feat: mail service

integration/internal/harness/redis_container.go

@@ -0,0 +1,47 @@
+package harness
+
+import (
+	"context"
+	"testing"
+
+	testcontainers "github.com/testcontainers/testcontainers-go"
+	rediscontainer "github.com/testcontainers/testcontainers-go/modules/redis"
+)
+
+const defaultRedisContainerImage = "redis:7"
+
+// RedisRuntime stores one started real Redis container together with the
+// externally reachable endpoint used by black-box suites.
+type RedisRuntime struct {
+	Container *rediscontainer.RedisContainer
+	Addr      string
+}
+
+// StartRedisContainer starts one isolated real Redis container and registers
+// automatic cleanup for the suite.
+func StartRedisContainer(t testing.TB) *RedisRuntime {
+	t.Helper()
+
+	ctx := context.Background()
+
+	container, err := rediscontainer.Run(ctx, defaultRedisContainerImage)
+	if err != nil {
+		t.Fatalf("start redis container: %v", err)
+	}
+
+	t.Cleanup(func() {
+		if err := testcontainers.TerminateContainer(container); err != nil {
+			t.Errorf("terminate redis container: %v", err)
+		}
+	})
+
+	addr, err := container.Endpoint(ctx, "")
+	if err != nil {
+		t.Fatalf("resolve redis container endpoint: %v", err)
+	}
+
+	return &RedisRuntime{
+		Container: container,
+		Addr:      addr,
+	}
+}