Add test for background to verify no goroutine leaks

background_test.go

@@ -0,0 +1,43 @@
+package asynq
+
+import (
+	"testing"
+	"time"
+
+	"go.uber.org/goleak"
+)
+
+func TestBackground(t *testing.T) {
+	// https://github.com/go-redis/redis/issues/1029
+	ignoreOpt := goleak.IgnoreTopFunction("github.com/go-redis/redis/v7/internal/pool.(*ConnPool).reaper")
+	defer goleak.VerifyNoLeaks(t, ignoreOpt)
+
+	bg := NewBackground(10, &RedisOpt{
+		Addr: "localhost:6379",
+		DB:   15,
+	})
+
+	client := NewClient(&RedisOpt{
+		Addr: "localhost:6379",
+		DB:   15,
+	})
+
+	// no-op handler
+	h := func(task *Task) error {
+		return nil
+	}
+
+	bg.start(h)
+
+	client.Process(&Task{
+		Type:    "send_email",
+		Payload: map[string]interface{}{"recipient_id": 123},
+	}, time.Now())
+
+	client.Process(&Task{
+		Type:    "send_email",
+		Payload: map[string]interface{}{"recipient_id": 456},
+	}, time.Now().Add(time.Hour))
+
+	bg.stop()
+}