在gradle构建中，项目B的测试类找不到项目A的java类，compileTestJava失败

我有一个项目结构，其中projectB（主类和测试类）依赖于ProjectA（主类） 命令：

错误：

Project B :compileTestJava FAILED
error: package <Project A java package e.g. com.alpha.beta> does not exist
import <Project A java class, e.g. com.alpha.beta.Manager>

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ProjectA的gradle：

 sourceSets {
   test {
           java.srcDirs = ['src/test/java', 'src/test/java2']
   }
 }  

 dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.10'
    testCompile group: 'jmock', name: 'jmock', version: '1.0.1'     
 }

jar
{   
     exclude 'com/alpha/beta/gamma/servlet' 
     manifest 
     { 
       attributes 'Implementation-Title': "ProjectA", 
       'Name': "com.alpha.beta.ProjectA",
      }
    
   }

  task ProjectA(type: Jar) {        
      baseName = project.name + "-testing"
      from sourceSets.main.output          
      include 'com/alpha/beta/gama/servlet/*.class'     
      manifest 
      { 
      attributes 'Implementation-Title': "ProjectA", 
      }
    }
   jar.dependsOn(ProjectAtest)
   }

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sourceSets {
   main {
           java.srcDirs = [ 'src/main/']
   }
   test {
           java.srcDirs = [ 'src/test/java', 'src/test/java2']
   }
}


dependencies {
     compile project(path: ':A', configuration: 'default')  
     testCompile group: 'junit', name: 'junit', version: '4.10'
}

jar 
{   
     manifest 
    { 
        attributes 'Implementation-Title': "ProjectB", 
        'Name': "com.alpha.beta.projectB",
        'Main-Class': "ProjectB.ComponentInformation",
    }   
  }

 sourceSets {
   test {
           java.srcDirs = ['src/test/java', 'src/test/java2']
   }
 }  

 dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.10'
    testCompile group: 'jmock', name: 'jmock', version: '1.0.1'     
 }

jar
{   
     exclude 'com/alpha/beta/gamma/servlet' 
     manifest 
     { 
       attributes 'Implementation-Title': "ProjectA", 
       'Name': "com.alpha.beta.ProjectA",
      }
    
   }

  task ProjectA(type: Jar) {        
      baseName = project.name + "-testing"
      from sourceSets.main.output          
      include 'com/alpha/beta/gama/servlet/*.class'     
      manifest 
      { 
      attributes 'Implementation-Title': "ProjectA", 
      }
    }
   jar.dependsOn(ProjectAtest)
   }