如何测试Spring Boot中的Drools规则

要在Spring Boot中测试Drools规则，你需要遵循以下步骤：

添加依赖项确保你的项目中包含了以下依赖项：

   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter</artifactId>
</dependency><dependency>
   <groupId>org.drools</groupId>
   <artifactId>drools-compiler</artifactId>
   <version>7.59.0.Final</version>
</dependency><dependency>
   <groupId>org.drools</groupId>
   <artifactId>drools-decisiontables</artifactId>
   <version>7.59.0.Final</version>
</dependency><dependency>
   <groupId>org.kie</groupId>
   <artifactId>kie-spring</artifactId>
   <version>7.59.0.Final</version>
</dependency>

创建Drools规则文件在src/main/resources目录下创建一个名为rules的文件夹。在此文件夹中，创建一个名为sampleRule.drl的文件，并添加以下内容：

package com.example.drools

rule "Sample Rule"
when
    $person: Person(age < 18)
then
    System.out.println("Person is under 18 years old.");
end

创建实体类在com.example.drools包中创建一个名为Person的Java类，并添加以下内容：

public class Person {
    private String name;
    private int age;

    // Getters and setters
}

配置Drools 在com.example.drools包中创建一个名为DroolsConfig的Java类，并添加以下内容：

import org.kie.api.KieBase;
import org.kie.api.KieServices;
import org.kie.api.builder.KieBuilder;
import org.kie.api.builder.KieFileSystem;
import org.kie.api.builder.KieRepository;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
import org.kie.internal.io.ResourceFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class DroolsConfig {
    @Bean
    public KieBase kieBase() {
        KieServices kieServices = KieServices.Factory.get();
        KieRepository kieRepository = kieServices.getRepository();
        KieFileSystem kieFileSystem = kieServices.newKieFileSystem();
        kieFileSystem.write(ResourceFactory.newClassPathResource("rules/sampleRule.drl"));
        KieBuilder kieBuilder = kieServices.newKieBuilder(kieFileSystem);
        kieBuilder.buildAll();
        KieContainer kieContainer = kieServices.newKieContainer(kieRepository.getDefaultReleaseId());
        return kieContainer.getKieBase();
    }

    @Bean
    public KieSession kieSession() {
        return kieBase().newKieSession();
    }
}

编写测试用例在com.example.drools包中创建一个名为DroolsTest的Java类，并添加以下内容：

import org.junit.jupiter.api.Test;
import org.kie.api.runtime.KieSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import static org.junit.jupiter.api.Assertions.*;

@SpringBootTest
class DroolsTest {
    @Autowired
    private KieSession kieSession;

    @Test
    void testSampleRule() {
        Person person = new Person();
        person.setName("John Doe");
        person.setAge(16);

        kieSession.insert(person);
        int rulesFired = kieSession.fireAllRules();

        assertEquals(1, rulesFired);
    }
}

现在，你可以运行DroolsTest类中的测试用例来测试Drools规则。如果规则被正确触发，测试将通过。

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