[每日一学]apache camel|BDD方式开发apache camel|Groovy|Spock

Posted 2020-07-03 thinking different

开发apache camel应用，最好的方式就是tdd,因为camel的每个组件都是相互独立并可测试的。

现在有很多好的测试框架，用groovy的Spock框架的BDD（行为测试驱动）是比较优秀和好用的。

首先， 我们从最简单的processor开始。

先写测试用例：

 package com.github.eric.camel

import org.apache.camel.Exchange
import org.apache.camel.impl.DefaultCamelContext
import org.apache.camel.impl.DefaultExchange
import spock.lang.Specification

/**
* Created by eric567 on 4/2/2016.
*/
class MyProcessorTest extends Specification {
def "Process"() {
given: "new MyProcessor,new Exchange of not null body "
def DefaultCamelContext contex=DefaultCamelContext.newInstance();
def Exchange exchange= DefaultExchange.newInstance(contex)

exchange.getIn().setBody("test");
def MyProcessor myProcessor=new MyProcessor()
when:"the body of exchange.in() is not null"


then:"set the body to exchange.out()"

def Exchange ex=myProcessor.doProcess(exchange)
ex.getIn().getBody(String.class)!=null
ex.getIn().getBody(String.class).equals("test")


}
}

以下是被测试的代码 :

package com.github.eric.camel;

import org.apache.camel.Exchange;
import org.apache.camel.Processor;

/**
 * Created by eric567 on 4/2/2016.
 */
public class MyProcessor implements Processor {
    @Override
    public void process(Exchange exchange) throws Exception {
        String in = exchange.getIn(String.class);
        if(in!=null)
    {
        exchange.getOut().setBody(in);
    }
    }

    public Exchange doProcess(Exchange exchange) throws Exception {
        process(exchange);
        return exchange;
    }
}

因为Processor本身没有返回值，这里加了一个方法：doProcess用来返回exchange 对象，使 MyProcessor变得更好测试。
运行上面的spock测试用例，应该可以看到令人激动的绿色。cheers!!!