编写 JUnit 4 测试类来测试 Apache Camel 路由

Question

我有一个用于 cron 工作目的的 Maven 项目，我必须为测试类编写逻辑，以通过 JUnit 4 测试 Apache Camel 路由。该应用程序运行良好。我正在编写第一次测试课程。我该如何写逻辑？这是课程。

import org.apache.camel.builder.RouteBuilder;
import org.springframework.beans.factory.annotation.Value;

import com.abc.common.MalLogger;
import com.abc.common.MalLoggerFactory;
import com.abc.processing.processors.DataRoutingProcess;

public class DataInputRoute extends RouteBuilder {
    private AbcLogger logger = AbcLoggerFactory.getLogger(this.getClass());

    private String  dataFtpUrl;
    private String  dataLocalPath;

    public DataInputRoute(@Value("${data.ftp.url}") String dataFtpUrl,@Value("${data.local.path}") String dataLocalPath) {
        this.dataFtpUrl = dataFtpUrl;
        this.dataLocalPath = dataLocalPath;
    }

    @Override
    public void configure() throws Exception {
        logger.info("Begin the route configure the data processing.");
        //errorHandler(deadLetterChannel("com.abc.processing"));
        from("file:"+dataFtpUrl)
        .to("file:"+dataLocalPath)
        .to("direct:datastagedFiles");

        from("direct:datastagedFiles")
        .to("bean:jobHandHandler")
        .dynamicRouter(method(DataRoutingProcess.class, "determineRoute"));
        logger.info("End route configures the data processing.");
    }

}

这是我创建的测试类。

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.mockito.ArgumentMatchers.anyObject;
import static org.mockito.Mockito.when;
import org.apache.camel.builder.RouteBuilder;
import org.apache.log4j.Logger;
import org.junit.Test;
import com.abc.processing.processors.DataRoutingProcess;
import com.abc.processing.routes.DataInputRoute;

public class DataInputRouteTest extends RouteBuilder{
    private Logger log = Logger.getLogger(this.getClass());

    @Test
    public void configure() {
        try {
            log.info("Starting execution of configure");

            DataInputRoute datainputroute = new DataInputRoute();
            datainputroute.configure();
            assertTrue(true);
        } catch (Exception exception) {
            log.error("Exception in execution of configure-" + exception, exception);
            exception.printStackTrace();
            assertFalse(false);
        }
    }
}

Answer 1

要使用 JUnit 测试 Apache Camel 路由，可以使用 Camel 提供的 CamelTestSupport 类。以下是如何为 DataInputRoute 编写测试类的示例：

import org.apache.camel.CamelContext;
import org.apache.camel.builder.AdviceWithRouteBuilder;
import org.apache.camel.test.junit4.CamelTestSupport;
import org.junit.Test;
import org.mockito.Mockito;

public class DataInputRouteTest extends CamelTestSupport {

    @Test
    public void testRoute() throws Exception {
        // Mock any external beans or endpoints as needed
        context.getRegistry().bind("jobHandHandler", Mockito.mock(JobHandHandler.class));

        // Use AdviceWith to modify the route for testing
        context.getRouteDefinition("dataInputRoute").adviceWith(context, new AdviceWithRouteBuilder() {
            @Override
            public void configure() throws Exception {
                // We replace the "file:" endpoint with a "direct:" endpoint for testing
                replaceFromWith("direct:start");
            }
        });

        // Start Camel context
        context.start();

        // Prepare a test message
        template.sendBody("direct:start", "Test message");

        // Ensure that the mock endpoint received the message
        mock.assertIsSatisfied();
    }

    @Override
    protected CamelContext createCamelContext() throws Exception {
        // Override this method to provide your own Camel context with necessary components
        // For simplicity, you can use the default Camel context
        return super.createCamelContext();
    }

    @Override
    protected RouteBuilder[] createRouteBuilders() throws Exception {
        // Create an instance of your route for testing
        DataInputRoute dataInputRoute = new DataInputRoute("mock:ftpEndpoint", "mock:localPath");

        // Return the route for testing
        return new RouteBuilder[]{dataInputRoute};
    }
}

此示例假设您有一个在路线中使用的 JobHandHandler 类。确保根据您的路由配置将“mock:ftpEndpoint”和“mock:localPath”替换为适当的端点。

该测试类使用Camel的CamelTestSupport和Mockito来模拟外部组件。 AdviceWithRouteBuilder 允许您修改测试路由。在此示例中，“file:”端点替换为“direct:”端点以简化测试。