
+
+func assertMessage(t *testing.T, messages <-chan *message.Message, expectedID string, expectedDelay time.Duration) {
+	t.Helper()
+	select {
+	case msg := <-messages:
+		assert.Equal(t, expectedID, msg.UUID)
+
+		if expectedDelay == 0 {
+			assert.Empty(t, msg.Metadata.Get(delay.DelayedUntilKey))
+			assert.Empty(t, msg.Metadata.Get(delay.DelayedForKey))
+		} else {
+			delayedFor, err := time.ParseDuration(msg.Metadata.Get(delay.DelayedForKey))
+			require.NoError(t, err)
+			assert.Equal(t, expectedDelay, delayedFor.Round(time.Second))
+
+			delayedUntil, err := time.Parse(time.RFC3339, msg.Metadata.Get(delay.DelayedUntilKey))
+			require.NoError(t, err)
+
+			assert.WithinDuration(t, time.Now().UTC().Add(expectedDelay), delayedUntil, 1*time.Second)
+		}
+
+		msg.Ack()
+	case <-time.After(100 * time.Millisecond):
+		require.Fail(t, "timeout")
+	}
+}