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

components/cqrs/event_handler_test.go

@@ -0,0 +1,48 @@
+package cqrs_test
+
+import (
+	"context"
+	"fmt"
+	"testing"
+
+	"github.com/ThreeDotsLabs/watermill/components/cqrs"
+	"github.com/stretchr/testify/assert"
+)
+
+type SomeEvent struct {
+	Foo string
+}
+
+func TestNewEventHandler(t *testing.T) {
+	cmdToSend := &SomeEvent{"bar"}
+
+	ch := cqrs.NewEventHandler(
+		"some_handler",
+		func(ctx context.Context, cmd *SomeEvent) error {
+			assert.Equal(t, cmdToSend, cmd)
+			return fmt.Errorf("some error")
+		},
+	)
+
+	assert.Equal(t, "some_handler", ch.HandlerName())
+	assert.Equal(t, &SomeEvent{}, ch.NewEvent())
+
+	err := ch.Handle(context.Background(), cmdToSend)
+	assert.EqualError(t, err, "some error")
+}
+
+func TestNewGroupEventHandler(t *testing.T) {
+	cmdToSend := &SomeEvent{"bar"}
+
+	ch := cqrs.NewGroupEventHandler(
+		func(ctx context.Context, cmd *SomeEvent) error {
+			assert.Equal(t, cmdToSend, cmd)
+			return fmt.Errorf("some error")
+		},
+	)
+
+	assert.Equal(t, &SomeEvent{}, ch.NewEvent())
+
+	err := ch.Handle(context.Background(), cmdToSend)
+	assert.EqualError(t, err, "some error")
+}