Fix Dubbo SPI path in Dubbo 3 adapter and improve test cases (#2822)

sentinel-adapter/sentinel-apache-dubbo3-adapter/src/main/resources/META-INF/dubbo/org.apache.dubbo.rpc.Filter

@@ -1 +1 @@
-sentinel.dubbo.provider.filter=com.alibaba.csp.sentinel.adapter.dubbo.SentinelDubboProviderFilter
+sentinel.dubbo.provider.filter=com.alibaba.csp.sentinel.adapter.dubbo3.SentinelDubboProviderFilter

sentinel-adapter/sentinel-apache-dubbo3-adapter/src/main/resources/META-INF/dubbo/org.apache.dubbo.rpc.cluster.filter.ClusterFilter

@@ -1,2 +1,2 @@
-dubbo.application.context.name.filter=com.alibaba.csp.sentinel.adapter.dubbo.DubboAppContextFilter
-sentinel.dubbo.consumer.filter=com.alibaba.csp.sentinel.adapter.dubbo.SentinelDubboConsumerFilter
+dubbo.application.context.name.filter=com.alibaba.csp.sentinel.adapter.dubbo3.DubboAppContextFilter
+sentinel.dubbo.consumer.filter=com.alibaba.csp.sentinel.adapter.dubbo3.SentinelDubboConsumerFilter

sentinel-adapter/sentinel-apache-dubbo3-adapter/src/test/java/com/alibaba/csp/sentinel/adapter/dubbo3/SentinelFilterTest.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed 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.alibaba.csp.sentinel.adapter.dubbo3;
+
+import org.apache.dubbo.rpc.Filter;
+import org.apache.dubbo.rpc.cluster.filter.ClusterFilter;
+import org.apache.dubbo.rpc.model.ApplicationModel;
+import org.apache.dubbo.rpc.model.FrameworkModel;
+import org.apache.dubbo.rpc.model.ModuleModel;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.Set;
+
+public class SentinelFilterTest {
+    @Test
+    public void test() {
+        ApplicationModel applicationModel = FrameworkModel.defaultModel().newApplication();
+        ModuleModel moduleModel = applicationModel.newModule();
+        Set<Filter> filters = moduleModel.getExtensionLoader(Filter.class).getSupportedExtensionInstances();
+        Assert.assertTrue(filters.stream().anyMatch(f -> f instanceof SentinelDubboProviderFilter));
+
+        Set<ClusterFilter> clusterFilters = moduleModel.getExtensionLoader(ClusterFilter.class).getSupportedExtensionInstances();
+        Assert.assertTrue(clusterFilters.stream().anyMatch(f -> f instanceof DubboAppContextFilter));
+        Assert.assertTrue(clusterFilters.stream().anyMatch(f -> f instanceof SentinelDubboConsumerFilter));
+
+        applicationModel.destroy();
+    }
+}