feat(queue): add ping function for redis (#991)

* add ping functin for redis

* Update queue/redis/ping_test.go

Co-authored-by: Jacob Floyd <[email protected]>

---------

Co-authored-by: TimHuynh <[email protected]>
Co-authored-by: Jacob Floyd <[email protected]>

queue/redis/ping.go

@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: Apache-2.0
+
+package redis
+
+import (
+	"context"
+	"fmt"
+)
+
+// Ping contacts the queue to test its connection.
+func (c *client) Ping(ctx context.Context) error {
+	// send ping request to client
+	err := c.Redis.Ping(ctx).Err()
+	if err != nil {
+		c.Logger.Debugf("unable to ping Redis queue.")
+		return fmt.Errorf("unable to establish connection to Redis queue")
+	}
+
+	return nil
+}

queue/redis/ping_test.go

@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: Apache-2.0
+
+package redis
+
+import (
+	"context"
+	"fmt"
+	"github.com/alicebob/miniredis/v2"
+	"testing"
+	"time"
+)
+
+func TestRedis_Ping_Good(t *testing.T) {
+	_redis, err := miniredis.Run()
+	if err != nil {
+		t.Errorf("unable to create miniredis instance: %v", err)
+	}
+
+	defer _redis.Close()
+
+	// setup redis mock
+	goodRedis, err := New(
+		WithAddress(fmt.Sprintf("redis://%s", _redis.Addr())),
+		WithChannels("foo"),
+		WithCluster(false),
+		WithTimeout(5*time.Second),
+	)
+	if err != nil {
+		t.Errorf("unable to create queue service: %v", err)
+	}
+
+	// run tests
+	err = goodRedis.Ping(context.Background())
+
+	if err != nil {
+		t.Errorf("Ping returned err: %v", err)
+	}
+}
+
+func TestRedis_Ping_Bad(t *testing.T) {
+	_redis, err := miniredis.Run()
+	if err != nil {
+		t.Errorf("unable to create miniredis instance: %v", err)
+	}
+
+	defer _redis.Close()
+
+	// setup redis mock
+	badRedis, _ := New(
+		WithAddress(fmt.Sprintf("redis://%s", _redis.Addr())),
+		WithChannels("foo"),
+		WithCluster(false),
+		WithTimeout(5*time.Second),
+	)
+	_redis.SetError("not aiv")
+	// run tests
+	err = badRedis.Ping(context.Background())
+	if err == nil {
+		t.Errorf("Ping should have returned err: %v", err)
+	}
+}

queue/service.go

@@ -30,6 +30,10 @@ type Service interface {
 	// item to the specified route in the queue.
 	Push(context.Context, string, []byte) error
 
+	// Ping defines a function that checks the
+	// connection to the queue.
+	Ping(context.Context) error
+
 	// Route defines a function that decides which
 	// channel a build gets placed within the queue.
 	Route(*pipeline.Worker) (string, error)