From 79c91d49eb1887810705828730c095613c820158 Mon Sep 17 00:00:00 2001
From: Ns <397827222@qq.com>
Date: Fri, 19 Jun 2026 17:56:33 +0800
Subject: [PATCH] test: cover OTLP gRPC metrics exporter

---
 .../exporter/OTLPMetricsExporterTest.java     | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 automq-metrics/src/test/java/com/automq/opentelemetry/exporter/OTLPMetricsExporterTest.java

diff --git a/automq-metrics/src/test/java/com/automq/opentelemetry/exporter/OTLPMetricsExporterTest.java b/automq-metrics/src/test/java/com/automq/opentelemetry/exporter/OTLPMetricsExporterTest.java
new file mode 100644
index 0000000000..ff71106d2c
--- /dev/null
+++ b/automq-metrics/src/test/java/com/automq/opentelemetry/exporter/OTLPMetricsExporterTest.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2026, AutoMQ HK Limited.
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.automq.opentelemetry.exporter;
+
+import com.automq.opentelemetry.common.OTLPCompressionType;
+import com.automq.opentelemetry.common.OTLPProtocol;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
+
+import io.opentelemetry.sdk.metrics.export.MetricReader;
+
+@Tag("S3Unit")
+public class OTLPMetricsExporterTest {
+
+    /**
+     * Given a gRPC OTLP exporter configuration, when the metric reader is built,
+     * then the OpenTelemetry gRPC sender provider must be available on the runtime classpath.
+     */
+    @Test
+    public void testBuildGrpcMetricReaderWithSenderProvider() {
+        OTLPMetricsExporter exporter = new OTLPMetricsExporter(
+            1000,
+            "http://localhost:4317",
+            OTLPProtocol.GRPC.getProtocol(),
+            OTLPCompressionType.NONE.getType()
+        );
+
+        MetricReader reader = exporter.asMetricReader();
+        Assertions.assertNotNull(reader);
+        reader.shutdown();
+    }
+}