Add Nacos import check integration tests.

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-discovery/src/main/java/com/alibaba/cloud/nacos/discovery/ServiceCache.java

@@ -30,7 +30,7 @@ import org.springframework.cloud.client.ServiceInstance;
  * Cache serviceIds and corresponding instances in Nacos.
  *
  * @author freeman
- * @since 2022.0
+ * @since 2021.0.1.0
  */
 public final class ServiceCache {
 

spring-cloud-alibaba-tests/nacos-tests/nacos-config-test/src/main/java/com/alibaba/cloud/tests/nacos/config/NacosConfigTestApplication.java

@@ -16,7 +16,6 @@
 
 package com.alibaba.cloud.tests.nacos.config;
 
-import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 
@@ -27,8 +26,4 @@ import org.springframework.boot.context.properties.EnableConfigurationProperties
 @EnableConfigurationProperties(UserProperties.class)
 public class NacosConfigTestApplication {
 
-	public static void main(String[] args) {
-		SpringApplication.run(NacosConfigTestApplication.class, args);
-	}
-
 }

spring-cloud-alibaba-tests/nacos-tests/nacos-config-test/src/test/java/com/alibaba/cloud/tests/nacos/config/NacosConfigRefreshTest.java

@@ -42,7 +42,7 @@ import static org.springframework.boot.test.context.SpringBootTest.WebEnvironmen
  * @author freeman
  */
 @HasDockerAndItEnabled
-@SpringBootTest(webEnvironment = RANDOM_PORT, properties = {
+@SpringBootTest(classes = NacosConfigTestApplication.class, webEnvironment = RANDOM_PORT, properties = {
 		"spring.profiles.active=nacos-config-refresh"
 })
 @Import(PushConfigConfiguration.class)

spring-cloud-alibaba-tests/nacos-tests/nacos-config-test/src/test/java/com/alibaba/cloud/tests/nacos/config/NacosImportCheckTest.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2013-2022 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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.cloud.tests.nacos.config;
+
+import com.alibaba.cloud.testsupport.HasDockerAndItEnabled;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.builder.SpringApplicationBuilder;
+
+import static org.assertj.core.api.Assertions.assertThatCode;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+import static org.springframework.cloud.commons.ConfigDataMissingEnvironmentPostProcessor.ImportException;
+
+/**
+ *
+ * @author freeman
+ */
+@HasDockerAndItEnabled
+public class NacosImportCheckTest {
+
+	@Test
+	public void testImportCheckEnabled() {
+		assertThatExceptionOfType(ImportException.class).isThrownBy(
+				() -> new SpringApplicationBuilder(NacosConfigTestApplication.class)
+						.properties("server.port=0")
+						.properties("spring.application.name=import-check-enabled")
+						.run());
+	}
+
+	@Test
+	public void testImportCheckDisabled() {
+		assertThatCode(
+				() -> new SpringApplicationBuilder(NacosConfigTestApplication.class)
+						.properties("server.port=0")
+						.properties("spring.application.name=import-check-disabled")
+						.properties(
+								"spring.cloud.nacos.config.import-check.enabled=false")
+						.run()).doesNotThrowAnyException();
+	}
+
+}