Added integration test to basic example

Author: alex268

basic_example/pom.xml

@@ -30,6 +30,12 @@
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-slf4j-impl</artifactId>
         </dependency>
+
+        <dependency>
+            <groupId>tech.ydb.test</groupId>
+            <artifactId>ydb-junit5-support</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
@@ -52,7 +58,18 @@
                             <mainClass>tech.ydb.example.App</mainClass>
                         </manifest>
                     </archive>
-                </configuration>   
+                </configuration>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <configuration>
+                    <environmentVariables>
+                        <TESTCONTAINERS_REUSE_ENABLE>true</TESTCONTAINERS_REUSE_ENABLE>
+                        <YDB_ANONYMOUS_CREDENTIALS>1</YDB_ANONYMOUS_CREDENTIALS>
+                    </environmentVariables>
+                </configuration>
             </plugin>
         </plugins>
     </build>

basic_example/src/main/java/tech/ydb/example/App.java

@@ -41,7 +41,7 @@ public final class App implements Runnable, AutoCloseable {
     private final String database;
     private final SessionRetryContext retryCtx;
 
-    private App(String connectionString) {
+    App(String connectionString) {
         this.transport = GrpcTransport.forConnectionString(connectionString)
                 .withAuthProvider(CloudAuthHelper.getAuthProviderFromEnviron())
                 .build();

basic_example/src/main/resources/log4j2.xml

@@ -2,30 +2,21 @@
 <Configuration status="WARN" shutdownHook="disable">
     <Appenders>
         <Console name="Console" target="SYSTEM_OUT">
-            <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %logger{1} - %msg%n"/>
+            <PatternLayout pattern="[%level] %d{HH:mm:ss.SSS} %logger - %msg%n"/>
         </Console>
     </Appenders>
 
     <Loggers>
-        <Logger name="io.netty" level="warn" additivity="false">
-            <AppenderRef ref="Console"/>
-        </Logger>
-        <Logger name="io.grpc.netty" level="warn" additivity="false">
-            <AppenderRef ref="Console"/>
-        </Logger>
-        <Logger name="tech.ydb.core.grpc" level="info" additivity="false">
-            <AppenderRef ref="Console"/>
-        </Logger>
-        <Logger name="tech.ydb.table" level="info" additivity="false">
-            <AppenderRef ref="Console"/>
-        </Logger>
-        <Logger name="tech.ydb.table.SessionRetryContext" level="info" additivity="false">
-            <AppenderRef ref="Console"/>
-        </Logger>
-        <Logger name="tech.ydb.table.Session" level="info" additivity="false">
+        <!-- https://www.testcontainers.org/supported_docker_environment/logging_config/ -->
+        <Logger name="org.testcontainers" level="warn" />
+        <Logger name="com.github.dockerjava" level="warn"/>
+        <Logger name="com.github.dockerjava.zerodep.shaded.org.apache.hc.client5.http.wire" level="off"/>
+
+        <Logger name="io.grpc" level="warn" additivity="false">
             <AppenderRef ref="Console"/>
         </Logger>
-        <Logger name="tech.ydb.topic" level="info" additivity="false">
+
+        <Logger name="tech.ydb" level="info" additivity="false">
             <AppenderRef ref="Console"/>
         </Logger>
 

basic_example/src/test/java/tech/ydb/example/BasicExampleTest.java

@@ -0,0 +1,30 @@
+package tech.ydb.example;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import tech.ydb.test.junit5.YdbHelperExtension;
+
+/**
+ *
+ * @author Aleksandr Gorshenin
+ */
+public class BasicExampleTest {
+    @RegisterExtension
+    private static final YdbHelperExtension ydb = new YdbHelperExtension();
+
+    private static String connectionString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append(ydb.useTls() ? "grpcs://" : "grpc://" );
+        sb.append(ydb.endpoint());
+        sb.append(ydb.database());
+        return sb.toString();
+    }
+
+    @Test
+    public void testBasicApp() {
+        App app = new App(connectionString());
+        app.run();
+        app.close();
+    }
+}