我创建了一个项目

- frog
  -- frog-web
  -- frog-test

• frog是根模块，没有代码
• frog-web是一个Spring引导模块，配置了bootJar，将封装成一个完整的jar
• frog-test是引用frog-web的单元测试模块，在测试frog-web类时抛出java. lang. NoClassDefFoundError

site/weic/grog/web/FrogWebApplication
java.lang.NoClassDefFoundError: site/weic/grog/web/FrogWebApplication
    at site.weic.frog.test.A01Test.a(A01Test.java:16)
    ...

我应该如何配置它，以便我可以在frog-test模块中对frog-web的类进行单元测试？谢谢!!!
这是密码

青蛙

• build.gradle

buildscript {
    repositories {
        mavenLocal()
        mavenCentral()
    }

    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:2.3.12.RELEASE")
    }
}

allprojects {
    apply plugin: 'java-library'
    apply plugin: 'org.springframework.boot'
    group 'site.weic'
    version 'dev-v0.2-SNAPSHOT'
    sourceCompatibility = JavaVersion.VERSION_1_8
    targetCompatibility = JavaVersion.VERSION_1_8
    tasks.withType(JavaCompile) {
        options.encoding 'UTF-8'
    }
    repositories {
        mavenLocal()
        maven { url 'https://maven.aliyun.com/repository/public' }
        mavenCentral()
    }
    bootJar {
        enabled false
    }
}

subprojects {
    apply plugin: 'io.spring.dependency-management'
    dependencies {
        annotationProcessor 'org.projectlombok:lombok'
        compileOnly 'org.projectlombok:lombok'
        implementation 'org.slf4j:slf4j-api'
    }
    dependencyManagement {
        dependencies {
            dependency "org.projectlombok:lombok:1.18.26"
            dependency "mysql:mysql-connector-java:8.0.23"
        }
        imports {
            mavenBom "org.springframework.boot:spring-boot-starter-parent:2.3.12.RELEASE"
        }
    }
}

蛙蹼

• site.weic.grog.web.FrogWebApplication

@SpringBootApplication
public class FrogWebApplication {

    public static void main(String[] args) {
        SpringApplication.run(FrogWebApplication.class, args);
    }
}

• build.gradle

bootJar {
    enabled true
}
dependencies {
    api 'org.springframework.boot:spring-boot-starter-web'
}

蛙跳测试

• site.weic.frog.test.A01Test

public class A01Test {

    @Test
    public void a(){
        // Here to test whether frog-web's classes can be access in module frog-test, 
        // NoClassDefFoundError will be thrown
        final FrogWebApplication web = new FrogWebApplication();
        System.out.println(123);
    }
}

• build.gradle

dependencies {
    implementation project(":frog-web")
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

test {
    useJUnitPlatform()
}